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Undifferentiated pleomorphic sarcoma (UPS) in the gastrointestinal tract is rare. According to the diagnostic criteria after the World Health Organization 2013 reclassification, there has been only one case of UPS with perforation of the gastrointestinal tract. A 71-year-old man who was undergoing outpatient chemotherapy at the department of respiratory medicine of our hospital for lung cancer and brain metastasis, was admitted to our hospital with sudden high fever and abdominal pain. A computed tomography scan showed free air in the abdominal cavity with thickening of part of the jejunal wall. We suspected jejunal metastasis of lung cancer and performed emergency surgery for acute peritonitis due to gastrointestinal perforation in the same area. A Bormann type 2 tumour was found in the jejunum with perforation. The histopathological diagnosis was UPS. Ten months have passed since the surgery, and there has been no recurrence of UPS and no significant change in lung cancer. Primary UPS of the gastrointestinal tract is rare, and cases with perforation are extremely rare. Currently, ten months have passed since the surgery, and no recurrence has been observed. We encountered a case of UPS in which it was difficult to distinguish metastasis from lung cancer to the jejunum, and the emergency surgery gave us the chance to confirm the definitive diagnosis and save the patient's life.

Background Barrett's esophagus (BE) is characterized by presence of columnar epithelium in the lower esophageal mucosa, which originally comprises stratified squamous epithelium. Gastroesophageal reflux disease causes BE and BE adenocarcinoma (BEAC); further, the incidence of BEAC is increasing, especially in developed countries. Long-segment BE (LSBE) has a particularly high carcinogenic potential and necessitates treatment, surveillance, and prevention. Case presentation Herein, we report three cases of BEAC originating from LSBE larger than 15 cm. All three patients underwent surgery for the diagnosis of BEAC. A 66-year-old man with advanced esophageal cancer underwent neoadjuvant chemotherapy and subsequent subtotal esophagectomy. The postoperative pathological diagnosis was of poorly differentiated adenocarcinoma with lymph node metastasis (pT3 pN3 pM0 pStage III based on the Union for International Cancer Control TNM Classification 8th edition). Two years after the operation, the patient was diagnosed with recurrence around the celiac artery and underwent chemotherapy. An 83-year-old woman with advanced esophageal cancer underwent subtotal esophagectomy. The postoperative pathological diagnosis was of well-differentiated adenocarcinoma with supraclavicular lymph node metastasis (pT3 pN3 pM1 pStage IV). Two months after the operation, the patient was diagnosed with recurrence in the neck lymph nodes and underwent chemotherapy; however, she died. A 66-year-old man with early-stage esophageal cancer underwent subtotal esophagectomy. A superficial early cancerous lesion was seen over BE. The postoperative pathological diagnosis was of well-differentiated adenocarcinoma without lymph node metastasis (pT1a pN0 pM0 pStage 0). The patient was found to be alive and recurrence-free 3 months after the operation. Conclusions BEAC might show good prognosis if detected and treated early. Extremely LSBE is associated with a high incidence of BEAC; therefore, early detection and treatment with close surveillance is essential.

Background Although there are many studies on primary esophageal adenocarcinoma arising from Barrett's esophagus or ectopic gastric mucosa, reports on adenocarcinoma arising from esophageal cardiac glands are extremely rare. Herein, we report a case of mid-thoracic cancer antigen 19-9 (CA 19-9)-producing primary esophageal adenocarcinoma, which presumably originated from the cardiac glands. Case presentation A 74-year-old man was referred to our department with advanced esophageal cancer, which initially presented with dyspepsia. Serum levels of cancer antigen 19-9 (CA 19-9) were elevated (724.89 U/ml). Upper gastrointestinal endoscopy revealed a type 2 tumor on the posterior wall of the mid-thoracic esophagus approximately 29–32 cm from the incisor. Mucosal biopsy was consistent with a diagnosis of adenocarcinoma. Contrast-enhanced computed tomography showed a circumferential wall thickening in the mid-thoracic esophagus without enlarged lymph nodes or distant metastasis. Positron emission tomography–computed tomography showed accumulation in the primary tumor, but no evidence of lymph node or distant metastasis. According to these findings, the adenocarcinoma was staged as cT3N0M0, thereby, requiring subtotal esophagectomy with lymph node dissection. Postoperative course was uneventful. Histopathologic analysis revealed a 50 × 40 mm moderately differentiated adenocarcinoma with invasion to the thoracic duct and lymph node metastasis at #108(1/4), #109R(1/3), and #109L(1/3). After surgery, the stage was revised to moderately differentiated pT4apN2pM0 (pStage III). Immunostaining revealed expression of CA19-9 and suggested esophageal cardiac gland origin of the tumor. Three months after the surgery, the patient showed no recurrence and is undergoing outpatient observation. Conclusions We experienced a case of mid-thoracic CA19-9-producing primary esophageal adenocarcinoma, which was presumed to have originated in the esophageal cardiac glands. Due to the scarcity of studies regarding this condition, specific management needs to be further clarified.

Background The number of patients with esophagogastric junction (EGJ) cancers has tended to increase. However, no clear consensus on the optimum treatment policy has yet been reached. Methods This study included patients diagnosed with adenocarcinoma of Sievert type II in whom resection was performed in our hospital. We performed a clinicopathological examination, and patients were divided into two groups by the tumor size: L group, tumor size ≥4 cm; and S group, tumor size Results A total of 48 patients were diagnosed with ECJ cancers. The average tumor size was 55.1 mm, and 32 cases (66.7%) had tumors ≥4 cm. Metastasis to the mediastinum was noted in 4 cases (12.5%) in the L group but none in the S group. Recurrence in the upper or middle mediastinum lymph nodes was noted in 3 cases (9.4%) in the L group. The 5-year overall survival rates were 49.7 and 83.9% in the L and S groups, respectively. Conclusions As the tumor grows large, it is difficult to accurately judge EGJ on the image, and as a result it is difficult to understand the exact esophageal invasion distance of the tumor. Therefore, lymph node dissection including the upper mediastinum is considered vital, regardless of the degree of esophageal invasion.

A 66-year-old man was diagnosed with advanced esophagogastric junction cancer and referred to our institution (Department of Gastroenterological Surgery, Chiba Cancer Center) for treatment. Computed tomography imaging confirmed the presence of a tumor, extending from the lower thoracic esophageal to the esophagogastric junction, with swelling of the upper mediastinal lymph nodes. Based on the criteria of the International Union against Cancer Committee (UICC, 8th Edition), the staging was confirmed as follows: 101R, 107 and 106 pre. Based on these findings, a clinical diagnosis of EGJ cancer was made, with a UICC 8th classification of cT3N1M0 c-stage-III. Preoperative chemotherapy was performed, with tumor shrinkage obtained after three courses of chemotherapy (using S-1 plus oxaliplatin). Subsequently, esophagectomy with three-field lymph node dissection and gastric tube reconstruction, via the intrathoracic route, was performed. On postoperative day 2, the patient developed an idiopathic pneumothorax, with brown-green drainage from the chest tube. A repeat thoracotomy was performed, confirming the presence of brown-green pleural fluid and necrosis of esophageal tissue. The area of necrosis was situated 4 cm on the oral side of the anastomosis, with greater necrosis of the right than left side. There was no evidence of necrosis of the gastric tube. The necrotic residual esophagus was excised and reconstructed, as an external fistula on the left side of the neck. On day 38, after the second surgery, reconstruction of the esophageal conduit and gastric tube, via the jejunum, was performed. At 7 months after discharge, the patient was symptom free, with no evidence of cancer recurrence.

Background Salvage surgery for esophageal cancer (squamous cell carcinoma) patients with locoregional failure after definitive chemoradiotherapy (dCRT) is high risk, and no surgical consensus has been established. We evaluated our 2 procedures of salvage surgery for failure which was confirmed by GS, CT, and PET: [SE] esophagectomy followed by reconstruction for patients ≤ 80 yo, without cT4 at the initial presentation, and whose recurrent/residual tumor can be removed as a R0 resection, and [SL] dissection of only metastatic abdominal lymph nodes for patients without any other failure. Methods All patients received dCRT ≥ 50 Gy followed by salvage surgery. In 17 patients who underwent SE from 2009 to 2014, prophylactic dissection of cervical or 106 tbL nodes was often omitted, poststernal route was preferred, LigasureTM was routinely used, and aggressive nutritional intervention with enteral nutrition was perioperatively supplied. In SL for 5 patients until 2016, No. 3 and 7 nodes were removed. Results [SE] Sixteen patients received R0 resection. Postoperative complications were noted in 6 patients (35%), and pleural effusion was the most common (24%). However, neither anastomotic leakage nor in-hospital death developed. Median overall survival (OS) time is 44 months, and provisional 5-year OS rate is 41%. While 7 patients died of esophageal caner, one died from another caner and 3 died from other illness. Tentative 5-year disease-free survival (DFS) rate is 54%. Between cases with relapse after CR and cases with residual tumor, no significant difference was found in postoperative recurrence (2/8 vs. 5/9, P = 0.33) and survival (provisional 5-year OS rate: 50 vs. 33%, P = 0.45/provisional 5-year DFS rate: 70 vs. 40%, P = 0.22), while the relapsed patients after CR showed a little better outcome. [SL] Three patients have no relapse for 60/36/18 months after SL. One developed bone metastasis in 54 months after SL. One patient developed repeated abdominal recurrence and underwent SL again. Conclusion SE can be safely performed with strict planning, secure surgery and appropriate perioperative care. SL can also be beneficial as a less invasive salvage surgery to selected patients. Strict decision-making and appropriate postoperative follow-up method with attention to other diseases should be established based on further studies. Disclosure All authors have declared no conflicts of interest.

Background We tried integrated analysis of epigenomic information (Epigenomics) and image information (Radiomics) as Ragioepigenomics for esophageal cancer. Methods 1, Expression analysis of miR, evaluation as prognostic predictor (Epigenomics), 2, Image information analysis (Radiomics): a, Normalization of contrast CT images, feature quantities by 3D gray level co-occurrence matrix extraction. b, Normalization of SUV of FDG-PET image. Extraction of feature quantity by 3D gray level co-occurrence matrix. c, Image analysis of features. 3, Integrated analysis of Epigenomics and Radiomics information: We analyzed the relationship between miR expression level and variables obtained from image analysis. Results As a result of Cox regression by the selection method using elastic net, three variables were selected from contrast CT, and the results of both were consistent. Furthermore, when the survival curve and the log rank test were performed by the Kaplan-Meier method for the cluster shade high value group and the low value group, a significant difference was observed in the 2 groups. Conclusion A multimodal approach so called Radioepigenomics, which is a system for analyzing molecular information from image analysis will be applied to future Precision Medicine. Disclosure All authors have declared no conflicts of interest.

症例は42歳，男性．歯状線より1.5cmの下部直腸に30mm大の2型腫瘍を認め，生検にて高分化腺癌であった．内肛門括約筋切除術（以下ISR），3群リンパ節郭清，transverse coloplasty，横行結腸人工肛門造設術を施行．病理組織検査では，高分化腺癌，固有筋層までの浸潤でリンパ節転移を認めなかった．術後21日目に退院し，1カ月目に注腸造影を施行しtransverse coloplasty部より骨盤内に造影剤の漏出を認めた．保存的に経過をみるも術後11カ月でも瘻孔の治癒を認めず術後15カ月目に大殿筋膜皮弁充填術を施行．この手術後12カ月目に注腸造影にて瘻孔閉鎖を確認し，人工肛門閉鎖術を施行した．現在人工肛門閉鎖後4年4カ月経過し，再発を認めず，排便機能も良好である．これまでにISR後の骨盤内瘻孔に対して大殿筋膜皮弁充填術を施行し治癒した報告例はなかった．大殿筋膜皮弁充填術は有用な術式であると考えられた．

症例は62歳，男性．胃体上部2型胃癌に対し，胃全摘術施行．術後UFTを1年間内服．胃切除後15カ月後，肝S4の6.0×5.0cmの肝転移に対し肝部分切除施行．術後，肝動注化学療法（5-Fu，ADM，MMC）施行．肝切除後26カ月後，右肺2.3×2.0cmの転移に対し，右肺部分切除施行．肺切除後90カ月たった現在無再発生存中である．異時性，単発の胃癌肝転移，肺転移症例に対しては切除により，治癒の可能性も十分あり，積極的に切除すべきと思われた．胃癌肝転移，肺転移ともに切除しえた症例の報告は少なく，今回5年以上の長期無再発生存の1例を経験したので，文献的考察を加えて報告する．

We report a case of carcinoma in a hyperplastic polyp in a 78-year-old female that was diagnosed before resection using a magnifying colonoscope. The patient presented with fecal occult blood and underwent total colonoscopy, which revealed a 12-mm sessile polyp in the cecum. When seen in magnified view, an irregularly shaped pit was evident at the center of the polyp that was distinct from the asteroid-type pits observed over most of the lesion. We diagnosed this lesion as a hyperplastic polyp with a carcinoma component. The patient underwent endoscopic mucosal resection, and histologic section revealed a well-differentiated intramucosal adenocarcinoma in the hyperplastic polyp. Hyperplastic polyps of the colon are regarded as benign, nonneoplastic lesions. Few have reported carcinomas in or with hyperplastic polyps, and most of those were diagnosed after resection and histologic investigation. The literature suggests a precise observation and consideration of resection for large solitary hyperplastic polyps in the right side of the colon, because the risk of malignancy is high. Magnifying colonoscopy is helpful for observing the surface in detail and for correctly diagnosing and managing the lesion.

真性多血症を合併した,胃・脾・肝同時切除例の麻酔を経験した.症例は64歳,男性,真性多血症の診断にて約7年間塩酸チクロピジンを投与されており,手術時の血算,凝固・線溶系はほぼ手術可能範囲内であった.術後は,脾摘の影響もあり,白血球数・血小板数の異常増加を認め,メシル酸ガベキサート,ヘパリンの予防投与,ヒドロキシカルバミド,塩酸チクロピジンの早期内服開始にてDICを予防し,血算も正常化した.また,血小板数の増加に伴い,偽高カリウム血症を認めた.血清カリウム,血清・血漿カリウムの差は,血小板数と相関し,また,採血後の経過時間とも相関すると推測された.

The use of minimally invasive surgery has become widely accepted in many gastrointestinal fields, even in patients with malignancy. However, performing laparoscopic resection for the treatment of hilar cholangiocarcinoma is still not universally accepted as an alternative approach to open surgery, and only a limited number of such procedures have been reported due to the difficulty of performing oncologic resection and the lack of consensus regarding the adequacy of this approach. Laparoscopy was initially limited to staging, biopsy and palliation. Recent technological developments and improvements in endoscopic procedures have greatly expanded the applications of laparoscopic liver resection and lymphadenectomy, and some reports have described the use of laparoscopic or robot-assisted laparoscopic resection for hilar cholangiocarcinoma as being feasible and safe in highly selected cases, with the ability to obtain an adequate surgical margin. However, the benefits of major laparoscopic surgery have yet to be conclusively proven, and carefully selecting patients is essential for successfully performing this procedure.