Publications by authors named "Kimiyoshi Yokoi"

Article Synopsis
  • Mucoceles of the appendix are mucus-filled lesions that lead to swelling of the ileocecal appendix, often resembling tumors.
  • A 48-year-old woman with no symptoms was hospitalized after a mass was found in her lower right abdomen.
  • She had surgery for a suspected appendiceal tumor, but the final diagnosis revealed it to be a giant appendiceal mucocele.
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We treated a patient who had gastrointestinal perforation during chemotherapy with docetaxel and S-1 which was successfully treated with percutaneous drainage. A 66-year-old man was admitted to our hospital with complaints of abdominal pain. Gastric cancer (T3N1M0) had been diagnosed 3 years earlier, and distal gastrectomy had been performed.

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Background: Hepatic pedicle clamping (HPC) has been demonstrated to be effective for short-term outcomes during hepatic resection. However, HPC-induced hepatic ischemia/reperfusion injury can accelerate the outgrowth of hepatic micrometastases in experimental studies. The conclusive evidence regarding effects of HPC on long-term patient outcomes after hepatic resection for colorectal liver metastasis (CRLM) has not been determined.

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Background: The negative impact of postoperative complications (POCs) on long-term outcomes is well documented for several cancer surgeries, but conclusive evidence has yet to be provided on the influence of POCs on long-term oncological outcomes after hepatic resection for colorectal liver metastasis (CRLM).

Methods: Studies published through February 2012 evaluating the oncological impact of POCs after hepatectomy for CRLM were identified by an electronic literature search. Finally, 4 studies were identified and included in the meta-analysis.

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Oxaliplatin (L-OHP)is an important chemotherapeutic drug for the treatment of colorectal cancer. Peripheral neuropathy was observed in 90% of patients who received L-OHP.Neuropathy often results in the discontinuation of treatment or a decrease the quality of life(QOL).

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Nausea and vomiting are common side effects due to opioid therapy, and may greatly impede the quality of life of cancer patients. A preventive method for nausea and vomiting has not yet been established. We developed a clinical pathway(CP) for cancer pain management in which prochlorperazine is used for the prevention of nausea and vomiting caused by opioids.

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Background: Implantation of exfoliated cancer cells has been suggested as a possible mechanism of local recurrence at the site of colorectal anastomosis. Intraoperative rectal washout has been suggested to eliminate free cancer cells; however, there is no conclusive evidence of a beneficial effect of intraoperative rectal washout on local recurrence after anterior resection of rectal cancer.

Methods: Studies published through February 2012 evaluating the impact of intraoperative rectal washout for local recurrence or positive cytology from donuts wash were identified by an electronic literature search.

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The collagen gel droplet-embedded culture drug sensitivity test (CD-DST) is one of the best chemosensitivity tests owing to its high success rate. However, CD-DST is often a culture method, and contamination is a serious problem, especially in the case of colorectal cancer, which is contaminated by enteric bacteria. It has been reported that the success rate of CD-DST is 64.

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To evaluate the efficacy of S-1 for Stage IV gastric cancer, we retrospectively examined 124 patients with Stage IV gastric cancer. We classified patients into two groups based on the presence or absence of S-1 administration: the S-1 therapy group (n= 56) and the non-S-1 therapy group (n=68). Basically, patients received S-1 orally at 40 mg per square meter of body surface area twice daily for 4 weeks, followed by 2 weeks without chemotherapy.

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We report a case of esophageal squamous cell carcinoma (ESCC) directly invading the liver and causing a pyogenic liver abscess. The patient was a 66-year-old man who presented with dysphagia. Esophagography, endoscopic study, and computed tomography (CT) showed a mass lesion in the lower third of the esophagus.

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Unlabelled: The response rate of Irinotecan for gastric cancer is reported to be 18. 4%. The rate is improved by combination with 5-FU.

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We report on a patient with obstructive jaundice caused by recurrence of gastric carcinoma in the wall of an extrahepatic bile duct more than 5 years after gastrectomy who was treated with pancreaticoduodenectomy. Histopathologic examination of the surgically resected specimen revealed a poorly differentiated adenocarcinoma with focal signet ring cells in the wall of the common bile duct which was histologically similar to the primary gastric carcinoma. To confirm the diagnosis, immunohistochemical staining was performed with antibodies against cytokeratins (CK7, CK20) and mucin peptide core antigens (MUC5AC, MUC6, MUC2).

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We report the case of a patient with paraduodenal hernia diagnosed incidentally during an operation for transverse colon cancer. The patient was a 77-year-old woman who complained of dizziness. Laboratory data revealed no abnormal findings except slight anemia.

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A 56-year-old woman visited our hospital because of high fever and right hypochondralgia. Abdominal computed tomography showed a liver cyst 10 cm in diameter and dilatation of the intrahepatic bile duct. Percutaneous transhepatic drainage of the cyst guided by ultrasonography disclosed that the cyst contained a brown milky fluid, and cystography showed biliary communication.

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Here, we report on two patients with hemorrhagic shock due to hematemesis from a gastrointestinal stromal tumor (GIST) of the stomach. Patient 1 was a 64-year-old woman who was admitted to our hospital because of syncope due to hemorrhagic shock resulting from massive hematemesis. Emergent upper gastrointestinal (GI) endoscopy revealed a 5-cm-diameter submucosal tumor on the lesser curvature of the lower gastric body.

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Adenocarcinoma accounts for most of the malignant tumors originating from the colon, whereas adenosquamous carcinoma is rare, accounting for about 0.1% of all colon cancers. We present herein a case of adenosquamous carcinoma of the ascending colon.

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A 53-year-old male presenting with anorexia, intermittent diplopia, general fatigue, headache and vertigo was admitted to our hospital. He was diagnosed as having gastric cancer by endoscopy of his upper gastrointestinal tract. Brain computed tomography (CT) showed no abnormalities, but magnetic resonance imaging (MRI) showed slight enhancement in the cerebellar sulcus.

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We report on a patient with male choriocarcinoma. The patient was a 31-year-old male patient with jejunal choriocarcinoma that metastasized from the mediastinum. He was admitted complaining of melena and severe anemia.

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Introduction: Orotate phosphoribosyl transferase (OPRT), dihydropyrimidine dehydrogenase (DPD), and thymidylate synthase (TS) are initial key enzymes in the 5-fluorouracil (5-FU) metabolic pathway. The expression levels and activities of these three enzymes play important roles in the response of cancer patients to 5-FU-based chemotherapy.

Purpose: The purpose of this study was to investigate the relationship between the activities of 5-FU metabolic enzymes and clinicopathologic factors in colorectal cancer.

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Paclitaxel (PTX), which is used for ovarian cancer, lung cancer, breast cancer and gastric cancer, is administered at a dose of 210 mg/m(2) once every three weeks. However, WHO grade 3-4 hematological and non-hematological toxicity occurred frequently in this manner. In recent studies about ovarian cancer and lung cancer, a schedule in which PTX was given weekly could have the same or better efficacy, with fewer side effects.

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Here, we report the case of patient with multiple gastric carcinoids showing histopathological behavior similar to that of type I carcinoid tumors of the stomach. The patient was a 61-year-old man diagnosed as having a gastric tumor, which was revealed by follow-up computed tomography. Upper gastrointestinal endoscopy revealed a protruded tumor in the greater curvature and a small polyp in the anterior wall of the upper stomach.

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Here we report the case of a patient with advanced gastric cancer with esophageal invasion who was treated with chemotherapy using S-1 and cisplatin (CDDP) preoperatively. The patient was a 72-year-old woman who was diagnosed with advanced gastric cancer (T3N2M0) with esophageal invasion. S-1 was orally administered at 80 mg/day (60 mg/m(2) per day) on days 1-14 and CDDP was infused at 80 mg/day (60 mg/m(2) per day) on day 8, followed by a 1-week rest.

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We report on a patient with rectal malignant melanoma. The patient was a 40-year-old man who complained of anal bleeding. His grandmother had died of pancreatic cancer and his mother had been operated for rectal cancer.

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Hemophilia A is a sex-linked hereditary disease, and the total number of patients with this condition is small. It is quite rare for general surgeons to encounter a patient with hemophilia A. Moreover, it is extremely rare for surgeons to encounter adult patients with undiagnosed hemophilia.

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Here, we report on a patient with squamous cell carcinoma (SCC) arising from recurrent anal fistula. The patient was a 57-year-old woman who had 32-year history of having a recurrent perianal abscesses that ruptured spontaneously. Six months before her admission to our hospital, anal pain developed.

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