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Abstract Introduction Pseudomyxoma peritonei (PMP) is a generalized term, usually known as “jelly belly” since 1884. Incidence is very low, 1–3 per million people per year. Because of its indolent nature, it is usually diagnosed at an advanced stage, thereby impacting the quality of life. The 5-year survival rate varies from 23 to 86% in world literature. Even 10 years and 20 years of survival have been described. With our experience, we like to propose rename of PMP as abdomino-peritoneal mucinous carcinoma (APM) as we strongly feel the time has come to specify the term and standardize the management strategy. Methodology In the premier institute of India and as a tertiary referral center, we experienced the maximum number of advanced cases of APM. From 2012 to 2021, we analyzed all the APM patients based on a prospectively maintained computerized database in the department of surgical oncology and found the reasons for renaming from this traditional one. Results We included a total of 87 patients who underwent surgical intervention. Thirty-five patients underwent cytoreductive surgery (CRS) with hyperthermic intraperitoneal chemotherapy (HIPEC), and 52 patients underwent debulking. In CRS-HIPEC patients, CC-0 was achieved in 28 patients (80%), CC-1 in 4 patients (11.4%), and CC-2 in 3 patients (8.6%). Palliative intent HIPEC was done in 3 patients (8.6%). Clavien-Dindo grade III and IV morbidity was observed in 18.8% of patients with 90 days mortality of 5.7%. Conclusion With our long-term experience and advancement of scientific evidence, we like to propose a new name for PMP as APM. We strongly believe this paper will give a clear picture of this rare disease and standard management outlines.

Low-grade appendicular mucinous neoplasms are rare. In contrast to other malignant tumors, they lack the ability for infiltrative growth or lymph node metastasis, but intraperitoneal mucin spread may lead to a life-threatening condition, known as a pseudomyxoma peritonei. Patient, a 47-year-old female, with complaints of a palpable mass in her right inguinal area, presented to our clinic. After a clinical workup, which included computer tomography, magnetic resonance imaging, and colonoscopy, a preliminary diagnosis of LAMN was established. Laparoscopic cecal pole resection was performed. A pathological examination confirmed the diagnosis of LAMN. Patient was followed up for six months after the surgery, at which point a contrast-enhanced CT scan was obtained with no pathological findings. Mucinous neoplasms of the appendix are a group of tumors in which mucin accumulates within the lumen of the appendix and while this type of neoplasia cannot spread hematologically, extramural mucin may lead to pseudomyxoma peritonei. Not long ago, a right hemicolectomy was accepted as a radical treatment method. Nowadays various studies have shown that laparoscopic appendectomy may be a safe option in patients with mucin, confined to the lumen of the appendix. This case holds educational value due to the detailed course of the disease presented and justified clinical decisions. LAMN is a rare type of neoplasm. When confined to the lumen of the appendix, it lacks the ability for infiltrative growth and lymph node metastasis. Appropriate treatment in case of a contained disease is surgical removal. • This manuscript describes a case of LAMN confined to the lumen of the appendix. • Laparoscopic cecal pole resection was performed. • Data on LAMN pathological exams from our institution was reviewed. [ABSTRACT FROM AUTHOR]

Introduction: Pseudomyxoma peritonei (PMP) is a generalized term, usually known as "jelly belly" since 1884. Incidence is very low, 1–3 per million people per year. Because of its indolent nature, it is usually diagnosed at an advanced stage, thereby impacting the quality of life. The 5-year survival rate varies from 23 to 86% in world literature. Even 10 years and 20 years of survival have been described. With our experience, we like to propose rename of PMP as abdomino-peritoneal mucinous carcinoma (APM) as we strongly feel the time has come to specify the term and standardize the management strategy. Methodology: In the premier institute of India and as a tertiary referral center, we experienced the maximum number of advanced cases of APM. From 2012 to 2021, we analyzed all the APM patients based on a prospectively maintained computerized database in the department of surgical oncology and found the reasons for renaming from this traditional one. Results: We included a total of 87 patients who underwent surgical intervention. Thirty-five patients underwent cytoreductive surgery (CRS) with hyperthermic intraperitoneal chemotherapy (HIPEC), and 52 patients underwent debulking. In CRS-HIPEC patients, CC-0 was achieved in 28 patients (80%), CC-1 in 4 patients (11.4%), and CC-2 in 3 patients (8.6%). Palliative intent HIPEC was done in 3 patients (8.6%). Clavien-Dindo grade III and IV morbidity was observed in 18.8% of patients with 90 days mortality of 5.7%. Conclusion: With our long-term experience and advancement of scientific evidence, we like to propose a new name for PMP as APM. We strongly believe this paper will give a clear picture of this rare disease and standard management outlines. [ABSTRACT FROM AUTHOR]

Purpose: To determine the incidence rate and identify predictive factors for interval appendectomy after non-operatively treated complicated appendicitis. Methods: Single-center retrospective cohort study conducted between January 2008 and June 2017. Adult patients with acute appendicitis were identified. Patients with complicated appendicitis initially treated non-operatively were included. Outcomes included abscess rate on imaging, results of additional imaging during follow-up, incidence rate of and surgical indications for interval appendectomy, and outcomes of histological reports. Results: Of all adult patients with acute appendicitis (n = 1839), 9% (170/1839) was initially treated non-operatively. Median age of these patients was 55 years (IQR 42–65) and 48.8% (83/170) were men. In 36.4% (62/170) of the patients, an appendicular abscess was diagnosed. 62.4% (106/170) did not require subsequent surgery (no interval appendectomy group) and in 37.6% (64/170), an interval appendectomy was performed (interval appendectomy group). Median follow-up was 80 weeks (17–192) and 113 weeks (34–246), respectively. Most frequent reason to perform subsequent surgery was recurrent appendicitis (45% (29/64)). Increasing age was significantly associated with a lower risk of undergoing interval appendectomy (OR 0.7; CI 0.6–0.89); p = 0.002). In the interval appendectomy group, appendicular neoplasm was found in 11% (7/64) of the patients, in contrast to 1.5% (25/1669) of the patients that had acute surgery (p < 0.001). Conclusions: One out of three patients non-operatively treated for complicated appendicitis required an interval appendectomy. The incidence of appendicular neoplasms was high in these patients compared with those that had acute surgery. Therefore, additional radiological imaging following non-operatively treated complicated appendicitis is recommended. [ABSTRACT FROM AUTHOR]

Although appendiceal tumours are rare, they may be encountered unexpectedly in any emergency abdominal operation. Many of these tumours are not recognized intraoperatively and are diagnosed only during formal histopathological analysis of an appendectomy specimen. We present a rare case of appendiceal adenocarcinoma which caused acute bowel ob struction. The patient presented with abdominal pain, distension and constipation. Abdominal radiography showed large bowel obstruction. On laparotomy the appendix was abnormal, with a tumor growing in to the ileal loop and creating a bowel obstruction. An appendectomy was performed with enbloc bowel segment resection and end ileostomy. Pathology specimens showed that the primary neoplasm was the appendiceal mucinous adenocarcinoma infiltrating the ileal loop. Patient underwent a right hemicolectomy, and recovered afterwards with no evidence of local recurrence or metastatic disease as confirmed by the standard follow-up. Physicians should keep in their minds that appendiceal neoplasm may have various and nonspecific presentations, but only an accurate diagnosis will lead to correct patients treatment, healing and long-term survival.