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Background Owing to their difficulty following clinical advice for procedural safety and ideal surgical outcomes, bariatric and metabolic surgery (BMS) for patients with disorders of intellectual development (DID) is concerning. Studies reporting the feasibility of BMS for this population remain scarce. This study aims to clarify the feasibility of laparoscopic sleeve gastrectomy (LSG) for patients with clinically severe obesity and DID. Methods A retrospective analysis of a single institutional prospective database collected from 2010 to 2022 was performed. The Wechsler Adult Intelligence Scale (WAIS) was used to measure intellectual ability before LSG. A multidisciplinary team approach was implemented to give special support and care to patients with DID. Patients were categorized into groups according to their WAIS scores. LSG outcomes were statistically compared between the DID and average intellectual ability groups. Results Using the WAIS to measure intellectual ability among patients who underwent LSG, we identified 14 patients with DID (IQ score: Conclusions With medical and social support and care, performing LSG on patients with clinically severe obesity and DID is safe, with good short-term results. Graphical abstract

In Japan, bariatric surgical treatment was started in 1982. The Japanese Society for Treatment of Obesity(JSTO) was established in 2007 and then JSTO started national registry of bariatric surgery cases and multidisciplinary educational program. 44 facilities registered bariatric surgical cases. In this study, the purpose is to clarify the indication, the safety and the effectiveness of the sleeve gastrectomy using national registry data base compiled by JSTO. Preoperative BMI was ranged from 27 to 75, and the mean value was 42.2. As gender, men/women was 1/1.3. Age was 42.2 as mean. As preoperative complications, DM ratio was 56.1% of the patients, Hypertension 63.2%, dyslipidemia 65.2%, and sleep apnea syndrome 69.4%. As operation method, laparoscopic method were taken in 99.5% of the cases. The intra operative incidents rate was 1.3 %. Conversion rate to open method was 0.98%. Morbidity ratio was 9.8% and mortality was 0 %. Reoperations were performed in 1.5 % of the cases. Postoperative hospital stay was 3.5 days in Median value. Body weight loss was 27.2 kg in the mean value after follow up days of 286 (fig.10). As the effect on the preoperative metabolic complications, DM has improved in 86.9 % of the cases, Hypertension 68.7 % and Dyslipidemia 67.9%. In conclusion, the usefulness of sleeve gastrectomy has been shown and verified that it is safely administered in Japan

Bariatric surgery has been shown to have a variety of metabolically beneficial effects for patients with type 2 diabetes (T2D), and is now also called metabolic surgery. At the 2nd Diabetes Surgery Summit held in 2015 in London, the indication for bariatric and metabolic surgery was included in the “algorithm for patients with type T2D”. With this background, the Japanese Society for Treatment of Obesity (JSTO), the Japan Diabetes Society (JDS) and the Japan Society for the Study of Obesity (JASSO) have formed a joint committee to develop a consensus statement regarding bariatric and metabolic surgery for the treatment of Japanese patients with T2D. Eventually, the consensus statement was announced at the joint meeting of the 38th Annual Meeting of JSTO and the 41st Annual Meeting of JASSO convened in Toyama on March 21, 2021. In preparing the consensus statement, we used Japanese data as much as possible as scientific evidence to consider the indication criteria, and set two types of recommendation grades, “recommendation” and “consideration”, for items for which recommendations are possible. We hope that this statement will be helpful in providing evidence-based high-quality care through bariatric and metabolic surgery for the treatment of obese Japanese patients with T2D. Supplementary Information The online version contains supplementary material available at 10.1007/s13340-021-00551-0.

Aim Clinical staging is vital for selecting appropriate candidates and designing neoadjuvant treatment strategies for advanced tumors. The aim of this review was to evaluate diagnostic abilities of clinical TNM staging for gastrointestinal, gastrointestinal cancers. Methods We conducted a systematic review of recent publications to evaluate the accuracy of diagnostic modalities on gastrointestinal cancers. A systematic literature search was performed in PubMed/MEDLINE using the keywords “TNM staging,” “T4 staging,” “distant metastases,” “esophageal cancer,” “gastric cancer,” and “colorectal cancer,” and the search terms used in Cochrane Reviews between January 2005 to July 2020. Articles focusing on preoperative diagnosis of: (a) depth of invasion; (b) lymph node metastases; and (c) distant metastases were selected. Results After a full‐text search, a final set of 55 studies (17 esophageal cancer studies, 26 gastric cancer studies, and 12 colorectal cancer studies) were used to evaluate the accuracy of clinical TNM staging. Positron emission tomography–computed tomography (PET‐CT) and/or magnetic resonance imaging (MRI) were the best modalities to assess distant metastases. Fat and fiber mode of CT may be useful for T4 staging of esophageal cancer, CT was a partially reliable modality for lymph node staging in gastric cancer, and CT combined with MRI was the most reliable modality for liver metastases from colorectal cancer. Conclusion The most reliable diagnostic modality differed among gastrointestinal cancers depending on the type of cancer. Therefore, we propose diagnostic algorithms for clinical staging for each type of cancer., We conducted a systematic review of recent publications to evaluate the accuracy of diagnostic modalities on gastrointestinal cancers. Such systematic review on all three cancer types—esophageal cancer, gastric cancer, colorectal cancer—cannot be found in recent publications on PubMed. We believe that this review may be fundamental information to design clinical studies related to neoadjuvant therapy for gastrointestinal cancers.

AIM: The J-SMART study was the first national survey of Japanese patients undergoing laparoscopic sleeve gastrectomy (LSG). We performed a subgroup analysis of J-SMART focusing on the differences in patient background and diabetes remission between patients with BMI 32–34.9 kg/m(2) and those with higher BMI. METHODS: In this multi-institutional retrospective study at 10 certified bariatric institutions, 203 Japanese with type 2 diabetes (T2D) and BMI of 32 kg/m(2) or higher were analyzed (mean age: 49.2 years, BMI: 43.8 kg/m(2), HbA1c: 7.6%). Patients were stratified into five groups according to preoperative BMI. RESULTS: Background characteristics in BMI 32.0–34.9 group were higher adjusted HbA1c, higher visceral/subcutaneous fat area ratio, higher prevalence of diabetic retinopathy, higher frequency of insulin use and lower serum C-peptide. Although 2-year percent total weight loss (21.7%) and diabetes complete remission (CR) rate (52.4%) were lower in BMI 32.0–34.9 group, diabetes improvement rate was 81.0%, and the decrease in HbA1c and number of antidiabetic drugs were comparable or greater than those with higher BMI. Higher BMI and no insulin use were significant independent predictors of diabetes CR. No significant independent predictor was identified for diabetes improvement. CONCLUSION: The patients with 32–34.9 kg/m(2) were characterized by more severe visceral obesity, T2D and the complications, and lower intrinsic insulin secretion capacity. LSG should be considered as a treatment option for patients with BMI 32–34.9 kg/m(2), to improve diabetes control.

Several recent studies suggest that serum anti-p53 antibodies (s-p53-Abs) may be combined with other markers to detect esophageal and colorectal cancer. In this study, we assessed the sensitivity and specificity of s-p53-Abs detection of a new electrochemiluminescence immunoassay (ECLIA; Elecsys anti-p53). Elecsys anti-p53 assay was used to analyze the level of s-p53-Abs in blood sera from patients with esophageal or colorectal cancer taken before treatment. Control blood sera from healthy volunteers, patients with benign diseases, and patients with autoimmune diseases served as a reference. In addition, squamous cell carcinoma antigen (SCC-Ag) and cytokeratin 19 fragments (CYFRA21-1) were assessed in patients with esophageal cancer, and carcinoembryonic antigen (CEA) and carbohydrate antigen (CA) 19-9 were assessed in patients with colorectal cancer. Samples from 281 patients with esophageal cancer, 232 patients with colorectal cancer, and 532 controls were included in the study. The median value of s-p53-Abs in control samples was

Among Asian countries, laparotomic and laparoscopic bariatric surgeries were introduced in Japan after its establishment in Taiwan. However, despite high prevalence of potential patients with obesity and diabetes, the wider incorporation of surgery into treatment regimen has been stalling for decades in Japan. While the unique Japanese national health insurance system has guaranteed fair healthcare delivery, it might have worked as a barrier to the development of bariatric and metabolic surgeries (BMS). The present article reviews the status of BMS in Japan and discusses recent issues related to its use. To focus on and identify the major obstacles inhibiting the widespread use of BMS, we have comprehensively covered some major areas including the insurance system, surgical indication, accreditation and training system, original research, and national registry.

Surgeons have increased physical stress during laparoscopic surgery due to operative site constraints. We developed a wearable device to reduce the physical stress on surgeons' lower extremities. The device mechanically facilitates maintaining a near-upright posture. The surgeon's knees are gently bent by a knee-joint locking mechanism, and fixing and releasing are performed independently on each side. The subjects were one female and two male surgeons, who wore the device during laparoscopic inguinal hernia repair or high anterior resection. Surface electromyogram (EMG) was conducted for both iliopsoas muscles. Control values were determined with the subject not wearing the device. Participants completed a post-procedure questionnaire. With the device, EMG activity had a tendency to decrease in the left iliopsoas muscle (P = .055), but it changed little on the right (P = .406). The post-procedure questionnaire showed an overall positive impression, although subjects reported some difficulty walking. This device decreases EMG activity and may improve a surgeon's work environment.

This study aimed to evaluate the uptake of the clinical effectiveness of [S-methyl

To elucidate tumor cell behavior associated with cancer stem cell (CSC) marker expression, the expression of CD133, CD44v9, and ALDH1A1, which are considered markers of CSCs, was examined in sporadic and ulcerative colitis (UC)-associated colorectal tumors.A total of 23 cases of sporadic colorectal cancer and 44 cases of adenoma were collected. Additionally, 22 cancer lesions and 38 dysplasia lesions were selected from 28 colectomy cases of UC with neoplastic lesions. Lesions were examined by immunohistochemistry using primary antibodies against CD133, CD44v9, ALDH1A1, Ki-67, cleaved-Caspase 3, and p53.CD133, CD44v9, and ALDH1A1 showed higher expression in both sporadic and UC-associated tumors than in the normal mucosa. ALDH1A1 expression in sporadic cancer was higher in the right colon than in the left colon (p=0.0089). ALDH1A1 expression in UC-associated cancer was higher in those with longer disease duration than in those with shorter disease duration (p=0.019). The CD44v9+/CD133- region had fewer cleaved-Caspase 3 positive cells in both sporadic and UC-associated cancers. In sporadic cancer, CD133+/ALDH1A1+ regions had fewer apoptotic cells than CD133+/ALDH1A1- regions, while CD133+/ALDH1A1- regions were less proliferative than CD133+/ALDH1A1+ regions in UC-associated cancer.CD44+/CD133- regions were commonly associated with low apoptosis in sporadic and UC-associated cancers; thus, these were considered target areas for CSCs. Additionally, the combination of markers comprising CSCs may differ between sporadic and UC-associated cancers.

The number of laparoscopic sleeve gastrectomies (LSGs) performed in patients with obesity who are eligible for bariatric and metabolic surgery is currently much lower in Japan than in other countries. Considering the large number of potential patients with obesity and type 2 diabetes and the unique Japanese national health insurance system that guarantees fair healthcare delivery, there is room to increase the number of LSGs in Japan in the near future. However, strict health insurance regulations may limit access to mandatory devices needed to treat postoperative complications, such as staple line leakage, which can cause severe morbidity and even mortality. Therefore, understanding the pathogenesis and treatment options for this complication is crucial. This article examined the current situation in Japan and its impact on staple line leakage management, including the role of endoscopic treatment in reducing reoperation. The authors suggest increasing education and collaboration between healthcare professionals to optimize management and improve patient outcomes.

Background Although diffusion-weighted magnetic resonance imaging (DWI) for detecting lymph node (LN) metastasis is reported to be a successful modality for primary malignant tumors, there are few studies relating to esophageal cancer. This study aimed to clarify the diagnostic performance of DWI for assessing LN metastasis compared with positron emission tomography (PET) in patients with esophageal squamous cell cancer (eSCC). Methods Seventy-six patients with histologically proven eSCC who underwent curative esophagectomy without neoadjuvant treatment were reviewed retrospectively. Harvested LNs were divided into 1229 node stations with 94 metastases. Diagnostic abilities and prognostic significance were compared. Results In a station-by-station evaluation, the sensitivity was higher in DWI than PET (67% vs. 32%, P P P = 0.048), as was PET-N status (HR 2.481; P = 0.033). Conclusions DWI, which depends on cancer cell volume followed by elevated intranodal density, is a non-invasive modality and showed higher sensitivity than PET. It has clinical impact in predicting postoperative survival for patients with eSCC alongside its diagnostic ability and has significant performance in clinical practice.

Characteristics of Staphylococcus aureus infections include biofilm formation, leading to the spread of bacteria to the bloodstream causing sepsis and metastatic infections. In particular, in methicillin-resistant S. aureus (MRSA) infections, biofilm formation critically hampers treatment and causes poor prognosis. We explored the biofilm formation of MRSA in the presence or absence of plasma and compared morphological characteristics, accumulation of antibiotics, and resistance to bactericidal activity, using continuous optimizing confocal reflection microscopy. Addition of plasma significantly increased biofilm formation, which is characterized by an uneven surface and aggregation of bacteria (hereafter plasma biofilm). The flow-cell system, which enabled a continuous supply of plasma, accelerated biofilm formation in both the tested strains of MRSA (BAA1556 and N315). Accumulation of green fluorescence-labeled vancomycin was observed within 5 minutes in the plasma-free biofilm, but not in the plasma biofilm. Delay of accumulation was also observed for daptomycin in plasma biofilm. Plasma biofilm bacteria were more resistant to anti-MRSA antibiotics than plasma-free biofilm bacteria. These data demonstrate that the plasma biofilm of S. aureus is substantially different from the plasma-free biofilm. Plasma biofilm, especially in the flow-cell system, could be a clinically relevant model to analyze MRSA infections and treatment.

Background Current medical treatments can achieve remission of ulcerative colitis (UC). Surgery is required when potent drug treatment is ineffective or when colon cancer or high-grade dysplasia develops. The standard procedure is restorative proctocolectomy (RPC) with ileal pouch-anal anastomosis, commonly performed as two- or three-stage RPC with diverting ileostomy. Postoperative stoma outlet obstruction (SOO) is frequent, but the causes are not well known. Aim To identify the risk factors for SOO after stoma surgery in patients with UC. Methods We retrospectively reviewed the files of 148 consecutive UC patients who underwent surgery with stoma construction. SOO was defined as small bowel obstruction symptoms and intestinal dilatation just below the penetrating part of the stoma on computed tomography. Patients were divided into two groups: Those who developed SOO within 30 d after surgery and those who did not. Patient characteristics, intraoperative parameters, the stoma site, and rectus abdominis muscle thickness were collected. Moreover, we identified the patients who repeatedly developed SOO. Univariate and multivariate analyses were performed to identify risk factors for SOO and recurring SOO. Results Eighty-nine patients who underwent two-stage RPC were included between January 2008 and March 2020. Postoperatively, SOO occurred in 25 (16.9%) patients after a median time of 9 d (range 2-26). Compared to patients without SOO, patients with SOO had a significantly higher rate of malignant tumors or dysplasia (36.0% vs 17.1%, P = 0.032), lower total glucocorticoid dose one month before surgery (0 mg vs 0 mg, P = 0.026), higher preoperative total protein level (6.8 g/dL vs 6.3 g/dL, P = 0.048), higher rate of loop ileostomy (88.0% vs 55.3%, P = 0.002), and higher maximum stoma drainage volume (2300 mL vs 1690 mL, P = 0.004). Loop ileostomy (OR = 6.361; 95%CI 1.322-30.611; P = 0.021) and maximum stoma drainage volume (OR = 1.000; 95%CI 1.000-1.001; P = 0.015) were confirmed as independent risk factors for SOO. Eighteen patients with SOO were treated conservatively without recurrence (sSOO group). Seven (28.0%) patients repeatedly developed SOO (rSOO group) during the observation period. A significant difference was observed in the rectus abdominis muscle thickness between the two groups (sSOO 9.3 mm, rSOO 12.7 mm, P = 0.006). Muscle thickness was confirmed as an independent risk factor for recurring SOO (OR = 2.676; 95%CI 1.176-4.300; P = 0.008). Conclusion In this study, high maximum stoma drainage volume and loop ileostomy are independent risk factors for SOO. Additionally, among patients with a thick rectus abdominis muscle, the risk of SOO recurrence is high.

Aim Evaluation of the therapeutic efficacy of carbon-ion radiation therapy for isolated lymph node recurrence following curative resection of esophageal cancer. Materials and methods Ten cases with lymph node recurrence after esophageal cancer surgery were treated with carbon-ion radiation therapy. A total of 48.0 Gy [relative biologic effectiveness (RBE)] was delivered over 3 weeks with a daily dose of 4.0 Gy (RBE). Results The median follow-up duration was 27.1 months (range=3-92.0 months) after carbon-ion radiation therapy. The local control rates at 2, 3 and 5 years were 92.4%. The overall survival rates at 2, 3 and 5 years were 70.0%, 58.3% and 21.9%. The median survival period was 45.3 months after carbon-ion radiation therapy. There were no toxicities of grade 3 or higher. Conclusion Carbon-ion radiation therapy may be a safe and effective treatment option for isolated lymph node recurrence after radical surgery for esophageal cancer.

Gastric leakage and stricture are challenging complications of sleeve gastrectomy (SG). Failure of endoscopic intervention necessitates revision surgery. We describe two cases in which proximal gastrectomy with double tract reconstruction (PG with DTR) was performed in patients with chronic gastric fistula and twisted gastric tube after SG. Following resection of the affected part of the proximal stomach, reconstruction was achieved with three anastomoses [esophagojejunostomy (EJ), gastrojejunostomy (GJ), and jejunojejunostomy]. DTR provides two exit routes, the remnant stomach and the distal jejunum. The GJ was created 15 cm below the EJ with a stoma 10 mm in diameter, which can pass a standard endoscope. Both cases were a success without any short-term complications. PG with DTR could be an alternative option for refractory complications of SG.

A male patient in his early seventies complained of swallowing difficulty and back pain. Esophagogastroscopy was performed and the patient was diagnosed as squamous cell carcinoma in the middle and lower part of the esophagus with a longitudinal submucosal elevation of 15 cm and S2 stage of gastric ulcer infected by Helicobacter pylori. Multiple lymph node swelling was detected not only in the mediastinum but also in the neck and the para-aortic area by CT scanning. The clinical stage was T3 N4 M0 Stage IVa. Systemic chemotherapy was applied first and the curative effectiveness was SD based on the RECIST criteria. PET revealed accumulation of FDG in the esophageal and stomach wall. These lesions were suspected to be HP-infected esophageal cancer, and Helicobacter pylori elimination was performed. After HP eradication, the tumor of the esophagus, submucosal elevation of esophagus, and gastric ulcer was markedly shrunk. Multiple lymph node swelling was definitely shrunk based on CT. Overall the early esophageal cancer remained. Endoscopic submucosal dissection (ESD) was performed. The pathological diagnosis was Type 0-IIc, pT1b(SM2), ly1, v2, pHM0, pVM0. After ESD, he indicated febrile neutropenia, was diagnosed as myelodysplastic syndrome (MDS) during the follow-up period and chose best supportive care (BSC).

A 78-year-old man underwent an upper gastrointestinal endoscopy for evaluation of epigastralgia. Endoscopy revealed a bulky type 3 tumor in the lesser curvature of the upper body. A biopsy showed a poorly differentiated adenocarcinoma with signet ring cell carcinoma. Additionally, abdominal computed tomography(CT)showed bulky lymph node metastases leading to a diagnosis of cT3N2M0, Stage III A carcinoma. Following administration of 2 courses of neoadjuvant chemotherapy (NAC)using S-1/cisplatin(CDDP), CT revealed significant regression of the primary lesion and lymph nodes. Eventually, laparoscopic total gastrectomy was performed. Histopathologically, almost all viable cancer cells had been cleared from the primary lesion, and no cancer cells were found in the lymph nodes, which indicated a pathological partial response(Grade 2). NAC could be a valid option for the treatment of advanced gastric cancer.

Background A new qualitative diagnostic image which represented the histological responses was developed using 3D-volume rendered MD-CT, and which was applied for the estimation of down staging after chemoradiotherapy (CRT) followed curative resection for T4 advanced esophageal cancer. Methods 95 cases of T4 advanced esophageal cancer which underwent CRT were enrolled CRT protocol: 40–60Gy dose of irradiation were done and concurrently CDDP 15(mg/mm2) and 5-FU 500(mg/mm2) were administered in day 1–5 i.v.. Down staging estimation by MD-CT rendering: Contrast media (300mg iodine/ml, 3ml/kg) was administrated intravenously (3ml/sec). CT (GE: Light Speed 16) scans were performed (slice thickness: 1.3 mm) at 50 seconds delay before and after CRT. A workstation Virtual Place(AZE) was used for rendering the diagnostic image which represented histological response with specially selected colors and opacities. Down staging was diagnosed by the fibrotic change(CT value Results Down staging ratio were 48% in T4 aorta, 17% in trachea,35.7% in bronchus, and 44.4% in pulmonary vein. In the irradiation dose of 41.3 ± 2.5Gy, 24cases (25.3%) (Group A) and in 61.8 ± 3.15Gy,12 cases (12.6%) obtained down staging. 30 days after CRT, 13 cases of Group A and 10 of Group B underwent curative esophagectomy. In the pathological examination, response rate were 60.8% in group A and 80% in group B. The outcome after resection was 40% in the five year survival (n = 23). Conclusion The qualitative diagnostic image rendered by 3D-enhanced MD-CT was useful for the down staging evaluation after CRT to estimate curability of followed resection for T4 advanced esophageal cancer. Early estimation of the down staging at the dose of 40Gy seemed to be necessary to plan the followed resection safely and survival benefit were obtained in the curatively resected case with histological response. Disclosure All authors have declared no conflicts of interest.

Background The oxaliplatin-based regimen FOLFOX is widely used to treat patients with advanced colorectal cancer (CRC). However, dose-limiting toxicity after continuous oxaliplatin administration can lead to peripheral neuropathy. Several agents, including opioids, that have been employed to treat oxaliplatin-induced peripheral neuropathy (OIPN) have been examined in clinical settings regarding their protective and therapeutic effects. However, the pharmacotherapy of these agents has not yet been established. Therefore, we investigated the efficacy and tolerability of oxycodone for OIPN and subsequently with FOLFOX therapy in CRC patients. Methods This was a single-center retrospective study of 64 CRC patients who underwent FOLFOX therapy at the Toho University Sakura Medical Center (Sakura, Japan). Controlled-release (CR) oxycodone was concomitantly administered to 29 patients (OXY group), whereas the additional 35 patients (non-OXY group) were not given oxycodone during the FOLFOX treatment course. The incidence and severity of OIPN and the number of FOLFOX cycles were measured and compared between the two groups. Neurological toxicities were assessed according to the Common Terminology Criteria for Advanced Events, version 3.0. Results All study patients had OIPN. Most patients experienced grade 1 or 2 sensory neuropathy. Grade 3 sensory neuropathy was observed in two patients in the non-OXY group. All patients in the OXY group completed the scheduled FOLFOX therapy, whereas FOLFOX therapy was discontinued in ten patients in the non-OXY group due to severe peripheral neuropathy. The median numbers of FOLFOX cycles in the OXY and non-OXY groups were 13 (range, 6–46) and 7 (range, 2–18), respectively (P

The purpose of this study is to evaluate whether computed tomography perfusion (CTP) can evaluate the biological change during chemoradiation therapy (CRT) and the survival of patients with esophageal cancer after CRT. Thirty-two consecutive patients (31 men, 1 woman; mean age 65.9 years) with esophageal squamous cell carcinoma underwent CTP before and 2–3 weeks after CRT. The perfusion data were analyzed using software based on the deconvolution method. We investigated the relationship between the changes of CTP parameters during CRT, the response to CRT and outcome. This study included 22 clinical responders and 10 non-responders. Post-CRT blood flow (BF) was significantly lower than pre-CRT (P = 0.0003). BF in responders decreased significantly greater than in non-responders (P

We report a unique case of giant obstructing inflammatory polyposis associated with ulcerative colitis (UC). A 25-year-old Japanese man with an UC history of 2 years and 6 months was referred to our institution because of diarrhea and melena. His computed tomography scan showed marked dilation of the transverse and descending colon; therefore, we performed total colectomy. Macroscopic evaluation of the excised specimen indicated constricting lesions with giant polyposis in the transverse and descending colon. The polyposis consisted of narrow worm- or noodle-like polyps that bridged over the irregular ulcers. Histologic evaluation of the excised specimen indicated transmural inflammation with a thickened proper muscular layer overlaid with inflammatory polyposis. Based on these data, a diagnosis of giant inflammatory polyposis should be considered in patients who have had UC. Although giant inflammatory polyposis is considered benign, surgical treatment may be indicated to avoid serious complications.

The number of laparoscopic sleeve gastrectomy (LSG) performed worldwide is increasing continuously. Serious complications are relatively rare, but staple line leakage after LSG remains one of the most dreaded acute complications. Endoscopic treatments play a major role in treating sleeve leakage after initial surgical or percutaneous perigastric abscess control. Despite the high success rate of endoscopic treatments, some patients who fail treatment can develop refractory chronic leakage or fistula; therefore, they require revision operation such as Roux-en-Y gastric bypass or even total gastrectomy. We herein comment on percutaneous transesophageal gastro-tubing (PTEG) as a non-endoscopic, non-surgical alternative treatment option in patients for whom it may be desirable to avoid complex reoperation for sleeve leakage.

It is well-known that gene expression levels should be normalized to a carefully selected and appropriately stable internal control gene. However, numerous studies have demonstrated that the expression of housekeeping (HK) genes, typically used as internal control genes varies considerably. A number of studies have shown that β-2 microglobulin (B2M), an HK gene, frequently used as an internal reference gene, is expressed at low levels in colorectal cancer tissue, when assessed using real-time reverse transcriptase-polymerase chain reaction (RT-PCR). Due to the fact that the expression levels of various HK genes vary depending on the tissue type or experimental conditions, it has been suggested that several control genes should be analyzed in parallel for certain tissues. In the present study, mRNA expression levels of toll-like receptors 2 (TLR2) and 4 (TLR4) in sporadic human colorectal cancerous and non-cancerous tissues were analyzed relative to three HK genes, β-glucuronidase (GUS), β-actin (BA) and B2M, using a commercially available tool. Relative expression levels were quantified using the three genes individually and together, and TLR2 as well as TLR4 expression was compared in cancerous and non-cancerous colorectal tissue specimens. Consistent data were obtained in most cases when GUS and BA were used as internal control genes. When B2M was used as the internal control gene, TLR2 and TLR4 expression was demonstrated to be higher in cancerous compared to non-cancerous colorectal tissues. These results were consistent with previous observations of low-level B2M expression in cancerous colorectal tissue and suggest that B2M may be inappropriate as an internal control gene for gene expression studies of colorectal cancer.

Laparoscopic distal gastrectomy has gained wide acceptance, and laparoscopic total gastrectomy (LTG) and laparoscopic proximal gastrectomy (LPG) are now also performed for gastric cancer. We extended these techniques to treat Siewert type II adenocarcinoma of the esophagogastric junction (AEG). Ten patients with clinical T1 AEG type II underwent laparoscopic transhiatal (LTH) resection combined with LTG reconstructed by Roux-en-Y (LTH+LTG: n=2) or LPG reconstructed by jejunal interposition (LTH+LPG: n=8). Intracorporeal esophagojejunostomy was performed using a circular stapler, of which the anvil head was introduced transabdominally or transorally. The median operation time was 243 minutes, and blood loss was 25.5 g. There were no intraoperative complications or conversion to open surgery. No anastomotic leak was observed, but 1 diaphragmatic herniation to the left thoracic cavity occurred postoperatively. The median length of the proximal margin was 14.5 mm. This operation is technically feasible and can be safely performed after adequate experience of LTG or LPG, though esophagojejunostomy in the mediastinum is technically demanding.

Background Carbon-ion radiotherapy (CIR) has been under development. We report the results of a phase I/II clinical trial of preoperative CIR for esophageal squamous cell carcinoma (ESCC). Methods Thirty-one thoracic ESCC patients were enrolled. They were first treated with CIR. The radiation dose was escalated from the initial dose of 28.8 GyE up to 36.8. Four to 8 weeks after CIR followed by clinical evaluation of the therapy, surgery was performed. Thereafter, a pathological evaluation was made. Results Acute toxicity was not seen except in one case (3.2%), and there were no late toxicities. Throughout the study period, there were no cases of withdrawal due to the effects of preoperative CIR. Twelve out of 31 (38.7%) patients achieved a clinical complete response (CR) and 13 patients (41.9%) achieved a partial response. Twelve out of 31 patients (38.7%) achieved a pathological CR. The overall 1-, 3-, and 5-year survival rates in the stage I cases were 91%, 81%, and 61%, and was 100%, 85%, and 77% for the stage II, and 71%, 43%, and 29% for the stage III cases, respectively. Conclusions CIR showed strong local tumor control and is highly effective as a neoadjuvant therapy without severe adverse events. J. Surg. Oncol. 2012; 105:750–755. © 2011 Wiley Periodicals, Inc.

Since April 2010, the Japanese Public Health Insurance System has covered the costs incurred for performing ¹⁸F-fluoro-2-deoxyglucose positron emission tomography (FDG-PET) imaging for patients with advanced gastric cancer. The aim of this review was to evaluate the clinical impact of PET for patients with gastric cancer. A systematic literature search was performed in PubMed/MEDLINE using the keywords "gastric cancer" and "PET" to search for relevant articles published from January 2000 to September 2010. The clinical impact of selected articles was assessed by the authors to evaluate the following: (a) tumor staging, (b) diagnosis for recurrent disease, (c) evaluation of treatment response, and (d) screening for gastric cancer. FDG uptake increases in papillary adenocarcinoma, tubular adenocarcinoma, and solid-type poorly differentiated adenocarcinoma. This uptake is also associated with glucose transporter 1 expression. The sensitivity and specificity of FDG-PET for metastatic lymph node detection were 21-40% and 89-100%, respectively. The sensitivity and specificity for distant metastasis detection were 35-74% and 74-99%, respectively. Treatment response can be detectable at an earlier stage by PET than by computed tomography (CT), because FDG uptake by cancer cells decreases according to the treatment response. In summary, although PET has limitations such as frequent false-negative cases in signet-ring cell carcinoma and non-solid type poorly differentiated carcinoma, it can contribute to the selection of a more appropriate treatment modality by detecting distant metastases and treatment response.

Background: The purpose of this study was to assess whether apparent diffusion coefficient (ADC) values of esophageal squamous cell carcinoma (ESCC) predict responses to chemoradiotherapy (CRT) and/or patient prognosis. Methods: Magnetic resonance images were acquired to construct the diffusion-weighted images, and the ADC values were calculated before CRT in 80 patients with ESCC. A high-ADC group responded better to CRT than did a low-ADC group (p < 0.01). We divided the 80 patients into two groups based on the operating characteristic analysis: one group comprised patients with ADC values higher than the average ADC of the esophageal cancer tissue (1.10 × 10–3 mm2/s), and the other group comprised those whose ADC values were less than the average value. A Kaplan-Meier analysis showed that the survival rate in the high-ADC group was significantly better than that in the low-ADC group (p = 0.04). Conclusion: Our results indicate that the ADC value may be a useful marker to predict treatment response as well as survival for patients with ESCC.

Laparoscopic total gastrectomy (LTG) has not gained widespread acceptance because of technical difficulties, especially esophagojejunal anastomosis. Various modified procedures for reconstruction have been reported, but an optimal method has not been established. The authors report a circular-stapled anastomosis using hand-sewn purse-string sutures, which is a simple and classic method. However, no previous study has assessed its reliability.From September 2008 to May 2009, 10 consecutive patients (9 men and 1 woman) with gastric cancer underwent LTG at the authors' institution. These patients had a median age of 63.7 years (range, 45-80 years) and a body mass index of 22.4 kg/m(2) (range, 18-26 kg/m(2)). After transection of the abdominal esophagus, a hand-sewn purse-string suture along the cut end of the esophagus was performed using 3-0 monofilament thread. An anvil head then was inserted into the esophagus, and the thread was tied. A monofilament pretied loop suture was added to reinforce the ligation. After the creation of an Roux-en-Y jejunal limb, laparoscopic esophagojejunal anastomosis was performed using a circular stapler inserted via a surgical glove attached to a wound retractor at the incision point at the umbilicus. The jejunal stump was closed with an endoscopic linear stapler.Laparoscopic esophagojejunostomy was performed successfully for all the patients. No postoperative complications related to anastomosis occurred. In one patient, an intraabdominal abscess developed postoperatively and was treated conservatively. The mean operation time was 257 min, and the estimated blood loss was 69 ml.With the described method, esophagojejunostomy can be performed as in conventional open surgery. Hand-sewn purse-string suturing is demanding technically, but it can be performed safely by experienced laparoscopic surgeons. This technique is feasible and can lower the cost of the laparoscopic procedure. It may be considered in countries with limited access to other special devices.

治癒切除不能な進行・再発結腸および直腸癌に対してOxaliplatin（l-OHP）の適応が承認され，多くの施設で投与されている．末梢神経障害による神経因性疼痛はl-OHPの用量制限毒性の1つである．原因として神経線維細胞のNaチャンネルの異常が注目されたが，その機序は解明されていない．カルシウム・マグネシウム製剤をl-OHP投与の前後に施行するなどの対応策が講じられているが，我が国では未だ有効な予防法はない．当科でOxycodone投与によって，l-OHPによる神経因性疼痛が著明に軽減しl-OHPの継続投与が可能であった3例を経験した．これらの症例ではOxycodoneの低用量，短期間投与でl-OHPによる神経因性疼痛を軽減できたことから，Oxycodone併用投与はl-OHPの継続投与を可能とする一助となり得ると考える．

PURPOSE: The ability to evaluate clinicopathologic features and prognosis before surgery by contrast-enhanced CT would be valuable for managing rectal cancer. This study was designed to evaluate the clinical usefulness of perfusion CT in patients with rectal cancer before surgery. METHODS: Forty-four consecutive patients (27 men, 17 women; median age, 63.6 years) with rectal cancer underwent perfusion CT before surgery. We retrospectively investigated the correlations between tumor blood flow generated by perfusion CT and clinicopathologic features. RESULTS: There was a significant correlation between blood flow and wall invasion (P = 0.04). Well-differentiated tumors showed significantly higher blood flow than moderately differentiated tumors (P = 0.03). There was a significant tendency for tumors with low blood flow to show lymph node metastasis (P = 0.0005), vascular invasion (P = 0.004), lymphatic invasion (P = 0.04), and distant metastasis (P = 0.0005). For blood flow, accuracy was 75% for detection of tumors with lymph node metastasis if the cutoff point was set at 55 ml/100 g per minute. Patients with high blood flow tumors survived significantly longer than those with low blood flow tumors (P = 0.002). CONCLUSIONS: Blood flow of rectal cancers may be useful to evaluate pathologic features and prognosis before surgery.

Although the presence of serum p53 antibody (s-p53-Abs) before treatment has been shown to correlate with poor prognosis and lymph node metastasis in esophageal cancer, there has been little information about postoperative s-p53-Abs titer and perioperative changes of s-p53-Abs titers in patients with esophageal carcinoma. A highly specific enzyme-linked immunosorbent assay was used to analyze s-p53-Abs in 110 patients with esophageal squamous cell carcinoma before and 1 month after surgery. The cutoff level of 1.3 U/ml was used to indicate seropositive patients. Impact of postoperative s-p53-Abs titer and perioperative changes of s-p53-Abs on survival was evaluated. Forty (36%) of 110 patients were positive for s-p53-Abs before surgery and 35 patients (32%) were positive after surgery. s-p53-Abs titer generally decreased after surgery. Among sero-positive patients, the patients who remained sero-positive after surgery (n = 28) had a worse prognosis than patients who showed sero-conversion (P = 0.02). Among sero-positive patients, the nondecreased titer group showed significantly unfavorable survival (P

Because invasion to an adjacent organ (T4) indicates highly advanced disease, and most surgeons avoid esophagectomy, the prognostic impact of clinicopathologic factors for survival of these patients after esophagectomy has rarely been analyzed.From 1960 to 2005, a total of 268 patients with esophageal squamous cell carcinoma underwent esophagectomy for pathologic T4 disease (pT4). The impact of clinicopathologic factors on survival was evaluated by univariate and multivariate analysis. Changes in surgical outcomes and longterm survival between the earlier period (1960 to 1989) and the later period (1990 to 2005) were analyzed.Overall survival rates of all patients were 25% at 1 year, 10% at 3 years, and 5% at 5 years. The survival curve of the later group was significantly better than that of the earlier group (p0.01). Multivariate analysis indicated that venous invasion (hazards ratio, 1.76; 95% CI, 1.33 to 2.33, p0.01) and presence of a postoperative complication (hazards ratio, 2.62; 95% CI, 1.96 to 3.51, p0.01) were independent risk factors for poor overall survival. Presence of residual cancer was also an independent risk factor for poor cause-specific survival (hazards ratio, 2.40; 95% CI, 1.23 to 4.69, p=0.01). Venous invasion and intramural metastasis were risk factors for residual cancer. A total of 38 (14%) patients, 15 in the early period and 23 in the later period, underwent complete resection (R0). Although overall survival after R0 resection in the later period improved slightly, cancer-related survival rates were similar in both periods.Although overall survival of patients with pT4 improved after 1990, this improvement might be mainly dependent on curability of the resection.

Background/Aims: In esophageal cancer patients, postoperative pneumonia frequently occurs. In the oral cavity, dental plaque is a major reservoir of bacteria, and it is possible that oral bacteria are aspirated into the upper respiratory tract after esophagectomy. We evaluated the interaction between preoperative dental plaque and postoperative pneumonia in patients undergoing esophagectomy. Patients and Methods: Thirty-nine patients with thoracic esophageal cancer who underwent esophagectomy were investigated. Preoperatively, dental plaque was collected and the bacterial flora investigated. If postoperative pneumonia occurred, the sputum was harvested and the pathogens were evaluated. Result: Postoperative pneumonia was observed in 14 patients (35.9%): 5 (71.4%) of 7 patients in the pathogen-positive group and 9 (28.1%) of 32 patients in the pathogen-negative group. In 2 (40.0%) of 5 patients with postoperative pneumonia, who had pathogenic bacteria in the preoperative dental plaque, the same pathogenic bacteria were also identified in the postoperative sputum. Conclusion: Pathogens in preoperative dental plaque are risk factors for postoperative pneumonia following thoracotomy in patients with thoracic esophageal cancer.