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A 69-year-old woman was admitted to our hospital because of abdominal pain. Abdominal CT revealed free air, so we performed an emergency operation. Although the perforation site could not be confirmed, pancreatic cancer invading the stomach, spleen, and transverse colon was found. As a splenic abscess and peritoneal dissemination were also found, we created a colostomy and placed drains. Although the postoperative course was good, the splenic abscess continuous with the tumor remained. We thought that early removal of the drain would be difficult, so chemotherapy was introduced while continuing drainage. Fortunately, the pancreatic cancer was controlled, and the abscess tended to shrink, so we removed the tube 137 days after the surgery. After that, we continued chemotherapy, but in the second year after the surgery, the liver metastasis acutely exacerbated and DIC also developed, resulting in cancer death. If surgical intervention is difficult, as in this case, chemotherapy may be considered as an option, keeping in mind the possibility of exacerbation of infection.The patient was a 57-year-old woman with Castleman's disease. The follow-up CT scans obtained during the treatment of Castleman's disease, detected a 15mm nodule in the right breast AC area, and the patient was diagnosed with breast cancer. Lymphadenopathy was noted on both sides of the axilla; however, it was considered to be due to Catsleman's disease. Mastectomy and sentinel lymph node biopsy were performed with preoperative diagnosis of cT1cN0M0, cStage Ⅰ. Rapid diagnosis of the sentinel lymph node during the operation showed a metastatic tumor measuring 3mm and axillary dissection was performed. However, no metastasis was found in the dissected lymph node, which was, therefore, considered as an enlargement due to Castleman's disease.A 69-year-old man was referred to our institute for the surgical resection of focal resistant peritoneal GIST during imatinib administration. He had been diagnosed with GIST of the small intestine with liver and peritoneal metastases, and imatinib treatment was initiated. Shortly after imatinib administration, the primary lesion perforated, and thus, partial resection of the small intestine was performed. Imatinib treatment was resumed after the first surgery, and he achieved partial response. However, computed tomography scans obtained 7 months after the first surgery showed focal progression, a peritoneal metastasis near the right kidney. Under the diagnosis of focally imatinib-resistant GIST, local resection of the metastatic tumor was performed. In this case, an exon 11 mutation of c-kit was noted initially. After the imatinib treatment, an additional point mutation was observed in exon 18 that caused resistance to imatinib. Therefore, imatinib treatment was reinitiated after the second surgery, and other metastases were well controlled. In case of GIST with multiple metastases, appropriate treatment should be selected based on the resistance of each lesion.A 64-year-old man presented with dysphagia. Esophagogastroduodenoscopy revealed a submucosal tumor of 52mm in size at the lower thoracic esophagus. Biopsy yielded a pathological diagnosis of c-kit-positive esophageal gastrointestinal stromal tumor(GIST). Ki20227 We started neoadjuvant therapy with imatinib to avoid excessive surgical invasion. After 6 months of treatment, CT revealed a reduction in tumor size to 27 mm. We performed laparoscopic lower esophagectomy, proximal gastrectomy, double-tract reconstruction, and complete tumor resection. Neoadjuvant imatinib therapy was effective for the esophageal GIST.A questionnaire survey on postoperative chemotherapy for colorectal cancer was conducted in 22 hospitals in Yamaguchi Prefecture. Adjuvant chemotherapy was performed in less then 95% of Stage Ⅲ cancer, and oxaliplatin(OX)combination therapy was selected depending on the risk of recurrence. However, the proportion of OX combination therapy was lower than that in other prefectures, which was 24% in Stage Ⅲa, 44% in Ⅲb, and 76% in Ⅲc. In addition, among the OX combination therapy regimens(FOLFOX or CAPOX), the proportion of FOLFOX administration was higher in Yamaguchi Prefecture than in other prefectures. In Stage Ⅱ, most hospitals set up high-risk factors for recurrence and underwent adjuvant chemotherapy. FU-based monotherapy was selected in 80% of hospitals. A few hospitals decided the requirement of OX combination therapy based on age alone. In Yamaguchi Prefecture, the indication of postoperative adjuvant chemotherapy for colorectal cancer was almost standard; however, the rate of administering OX combination therapy was low.A 66-year-old-man was hospitalizedfor the treatment of rectal cancer. Preoperative contrast-enhancedcomputedtomography revealedrectal cancer, left-sided inferior vena cava, and distant metastasis. He was diagnosed with cStage Ⅳb rectal cancer. Laparoscopic abdominoperineal resection with standard lymph node dissection was performed. There have been a few reports on laparoscopic colorectal resection for patients with left-sided inferior vena cava. We report a case of laparoscopic abdominoperineal resection for a patient with left-sided inferior vena cava.A 60s man was diagnosed with rectal cancer and underwent low anterior resection of the rectum. The pathological diagnosis was mucinous adenocarcinoma, pT3(SS), pN0, pM0, pStage Ⅱ. Two years after the primary surgery, contrast-enhanced CT showed local recurrence on the oral side of the anastomosis. As the tumor had invaded the left seminal vesicle and coccygeus muscle, neoadjuvant chemoradiotherapy(NACRT)(S-1 80mg/m / 2 plus 45 Gy/25 Fr)was performed. After NACRT, abdominoperineal resection, including the left seminal vesicle, coccygeus muscle, and coccygeal bone, was performed. Pathological examination showed a histological response of Grade 2 and that R0 resection was achieved. Although the only radical treatment of locally recurrent rectal cancer is R0 resection, we performed R0 resection with Grade 2 histological response to NACRT.With the advancement ofchemotherapy against colorectal cancer, clinical complete responses(cCR)are more frequently observed. We report a case oflocally advanced rectal cancer with maintained long-term cCR after chemotherapy alone. Detailed examinations ofa man in his 60s revealed that he had poorly controlled diabetes mellitus, with elevated serum CEA and CA19-9 levels. Colonoscopy revealed rectal cancer(Rba). Besides the prostate invasion observed in the CT scan, intestinal obstruction was caused by a tumor that required surgical removal. However, the tumor was unresectable due to prostate and pelvic wall metastases; therefore, only sigmoid colostomy was performed. After 6 courses of mFOLFOX6, the tumor shrunk, and prostate invasion reduced as confirmed by the CT scan. Chemotherapy was switched to sLV/5FU2 due to the occurrence of peripheral neuropathy. No tumor was found after 20 courses of treatment, and cCR was achieved after 58 courses ofcontinuous and consecutive treatment. Throughout the treatment, radical resection was proposed to the patient; however, the surgery was not performed because of his lifestyle, ie, heavy smoking, which resulted in poor blood sugar control.
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