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Akihiro Hemmi

Publications and source records attributed to Akihiro Hemmi.

11 recordsLinked to original sources
PubMed2006

Application of a quick-freezing and deep-etching method to pathological diagnosis: a case of elastofibroma.

A case of elastofibroma in a middle-aged Japanese woman was examined by the quick-freezing and deep-etching (QF-DE) method, as well as by immunohistochemistry and conventional electron microscopy. The slowly growing tumor developed at the right scapular region and was composed of fibrous connective tissue with unique elastic materials called elastofibroma fibers. A normal elastic fiber consists of a central core and peripheral zone, in which the latter has small aggregates of 10 nm microfibrils. By the QF-DE method, globular structures consisting of numerous fibrils (5-20 nm in width) were observed between the collagen bundles. We could confirm that they were microfibril-rich peripheral zones of elastofibroma fibers by comparing the replica membrane and conventional electron microscopy. One of the characteristics of elastofibroma fibers is that they are assumed to contain numerous microfibrils. Immunohistochemically, spindle tumor cells showed positive immunoreaction for vimentin, whereas alpha-smooth muscle actin, desmin, S-100 protein and CD34 showed negative immunoreaction. By conventional electron microscopy, the tumor cell had thin cytoplasmic processes, pinocytotic vesicles and prominent rough endoplasmic reticulum. Abundant intracytoplasmic filaments were observed in some tumor cells. Thick lamina-like structures along with their inner nuclear membrane were often observed in the tumor cell nuclei. The whole image of the tumor cell was considered to be a periosteal-derived cell, which would produce numerous microfibrils in the peripheral zone of elastofibroma fibers. This study indicated that the QF-DE method could be applied to the pathological diagnosis and analysis of pathomechanism, even for surgical specimens obtained from a patient.

Female↗
PubMed2006

[Hepatectomy and perisurgical management for heavy drinker with hepatocellular carcinoma].

Hepatic resection is the first choice of treatment for hepatocellular carcinoma (HCC), and has the best results among the therapeutic options. Preoperative evaluation of liver function in patients and perioperative management for patients, to prevent postoperative complications, are very important. Postoperative pulmonary complications, including pneumonia and atelectasis, were frequently shown in patients who had past history of heavy alcohol-intake. Postoperative pulmonary complications in heavy drinkers were associated with their habit of smoking. Temperance and non-smoking should be required, when hepatectomy will be performed for heavy drinker.

Alcoholism↗
PubMed2006

[Review of relationship between alcohol drinking and esophageal varices].

The adequate treatment for patients with thrombocytopenia, encephalopathy, ascites and esophagogastric varices due to portal hypertension are very important. This review explains the relations between heavy drinkers and symptoms of portal hypertension, especially with regard to the form of esophageal varices. Between heavy drinker and non-heavy drinker, there was no significant differences for form, color and red color sign of varices. In heavy drinker, the ratio of strong red color sign might be higher than non-heavy drinker. Value of portal pressure in heavy drinker might be higher. These results can bring sudden variceal bleeding in heavy drinkers.

Alcohol Drinking↗
PubMed2005

Osteopontin expression in ulcerative colitis is distinctly different from that in Crohn's disease and diverticulitis.

BACKGROUND: The aim of the present work was to assess osteopontin (OPN) expression in the colon tissues of ulcerative colitis (UC), Crohn's disease (CD), and diverticulitis (Div) patients. METHODS: This study included three groups: the UC group, CD group, and Div group. Immunohistochemical staining was performed, using an immunoperoxidase method. RESULTS: Regarding OPN expression in intestinal epithelial cells, no difference was noted among the three groups. However, in the submucosa of the UC group, the ratio of two types of large cells (oval and spindle-shaped) expressing OPN was 61.2 +/- 14.4% (mean +/- SD), which was significantly higher than that in the CD group (14.9 +/- 7.0%; P < 0.05) and that in the Div group (11.2 +/- 6.1%; P < 0.05). In addition, in the UC group, the ratio of these cells in the subserosa (50.1 +/- 15.0%; mean +/- SD) was significantly higher than that in the CD group (16.9 +/- 6.2%; P < 0.05) and that in the Div group (12.6 +/- 5.7%; P < 0.05). In a serial section study, the oval-shaped cells were stained for anti-CD 68, while the spindle-shaped cells were stained for anti-vimentin. CONCLUSIONS: OPN in two types of large colon-infiltrating cells is possibly related to one of the pathogenic factors of UC.

Antibodies, Monoclonal↗
PubMed2004

Squamous cell carcinoma with sarcomatous feature (so-called carcinosarcoma) of stomach probably metastasized from esophageal tumor: a case report with quick-freezing and deep-etching method.

A squamous cell carcinoma (SCC) with sarcomatous features (so-called carcinosarcoma) of stomach is reported in a 72-year-old man. The gastric submucosal tumor (12 x 11 x 6 cm) consisted of carcinoma cells and sarcomatous spindle cells, which were immunohistochemically recognized to contain high molecular weight cytokeratin. These histological and immunohistochemical results indicated that carcinoma cells and spindle tumor cells had cytokeratin similar to that of stratified squamous epithelium. These features were consistent with so-called carcinosarcoma of esophagus. A combined type of tumor consisting of polypoid and shallow ulcerative lesions (5.5 cm in diameter) was demonstrated by the biopsy to have SCC on the polypoid surface area. Therefore, the gastric tumor was thought to have metastasized from the esophageal tumor. The quick-freezing and deep-etching (QF-DE) method demonstrated that many spindle tumor cells in the gastric tumor had abundant intermediate filaments, which were evenly distributed in more peripheral cytoplasm along the cell membrane. This feature was similar to that of the control SCC. Intramembranous protein particles in the cell membrane of the tumor cells were markedly decreased as compared with those of control SCC. These ultrastructures by QF-DE method could be used for the pathological diagnosis of so-called carcinosarcomas of esophagus.

Aged↗
PubMed2004

[A case of long survival with UFT and lentinan treatment in a patient with peritoneal metastasis of gastric carcinoma].

The patient was a 50-year-old female with peritoneal metastasis of Type 4 gastric cancer. She underwent a relative curative resection with total gastrectomy and peritonectomy. Postoperative chemotherapy with 5'-DFUR following 5-FU and CDDP was performed. Thirteen months after surgery, cancer recurrence was suspected due to elevated levels of the serum tumor markers carcinoembryonic antigen (8.9 ng/ml) and alpha fetoprotein (85.8 ng/ml). She was additionally treated with UFT 300 mg/day and Lentinan 2 mg/week. The serum tumor markers decreased gradually returned to normal levels. At 5 years and 8 months after surgery, she is alive without any sign of recurrence.

Antineoplastic Combined Chemotherapy Protocols↗
PubMedDate not supplied

Postoperative complications of hepatectomy for hepatocellular carcinoma in relation to liver fibrosis.

BACKGROUND/AIMS: Hepatectomy for hepatocellular carcinoma remains associated with significant morbidity and mortality, despite improved surgical techniques and perioperative management. The relationship between the extent of liver fibrosis and postoperative complications is controversial. METHODOLOGY: We studied 50 patients in whom hepatectomy for Child-Pugh grade A or B had been indicated. Surgical procedures were determined by the indocyanine green retention rate after 15 minutes (ICGR15). The extent of liver fibrosis was graded according to the Desmet classification. The frequency and grade of severity of postoperative complications were evaluated. RESULTS: Postoperative complications occurred in 24 patients (48%), the frequency being significantly higher among those with liver cirrhosis. However, no significant difference in the incidence of major complications was observed between cirrhotic and non-cirrhotic patients (p=0.311). There was no association between grade of severity of postoperative complications and extent of fibrosis. CONCLUSIONS: When the surgical indication and procedure were selected based on the Child-Pugh classification and ICGR15 value, respectively, the extent of liver fibrosis did not influence the incidence of major postoperative complications. In particular, there was no significant difference in the incidence of life-threatening postoperative complications between cirrhotic and non-cirrhotic patients.

Aged↗
PubMedDate not supplied

Small necrotic liver metastasis with microscopic tumor embolism in hepatic vein: a case report and review of the literature.

Small liver metastasis of rectal carcinoma is mostly solid and rarely accompanied by necrosis. Microscopic invasion of the hepatic vein is rare in colorectal metastasis. A 53-year-old man, 2 years after rectal carcinoma resection, was noted to have a 15-mm liver tumor. On imaging, it was difficult to determine if the mass was hepatic abscess, cyst, solitary necrotic nodule, or liver metastasis. The resected tumor was metastatic liver cancer, the center of which had mostly atheromatous necrosis. Also, a microscopic tumor embolism was detected in the hepatic vein around the tumor. Liver tumors that grow should be suspected of being malignant and be resected.

Adenocarcinoma↗