Publications by authors named "Isao Arai"

A 73-year-old man underwent distal gastrectomy, D2 lymphadenectomy, and Billroth Ⅰ reconstruction for Type 3 advanced cancer in the lower corpus lesser curvature in 20XX. After postoperative adjuvant chemotherapy, he self-detected a mass in the left breast. It was diagnosed as breast cancer.

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We present an interesting case in which a patient diagnosed with primary peritoneal cancer after the resection of a greater omentum mass achieved recurrence-free survival without postoperative systemic chemotherapy. The patient was a 78-yearold woman with no history ofmalignant disease. She underwent abdominal ultrasound at a local clinic, which revealed a mass shadow near the descending colon.

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We herein report a patient with postoperative late recurrence ofbreast cancer that was resistant to systemic therapy who achieved long-term survival after aggressive surgical treatment. A 53-year-old woman underwent modified muscle-preserving radical mastectomy for right breast cancer in May 1999. Adjuvant therapy with oral anticancer agents and an antiestrogen were initiated.

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We herein report an interesting case in which a complete response was achieved with oral anticancer monotherapy for unresectable lymph node metastasis after surgery for cecal cancer. A 78-year-old woman was referred to our hospital to undergo a detailed examination for anemia. The examination led to a diagnosis of cecal cancer.

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We report here a rare case of gastric metastasis after resection ofa transverse colon cancer in which eating ability was restored following mFOLFOX6 (folinic acid plus fluorouracil plus oxaliplatin) plus cetuximab (Cet) chemotherapy. A 56-year-old man with chief complaints of constipation and abdominal fullness was referred to our hospital. In February 2013, he was diagnosed with transverse colon cancer via enema and colonoscopy.

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We report a rare case of long -term survival after laparoscopic resection of sigmoid colon cancer with multiple liver metastases, followed by 5-fluorouracil Leucovorin irinotecan with bevacizumab (FOLFIRI+Bev) chemotherapy. A 61-year-old woman was referred to our hospital with a principal complaint of bloody stools. She was diagnosed with sigmoid colon cancer by colonoscopy and multiple liver metastases by ultrasonography.

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We report a rare case of a patient with multiple liver metastases of gastric and rectal cancers after laparoscopic sigmoidectomy, who responded completely to S-1 therapy followed by open gastrectomy. A 72-year-old man with a chief complaint of occult blood in the feces was referred to our hospital and was diagnosed with rectal cancer by colonoscopy. In addition, we found concomitant gastric cancer by gastrointestinal fiberscopy.

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It has been thought that phosphorus in biominerals made of amorphous calcium carbonate (ACC) might be related to ACC formation, but no such phosphorus-containing compounds have ever been identified. Crustaceans use ACC biominerals in exoskeleton and gastroliths so that they will have easy access to calcium carbonate inside the body before and after molting. We have identified phosphoenolpyruvate and 3-phosphoglycerate, intermediates of the glycolytic pathway, in exoskeleton and gastroliths and found them important for stabilizing ACC.

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Introduction: Small bowel adenocarcinoma is a rare malignancy associated with a poor prognosis and there is little evidence of effective treatment. Recurrent small bowel adenocarcinoma is an intractable disease for which there is little information available regarding its treatment by palliative therapy. We present a case of recurrent small bowel adenocarcinoma successfully treated by cytoreductive surgery and palliative chemotherapy.

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Distinguishing primary ovarian cancer from metastatic colorectal cancer is often difficult by a conventional pathological examination alone. We assessed the usefulness of p53 gene mutation analysis for the differential diagnosis of ovarian adenocarcinoma. A 66-year-old woman suffered multiple organ metastases, including the liver, para-aortic lymph node, and right ovary, following an operation for advanced sigmoid colon cancer.

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We recently reported that interferon-alpha (IFN-alpha) and 5-fluorouracil (5-FU) combination therapy in advanced hepatocellular carcinoma (HCC) achieved excellent clinical results. However, the mechanism underlying this combination therapy remains to be elucidated. In this study, we examined the anti-tumor effects of IFN-alpha and 5-FU combination therapy in vivo and aimed to reveal its anti-angiogenic effects by investigating the expression of vascular endothelial growth factor (VEGF) and angiopoietins (Ang-1 and Ang-2).

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Background/aims: Extracellular matrix-degrading matrix metalloproteinases (MMPs) are invariably up-regulated in epithelial cancers and are key agonists of angiogenesis, invasion and metastasis. Recent studies have shown high levels of various MMPs, including MT1-MMP, MMP-1, MMP-2 and MMP-9, and their involvement in tumor progression in human hepatocellular carcinoma (HCC). However, the expression and role of MT3-MMP in HCC remains unclear.

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To investigate the effect of biochemical modulation on antitumor activity shown by the combination of 5-Fluorouracil (5-FU) and interferon-alpha (IFN-alpha), experimental therapy was performed on human hepatocellular carcinoma cell (HuH7, PLC/PLF/5) xenografts inoculated into nude mice, using 5-FU and IFN-alpha, either alone or in combination. These agents showed antitumor activity in different degrees. Although IFN-alpha, given as 100,000 units/mouse/3 times/week subcutaneously x 6, and 5-FU, given as 0.

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Background/aims: The prognosis of hepatocellular carcinoma (HCC) is poor because of frequent intrahepatic metastasis (IM) or multicentric carcinogenesis (MC). We compared the effectiveness of loss of heterozygosity (LOH) analysis in the diagnosis of these two forms with that of histopathological diagnosis.

Methods: Using LOH analysis of 15 specific DNA microsatellite loci, tumor clonality was assessed in 37 cases.

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The patient was 63-year-old male. Abdominal CT revealed a tumor at S2/S3, which led to a diagnosis of hepatocellular carcinoma, in April 1998. On April 15, 1998 transcathetereal arterial embolization was performed and on May 11, 1998 percutaneous ethanol injection therapy was given, but a viable lesion remained.

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Because of the low incidence rate of combined hepatocellular-cholangiocarcinoma (combined HCC-CC), the clinicopathological features of a recurrent tumor of this disease remain to be elucidated. We describe a 47-year-old Japanese woman with a 5-cm diameter mass lesion in the liver. A hepatectomy and dissection of the local lymph nodes were performed and a histological examination of the resected specimen showed combined HCC-CC.

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We report the case of a liver abscess associated with microwave coagulation therapy (MCT). A 67-year-old man underwent a pylorus-preserving pancreatoduodenectomy for bile duct cancer in August 1998. In June 1999, abdominal computed tomography (CT) showed three low-density areas in his liver.

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