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Pembrolizumab and chemotherapy (chemoimmunotherapy) were administered to 2 head and neck squamous cell carcinoma (HNSCC) patients with extremely advanced local tumors and distant metastases with palliative intent. However, they demonstrated strikingly good responses and achieved remission. Expanded application of induction chemoimmunotherapy may be useful for locally advanced HNSCC.

Human papillomavirus (HPV)-related oropharyngeal small-cell carcinoma (OPSmCC) is a rare malignancy with aggressive behavior, whereas HPV-related oropharyngeal squamous-cell carcinoma (OPSqCC) displays a favorable prognosis. Notably, these two malignancies occasionally arise in an identical tumor. In this case study, we explored the molecular characteristics that distinguishes these two carcinomas using a rare case of HPV-related oropharyngeal carcinoma (OPC) with the combined histology of SmCC and SqCC. Immunohistochemical analysis and HPV-RNA in situ hybridization (ISH) suggested that both SmCC and SqCC were HPV-related malignancies. Targeted exome sequencing revealed that SmCC and SqCC had no significant difference in mutations of known driver genes. In contrast, RNA sequencing followed by bioinformatic analyses suggested that aberrant transcriptional programs may be responsible for the neuroendocrine differentiation of HPV-related OPC. Compared to SqCC, genes up-regulated in SmCC were functionally enriched in inflammatory and immune responses (e.g., arachidonic acid metabolism). We then developed a SmCC-like gene module (top 10 up-regulated genes) and found that OPC patients with high module activity showed poor prognosis in The Cancer Genome Atlas (TCGA) and GSE65858 cohort. Gene set enrichment analysis of the SmCC-like gene module suggested its link to MYC proto-oncogene in the TCGA data set. Taken together, these findings suggest that the SmCC-like gene module may contribute to acquisition of aggressive phenotypes and tumor heterogeneity of HPV-related OPC. The present case study is the first report of genetic and transcriptomic aberrations in HPV-related OPSmCC combined with SqCC.

Spindle cell carcinoma of the head and neck is a rare neoplasm. We at Kyushu Cancer Center experienced 6 cases of spindle cell carcinoma which accounted for 0.9% of all cases of head and neck squamous cell carcinoma. These cases presented with the characteristic clinical presentation, such as a particular form (polypoid and exophytic) and difficulty of pathological diagnosis. For treatment, surgery was performed in the main, but in one case of hypopharyngeal cancer chemoradiotherapy was undertaken. Spindle cell carcinoma exhibits a poor prognosis, compared with the other squamous cell carcinomas. However for the moment, 4 of 6 cases are surviving, and disease free. We will require long-term monitoring of these cases.

Definitive concomitant chemoradiotherapy (CRT) with high-dose cis-platinum (CDDP) is a current standard protocol for advanced laryngeal and hypopharyngeal cancer sparing surgery for salvage. However, this modality is associated with limited feasibility and frequent sever toxicities. In the present study, a ‘chemoradioselection’ protocol with minimal toxicity was developed using initial response to CRT as a biomarker for patient selection. Between 2000, March and 2012, September 123 patients with stage III (44), IV (79) laryngeal (64) and hypopharyngeal carcinoma (59) excluding T4 cases were enrolled to this protocol. Two cycles of split (15 mg/m2 ×5 days, 2000–2008) or bolus (80 mg/m2, 2009-present) CDDP was concurrently administered. Tumor responses were evaluated after 40 Gy of CRT and 64 responders (chemoradioselected, CRS) received further CRT up to 70 Gy, while radical surgery was recommended for the 59 non-responders (N-CRS), and 34 underwent surgery (N-CRS-ope). The remaining 25 patients who refused surgery (N-CRS-refu) were treated with continuous CRT. The 5-year overall survival (OS) and disease-specific survival (DSS) were 67, and 77%, respectively. The CRS demonstrated favorable 5-year OS (73%) and laryngo-esophageal dysfunction-free survival (LEDFS, 69%) rates. In contrast, the N-CRS-refu showed significantly lower 5-year OS (47%) compared with CRS (73%) and N-CRS-ope (70%) (P=0.0193), and significantly lower 5-year LEDFS (20%) compared with the CRS (69%) (P

Background: When a head and neck tumor invades the upper lateral mediastinum, the transmanubrial approach (TMA), in which the sternoclavicular joint is temporary mobilized and replaced back to the physiological position, appears to be an excellent method. However, there have been only a few reports about the application of this approach to head and neck tumors. Materials and Methods: We recently adopted this technique for the removal of 2 head and neck tumors that required handling of the subclavian and innominate veins around the venus angle. Results: We could safely remove the tumors under good surgical view and obtained excellent cosmetic and functional results. Conclusions: TMA is a useful technique for the removal of head and neck tumors, which invade the upper lateral mediastinum. More frequent applications of this method are encouraged in combination with head and neck tumor surgery.

Background Current organ-preserving dose-intensified modalities have apparently reached the limit of human tolerance. To optimize the therapeutic ratio, we evaluated the utility of a chemoradioselection strategy for the treatment of advanced hypopharyngeal carcinoma. Methods Fifty-five patients with advanced hypopharyngeal carcinoma were enrolled in our algorithm-based protocol. After 40 Gy of concurrent chemoradiation therapy (CCRT), patients who were chemoradioselected (chemoradioselected group, complete response [CR] at the primary site) received further 30 Gy of CCRT up to 70 Gy, whereas the remaining nonchemoradioselected (nonchemoradioselected group) patients underwent radical surgery. Results Based on this algorithm, 27 patients were chemoradioselected and 28 nonchemoradioselected. The 5-year cumulative disease-specific and overall survival (OS) rates were 76% and 65%, respectively. The chemoradioselected group demonstrated favorable laryngoesophageal dysfunction-free survival (77% at 3 years). Conclusion Although preliminary, our results indicate that algorithm-based chemoradioselection may provide a novel platform for improving the treatment of advanced hypopharyngeal carcinoma by providing the complete advantages of CCRT and radical surgical resection. © 2014 Wiley Periodicals, Inc. Head Neck 37: 1290–1296, 2015

Basal cell nevus syndrome is an autosomal dominant disorder characterized by the developmental malformations and its carcinogenic nature. This syndrome shows various symptoms of multiple cutaneous basal cell carcinoma, ketatocystic odontogenic tumors, and inborn abnormalities in the bone and skin. Although basal cell nevus syndrome itself is a rare disorder, we experienced a very rare case in which squamous cell carcinoma of the oral cavity developed, and not cutaneous basal cell carcinoma. Only 4 similar cases have been reported in the English literature. The patient was a 33-year-old woman. She was diagnosed as having squamous cell carcinoma of the hard palate, and basal cell nevus syndrome in our hospital. The patient underwent surgery for squamous cell carcinoma of the hard palate, with postoperative chemoradiothetrapy. Since patients with this syndrome tend to form basal cell carcinoma when exposed to X-ray radiation, we perform radiotherapy with care.

Aims In this study, we aimed to investigate the molecular mechanisms underlying the development of mucoepidermoid carcinoma (MEC). Methods and results In 31 cases, we examined the MAML2 fusion status using reverse transcriptase–polymerase chain reaction, and HER2 and EGFR status using immunohistochemistry and chromogenic in-situ hybridization. MAML2 fusions were detected in 15 (57.7%) of 26 MECs analysed, including 11 of 16 (68.8%) low-grade, two of four (50%) intermediate-grade and two of six (33.3%) high-grade MECs. HER2 gene amplification and an increased EGFR gene copy number (with balanced chromosome 7 high-polysomy) were each detected in four of 28 (14.3%) MECs analysed. Irrespective of MAML2 fusion status, all seven high-grade MECs had an increased gene copy number of either HER2 or EGFR, in a mutually exclusive manner, whereas such abnormalities were extremely rare in low- and intermediate-grade MEC. Conclusions These results suggest that HER2 or EGFR gene abnormality could play an important role in the development of high-grade MEC, and also in the progression from MAML2 fusion-positive low-/intermediate-grade to high-grade in a subset of MEC. Furthermore, we suggest that high-grade MEC comprises a heterogeneous group of tumours in terms of molecular pathogenesis, in particular MAML2 fusion status.

Background Advanced head and neck squamous cell carcinomas frequently develop distant metastases to limited organs, including the lungs, bone, mediastinal lymph nodes, brain, and liver. Peritoneal carcinomatosis as an initial distant metastasis from hypopharyngeal squamous cell carcinoma is quite rare. Case presentation A 75-year-old man diagnosed with hypopharyngeal squamous cell carcinoma and his clinical stage was determined as T2N2cM0. Notably, the right retropharyngeal lymph node surrounded more than half of the right internal carotid artery. Concomitant conformal radiation therapy was administered for the primary hypopharyngeal lesion, and the whole neck and tumor response was evaluated at this point according to our algorithm-based chemoradioselection protocol. As the tumor responses at both the primary and lymph nodes were poor, with the right retropharyngeal lymph node in particular demonstrating mild enlargement, we performed a radical surgery: pharyngolaryngectomy, bilateral neck dissection, and reconstruction of the cervical esophagus with a free jejunal flap. Then, postoperative CRT was performed. During these therapies, the patient developed a fever and mild abdominal pain, which was associated with an increased C-reactive protein level. Contrast-enhanced computed tomography from the neck to the pelvis demonstrated mild peritoneal hypertrophy and ascites with no evidence of recurrent and/or metastatic tumor formation. We initially diagnosed acute abdomen symptoms as postoperative ileus. However, cytological examination of the refractory ascites resulted in a diagnosis of peritoneal carcinomatosis. Owing to rapid disease progress, the patient died 1.5 months after abdominal symptom onset. Conclusions The present case is the second reported case of head and neck squamous cell carcinoma with peritoneal carcinomatosis as an incipient distant metastasis. Therefore, peritoneal carcinomatosis should be considered a differential diagnosis when acute abdomen is noted during treatment for head and neck cancers.

Tumor thrombosis of the internal jugular vein (IJV) is an extremely rare disease, and the reported cases have been exclusively associated with differentiated thyroid cancer. In the present study, we describe two cases of IJV tumor thrombosis originated from squamous cell carcinoma (SCC), which is the first case report.Case 1 was a 67-year-old man diagnosed with advanced supraglottic SCC with a massive tumor thrombus in the IJV. He was treated with bio-radiotherapy followed by radical surgery. Case 2 was a 65-year-old woman who underwent radical surgery for SCC of thyroid with tumor thrombosis in the IJV.These cases rapidly developed local recurrences and distant metastases and died within 10 months after surgery.IJV tumor thrombosis originated from SCC apparently reflects extremely aggressive state of the tumor. Recognition and precaution to this condition is essential for the development of a clinically effective treatment strategy.

The treatment outcomes of patients with esophageal squamous cell carcinoma (ESCC) and head and neck squamous cell carcinoma (HNSCC) have been poorly documented. We investigated 50 patients with synchronous and metachronous ESCC and HNSCC. We focused on the treatment results of 20 patients with synchronous ESCC and HNSCC who received simultaneous chemoradiotherapy (CRT). There were 34 patients (68.0 %) with stage 0–I ESCC and 40 patients (80.0 %) with stage II–IV HNSCC. A total of 13 (26.0 %) patients underwent endoscopic mucosal resection and 28 (56.0 %) underwent CRT for ESCC, and 35 (70.0 %) of the patients with HNSCC were treated with CRT. The 5-year overall survival rates of the 50 patients with synchronous and metachronous ESCC and HNSCC was 57.8 %. For the 20 patients with synchronous ESCC and HNSCC who received simultaneous CRT, the CRT was completed in 19 (95.0 %) patients. Although grade 3–4 adverse events were observed in five (25.0 %) patients, there were no therapy-related deaths. Complete responses (CRs) of both ESCC and HNSCC were observed in ten (50.0 %) patients. The 5-year overall survival rate of the 20 patients was 60.0 %. CRs of both ESCC and HNSCC were obtained in seven (58.3 %) patients by using a cisplatin/5-FU regimen (n = 12), and in the other three (37.5 %) patients by a platinum-based monotherapy regimen (n = 8). The surveillance of double cancer and the use of radical treatment contributed to the favorable outcome of the patients with ESCC and HNSCC. The optimal chemotherapy regimen for simultaneous CRT remains to be determined.

Hashimoto K, Yamamoto H, Shiratsuchi H, Nakashima T, Tamiya S, Nishiyama K, Higaki Y, Komune S, Tsuneyoshi M & Oda Y (2012) Histopathology 60, E131–E142 neu gene amplification in carcinoma ex pleomorphic adenoma in relation to progression and prognosis: a chromogenic in-situ hybridization study Aims: The aim of this study was to investigate the potential role of HER-2/neu in the stepwise progression of carcinoma ex pleomorphic adenoma (CXPA) and to evaluate its prognostic significance in CXPA. Methods and results: We examined HER2 overexpression and HER2 amplification by immunohistochemistry and chromogenic in-situ hybridization in 31 cases of CXPA with ductal differentiation (eight intraductal, five intracapsular, and 18 extracapsular) and seven cases of atypical pleomorphic adenoma (PA). HER2 overexpression and HER2 amplification were found in 17 (54.8%) and 12 (38.7%) of the 31 CXPA cases, respectively. HER2 amplification was more prevalent in extracapsular CXPAs (9/18 cases; 50%) than intracapsular CXPAs (1/5 cases; 20%), intraductal CXPAs (2/8 cases; 25%), or atypical PAs (0/7 case; 0%). The status of HER2 amplification was essentially retained from the intraductal to the extracapsular component in individual extracapsular CXPAs. In addition, HER2 amplification was significantly associated with a worse prognosis (shorter disease-free survival time and shorter overall survival time) among extracapsular CXPAs (each P

多形腺腫由来癌では腺腫被膜を基準とした組織学的進展度が予後因子として有用であることが知られているが，現行のTNM分類において，唾液腺腫瘍のT因子には被膜浸潤の程度は反映されていない。今回，多形腺腫由来癌31例において組織学的進展度を評価し，予後予測因子としての有用性に関してT分類との比較検討を行った。pT1，2症例中25%，50%は組織学的に被膜外浸潤癌であり，それぞれ25%，30%で術後遠隔転移を，25%，20%で腫瘍死を認めた。一方でpT3症例の41.7%は非浸潤癌であり，術後再発転移を認めなかった。さらに腫瘍径や術後治療の有無に関わらず，組織学的進展範囲が微小浸潤までに止まる症例は予後良好であり，全生存率，無再発生存率に関してT分類と比較してより有効に予後を反映していた。多形腺腫由来癌の治療に際しては，組織学的進展度評価に基づいた術後補助療法選択や経過観察が必要であると考えられる。

TS-1® is an oral anticancer drug composed of tegafur which is a derivative of 5FU and 5-chloro-2,4-dihydroxypyridine (CDHP) and oxonic acid. We report on a patient with acute toxicosis who orally ingested a large dose of TS-1® 1400 mg in an effort to commit suicide. First of all, we treated him with gastric lavage, laxative and hydration. After that, he underwent hemodialysis. Before hemodialysis the blood concentration of tegafur was 25200 ng/mL, 5-FU was 3000 ng/mL and CDHP was 1870 ng/mL. These blood concentrations were high, compared with cases where 50 mg of TS-1® has been ingested. After the 2nd hemodialysis, all blood concentrations decreased to the normal level, so the patient was saved without severe side effects. To our knowledge, there has been no report of a case involving ingestion of a large dose of TS-1®, and we therefore report our experience of this rare case.

Pleomorphic adenoma (PA) is known to occasionally progress to carcinoma, but the mechanisms of its malignant transformation have not been fully elucidated. S100P, an EF-hand calcium-binding protein, has recently been proposed as an initiator of carcinogenesis in some kinds of epithelial tumors. In this study, we aimed to elucidate the potential role of S100P in tumorigenesis and stepwise progression of carcinoma ex pleomorphic adenoma (CXPA) with ductal differentiation. In 31 ductal type CXPAs (8 in situ, 5 intracapsular, and 18 extracapsular) and 28 PAs (21 conventional and 7 atypical) of the salivary gland, we examined the protein expression of S100P, androgen receptor (AR), HER2/neu, p53, and Ki-67 by immunohistochemistry. HER2 expression, p53 expression, and the Ki-67 labeling index were higher in CXPAs than in atypical PAs and conventional PAs, whereas the AR expression level was relatively high even in atypical PAs. S100P overexpression was significantly more prevalent in CXPAs (27 cases; 87.1%) than in atypical PAs (2 cases; 28.6%) and conventional PAs (1 case; 4.8%) (P

当科では上顎洞扁平上皮癌に上顎試験開洞減量術と浅側頭動脈経由の動注化学放射線治療および根治手術をあわせた集学的治療を施行している。今回この治療の有効性を検証するために1997年1月から2007年12月までの上顎洞扁平上皮癌37症例につき，死因特異的3年生存率，再発率を検討した。生存率はT3症例で89%，T4a症例で66%，T4b症例で29%であった。動注化学放射線治療を施行し一次根治を得られた28例の原発巣再発率はT3症例は0%で，T4a症例は44%，T4b症例は67%であった。原発巣再発後の制御率はT4a症例で43%，T4bは0%であり，T4症例における原発巣再発をさらに減じうる集学的治療の確立が重要であると考えた。

同一の切除範囲や同一の再建皮弁における構音機能を検討するために，舌可動部半切術，大胸筋皮弁による再建術を行った症例で術後6ヵ月以上経過している9例を対象とし，皮弁の形状分類と，舌の可動性の評価を行い，これらと発語明瞭度との関連を検討した．その結果，発語明瞭度は隆起型71.6％，平坦型84.4％，陥凹型34.1％であり，陥凹型は低い傾向を示した．舌の可動性は，前方可動性，側方可動性ともに，隆起型では発語明瞭度と相関する傾向を認めたが，陥凹型では相関しなかった．皮弁の形状が舌の可動性よりも発語明瞭度に与える影響が大きい可能性があり，皮弁の形状は平坦型以上の隆起が必要と考えられた．

In treatment of squamous cell carcinoma of the mouth floor, we reviewed 26 cases-25 men and one woman from 38 to 83 years old-treated from January 1997 to January 2006 in our institution. Three-year survival rate was 88% in all cases, 100% in stages I and II, and 67% in stages III and IV. Overall sites recurrence was 38%, 17% in primary recurrence, 13% in cervical recurrence, and 8% in distant metastasis. Primary recurrence was salvaged 25% of patients and cervical recurrence, 67%, respectively. In non-operative cases for the neck, cervical recurrence was 8% and salvaged by neck dissection, so we concluded that elective neck dissection was not necessary.

当科で一次治療を行った上咽頭癌38例の治療成績を検討し予後因子の解析を行った。上咽頭癌全体の治療成績は，疾患特異的3年生存率（以下3生率）が50%，3年局所・所属リンパ節制御率が58%と不良であった。年齢別の検討では高齢になるに従い生存率は低下傾向にあったが有意差はなかった。原発巣（以下T）別でみても生存率に有意差はなくTが進行するに従い局所・所属リンパ節制御率が低下する傾向も認めなかった。頸部リンパ節（以下N）別ではNが進行するに従い生存率・制御率ともに低下傾向にあったが有意差はなかった。病期別でも生存率に有意差はなかった。一方組織別でみるとWHO type 1はtype 2・3にくらべ有意差はないものの生存率が低い傾向にあり，局所・所属リンパ節制御率はtype 1が有意に低かった。以上の解析から，年齢・T・N・病期・組織型の中に予後不良因子はなかったが，組織型WHO type 1の局所・所属リンパ節制御率は有意に不良であるという結果となった。

進行舌扁平上皮癌の治療成績向上を目的とし，1997年以降当科では術前動注化学放射線治療および根治手術をあわせた集学的治療を施行している。今回その治療法の有効性を検証するために1997年1月から2005年12月までの進行舌扁平上皮癌症例につき，治療法の違いによる死因特異的生存率，再発率を検討した。生存率は集学的治療例の病期IIIは86%，病期IVでは68%であり，それ以外の治療が行われた症例はそれぞれ80%，50%であり，有意差は認めなかったが，集学的治療症例のほうが良い傾向であった。また一次根治症例の原発巣，頸部再発では集学的治療例は22%であったが，それ以外の治療が行われた症例では55%であり，両者に有意差はないものの集学的治療例のほうが少ない傾向にあった。また集学的治療で一次根治できた病期III症例は術後治療の有無に関係なく原発巣，頸部再発は認めなかったが，集学的治療で一次根治できた病期IV症例は術後治療を行っていても原発巣，頸部再発を30%に認め，術後治療内容の変更を考慮すべきであると考えた。

Background At our institute, a chemoradioselection strategy has been used to select patients for organ preservation on the basis of response to an initial 30–40 Gy concurrent chemoradiotherapy (CCRT). Patients with a favorable response (i.e., chemoradioselected; CRS) have demonstrated better outcomes than those with an unfavorable response (i.e., nonchemoradioselected; N-CRS). Successful targeting of molecules that attenuate the efficacy of chmoradioselection may improve results. Thus, the aim of this study was to evaluate the association of a novel cancer stem cell (CSC) marker, CD44 variant 9 (CD44v9), with cellular refractoriness to chemoradioselection in advanced head and neck squamous cell carcinoma (HNSCC). Materials and Methods Through a medical chart search, 102 patients with advanced HNSCC treated with chemoradioselection from 1997 to 2008 were enrolled. According to our algorithm, 30 patients were CRC following induction CCRT and 72 patients were N-CRS. Using the conventional immunohistochemical technique, biopsy specimens and surgically removed tumor specimens were immunostained with the anti-CD44v9 specific antibodies. Results The intrinsic expression levels of CD44v9 in the biopsy specimens did not correlate with the chemoradioselection and patient survival. However, in N-CRS patients, the CD44v9-positive group demonstrated significantly (P = 0.008) worse prognosis, than the CD44v9-negative group. Multivariate analyses demonstrated that among four candidate factors (T, N, response to CCRT, and CD44v9), CD44v9 positivity (HR: 3.145, 95% CI: 1.235–8.008, P = 0.0163) was significantly correlated with the poor prognosis, along with advanced N stage (HR: 3.525, 95% CI: 1.054–9.060, P = 0.0228). Furthermore, the survival rate of the CD44v9-induced group was significantly (P = 0.04) worse than the CD44v9-non-induced group. Conclusions CCRT-induced CD44v9-expressing CSCs appear to be a major hurdle to chemoradioselection. CD44v9-targeting seems to be a promising strategy to enhance the efficacy of chemoradioselection and consequent organ preservation and survival.

A retrospective review of 145 previously untreated patients with squamous cell carcinoma (SCC) of the tongue was performed. All these cases were with no regional and distant metastasis. They were treated in the Kyushu Cancer Center between March 1972 and July 1998, and received interstitial irradiation, an operation, or an operation or interstitial irradiation after arterial infusion chemotherapy via superficial temporal artery combination external irradiation as initial treatment for primary lesion (tongue). The scope of external irradiation included the submandibular nodes and the upper jugular nodes. They did not receive prophyiactic neck dissection except the cases requiring reconstruction of the tongue and floor of the mouth. The five-year survival rate (5YSR) calculated by the Kaplan-Meier method was 82%. Recurrence occurred in 59 patients, of which 21 cases were local, 37 cases were regional and one case was distant recurrence. The 5YSR of local recurrence cases was 61%, that of regional recurrence cases was 56%, and that of distant recurrence cases was 0%. Neck dissection was performed for 35 patients of 37 regional recurrence cases, of which 31 patients were salvaged and 4 patients were uncontrollable. The regional control rate by neck dissection after regional recurrence was 89%. The N stage of the uncontrollable 4 patients was more than N2b. These results suggest that the early detection of regional recurrenceis important.

Background: Definitive concomitant chemoradiotherapy (CRT) with high-dose cis-platinum (CDDP) is a current standard protocol for advanced laryngeal and hypopharyngeal cancer sparing surgery for salvage. However, this modality is associated with limited feasibility and frequent sever toxicities. We have developed a “chemoradioselection” protocol with minimal toxicity using initial response to CRT as a biomarker for patient selection. Materials and Methods: From 2000 to 2012, 123 patients with stage III (44), IV (79) laryngeal (64) and hypopharyngeal carcinoma (59) excluding T4 cases were enrolled to this protocol. Two cycles of split (15 mg/m2 x 5 days, 2000-2008) or bolus (80 mg/m2, 2009-present) CDDP was concurrently administered. Results: Tumor responses were evaluated after 40 Gy of CRT and 64 responders (i.e., chemoradioselected, CRS) received further CRT up to 70 Gy, while radical surgery was recommended for the 59 non-responders (N-CRS), and 34 underwent surgery (N-CRS-ope). The remaining 25 patients who refused surgery (N-CRS-refu) were treated with continuous CRT. The 5-yr overall survival (OS) and disease-specific survival (DSS) were 67% and 77%, respectively. The CRS demonstrated quite favorable 5-yr OS (73%) and 5-yr laryngo-esophageal dysfunction-free survival (LEDFS, 69%). In contrast, the N-CRS-refu showed significantly (P = 0.0193) lower 5-yr OS (47%) than CRS (73%) and N-CRS-ope (70%), and significantly (P < 0.0001) lower 5-yr LEDFS (20%) than the CRS (69%). On multivariate analyses including T, N, primary site, and planned treatment (CRS + N-CRS-ope) or not (N-CRS-refu), unplanned treatment alone showed a significant correlation with poor OS (Hazard ratio [HR]: 2.584, 95% CI: 1.313–4.354, P = 0.007). Conclusions: Chemoradioselection reflects the biological aggressiveness of each tumor, and can segregate patients for functional laryngeal preservation with moderate intensity CRT (150-160 mg/m2 of CDDP) from those who would be better treated with surgery. This strategy may be useful for the optimization of the therapeutic intensity. Citation Format: Muneyuki Masuda, Satoshi Toh, Hidefumi Rikimaru, Naonobu Kunitake, Yuichiro Higaki. Utility of chemoradioselection for the optimization of treatment intensity in advanced hypopharyngeal and laryngeal carcinoma [abstract]. In: Proceedings of the AACR-AHNS Head and Neck Cancer Conference: Optimizing Survival and Quality of Life through Basic, Clinical, and Translational Research; April 23-25, 2017; San Diego, CA. Philadelphia (PA): AACR; Clin Cancer Res 2017;23(23_Suppl):Abstract nr 15.