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Biomedical subjects

A Horie

Publications and source records attributed to A Horie.

At least 55 records · Page 3Linked to original sources
PubMed1990

Relation of histopathological features to prognosis of gallbladder cancer.

Sixty-four cases of gallbladder cancer surgically removed were histologically divided into three groups, that is, papillary adenocarcinoma, tubular adenocarcinoma, and undifferentiated carcinoma, and were compared clinicopathologically. The results are as follows. Papillary adenocarcinoma showed little gender preponderance and had a low association with gallstones. Underlying chronic cholecystitis or epithelial metaplasia was infrequent. Most cases were in the early stage, with favorable prognosis. Tubular adenocarcinoma, seen predominantly in females with gallstones, showed a downward invasive growth with unfavorable prognosis. Chronic cholecystitis and epithelial metaplasia were frequent. Undifferentiated carcinomas were common in females with gallstones, and their prognosis was the worst of the three. It was concluded that papillary adenocarcinoma differed from both tubular adenocarcinoma and undifferentiated carcinoma in biological behavior. The former appears to arise mainly from the native gallbladder epithelium, whereas the latter two types frequently arise from metaplastic epithelium.

Adenocarcinoma↗
PubMed1989

[A histopathologic comparative study of European cases of fibrolamellar carcinoma and Japanese cases of sclerosing hepatocellular carcinoma].

Ten fibrolamellar carcinomas (FLCs), 3 FLC-like cancers, and 5 cases of a sclerosing hepatocellular carcinoma (SHCC) were examined clinicopathologically. The FLCs were found in young people in an equal sex ratio and showed no indications of an HBsAg, AFP, or cirrhosis. FLC cancer cell showed a large eosinophilic cytoplasm and prominent nucleoli. SHCCs were found in middle-aged people, male-predominant, and often positive for HBsAg and AFP. Cancer cells of the SHCC type showed less eosinophilic small cytoplasms and inconspicuous nucleoli. Although these two types are fairly distinctive entities, there were a few still unclassified HCCs with fibrous stroma. Further precise criteria would seem to be required for an accurate diagnosis of FLC.

Adolescent↗
PubMed1989

Cytologic, histologic, DNA ploidy and electron microscopic analyses of a case of vulvar Paget's disease.

The cells in a case of multifocal vulvar Paget's disease were studied by cytology, histology, ploidy analysis and electron microscopy. The Paget cells in smears were seen in an isolated or a sheetlike arrangement. The cells had peripherally located nuclei, prominent nucleoli and unevenly distributed melanin granules of various sizes in their cytoplasms. The histologic sections contained multifocal microscopic lesions that were larger than the macroscopic lesion. Paget cells in the histologic sections demonstrated positive cytoplasmic staining with the periodic acid-Schiff, Alcian blue, mucin, glandular cytokeratin, epithelial membrane antigen and carcinoembryonic antigen reactions. The nuclear DNA histogram of the Paget cells in the cytologic smears showed a polyploid pattern, with a sharp peak at 4c; the cells in sheets had a ploidy level between 2c and 4c while a few of the isolated cells had a ploidy level that extended past 8c. Various nuclear DNA patterns were observed in the histologic samples; a recurrent lesion was later found in an area adjacent to the primary lesions that had higher ploidy levels. Ultrastructurally, the Paget cells contained lysosomes and tiny electron-dense secretory granules in their cytoplasms, suggestive of a glandular cell origin. These findings suggest that Paget cells may be derived from the secretory portion of sweat glands.

Cytodiagnosis↗
PubMed1989

Papillary cystic tumor of the pancreas: an immunohistochemical and ultrastructural study of 14 patients.

We report herein the clinicopathological, immunohistochemical and ultrastructural studies on 13 female patients and one male patient with papillary cystic tumors of the pancreas. Their ages ranged from 12 to 60 (mean 25) years. Most patients complained of abdominal mass or abdominal pain. Following complete resection of the tumor, all have remained well for between 3 months and 19 years (maen 5 years). In one patient the tumor was malignant and, 10 years after the initial partial resection, there was a recurrence with involvement of the colon, metastasis to the lymph nodes and venous invasion. Immunohistochemically, most tumor cells were positive for neuron specific enolase, synaptophysin, alpha-1-antitrypsin and vimentin and sometimes for the estrogen receptor related antigen, ER-D5, and the oncogen product of c-Ha-ras, c-Ha-ras P21. Ultrastructurally there were zymogen-like intracytoplasmic granules, intercellular junctions and intercellular spaces. These results support the hypothesis that the tumor originates from undifferentiated cells capable of differentiation toward acinar, endocrine or ductular cells. Estrogen and the c-Ha-ras oncogene presumably are linked to the development.

Adolescent↗
PubMed1988

Immunohistochemical study of carcinoembryonic antigen (CEA) in lung carcinoma by five monoclonal antibodies.

The expression of carcinoembryonic antigen (CEA) and related antigens in 40 formalin-fixed paraffin embedded tissues of 4 histological types of lung carcinomas was examined immunohistochemically using five monoclonal antibodies (MoABs) which distinguished different epitopes on CEA, and the correlation with serum-CEA (s-CEA) level and tissue-CEA (t-CEA) was also investigated. Four MoABs detecting different peptide epitopes of CEA and another MoAB recognizing the carbohydrate part of CEA were used. Although each MoAB showed different frequencies of immunohistochemical expression according to the histological types, a similar tendency was generally suggested in four MoABs that recognized peptide epitopes of CEA except for one MoAB that recognized a carbohydrate epitopes of CEA. There was no difference among the five MoABs in regard to the staining localization exhibited by MoABs, but there was a difference among the four histological types. Elevation of s-CEA did not always occur in patients with lung cancers showing positive reaction to t-CEA, especially in adenocarcinoma and squamous cell carcinoma, but all patients with lung cancers showing intense positive reaction to t-CEA showed high degrees of elevation of s-CEA.

Adenocarcinoma↗
PubMed1988

Histologic types of lung cancers among male Japanese copper smelter workers.

This study was done to investigate which histologic type of lung cancer is prevalent among male Japanese copper smelter workers. A panel of eight pathologists was asked to diagnose uniformly prepared materials for 19 occupational series, 87 nonoccupational bronchogenic carcinomas, and 14 benign lesions. The consensus diagnosis was used as reference. The reference diagnoses and the originals without materials employed for verification were designated as finals. Squamous cell carcinoma was the most frequent cell type in the occupational group, which comprised 21 (75.0%) of 28 histologically proven cases. There were three (10.7%) small cell carcinomas, one (3.6%) large cell carcinoma, and three (10.7%) adenocarcinomas. The proportion of Kreyberg group I in the occupational cases was significantly larger than that of lung cancers in the population-based cancer registries in Japan. These findings are compatible with Kreyberg's hypothesis. Above all, squamous and small cell carcinomas were prominent and appeared to be environmentally related bronchogenic carcinomas.

Adenocarcinoma↗
PubMed1988

Lung burden of green nickel oxide aerosol and histopathological findings in rats after continuous inhalation.

There are few inhalation studies of nickel carcinogenesis. In this study, Wistar male rats were exposed to green nickel oxide (NiO(G)) aerosols (mass median aerodynamic diameter, 0.6 microns) for 7 h/d, 5 d/wk for up to 12 mo. The average exposure concentration was controlled at 0.3 and 1.2 mg/m3 during the exposure. For histopathological examination and measurement of the nickel concentration in rat organs, the rats were sacrificed at 3, 6, and 12 mo of exposure and 8 mo clearance period following 12 mo of exposure. The nickel content in rat lungs that was observed up to 2.6 mg after 12 mo exposure, was proportional to the exposure concentration during the exposure. The clearance of the nickel from the lungs was very slow and the biological half time was determined 7.7 mo. Although the rats were exposed continuously to NiO(G) for 12 mo and kept for 8 mo clearance period, there were no malignant tumors in any of the exposed animals.

Aerosols↗
PubMed1988

Bilateral renal dysplasia, pancreatic fibrosis, intrahepatic biliary dysgenesis, and situs inversus totalis in a boy.

This is a case report of a Japanese newborn infant showing bilateral renal dysplasia, severe pancreatic fibrosis simulating cystic fibrosis, intrahepatic biliary dysgenesis, and situs inversus totalis. The chromosomal analysis was normal. A review of the literature showed that there was another case exactly the same. These two rare cases had no difinite evidence of blood relationship, but occurred in the same town in a remote area.

Bile Ducts, Intrahepatic↗
PubMed1988

Unusual clear regenerative nodules of the liver with accumulation of orcein and victoria blue-positive granules.

An unusual nodular transformation of the liver was found in a 53-year-old man with meningoencephalitis who died of brain stem herniation. Postmortem examination revealed marked neuronal ischemic changes and bronchopneumonia as well as meningoencephalitis. The liver showed no significant lesions macroscopically. Histologically, there were many small nodules, less than 1 mm in diameter and composed of clear hepatocytes, throughout the liver. The liver cells in these nodules showed mild hyperplastic changes. Many fine granules, stained by orcein and Victoria blue, were found exclusively in the hepatocytes of these nodules. We describe the peculiar histopathology of this case with reference to some related lesions.

Carrier Proteins↗
PubMed1988

Massive hepatic infarction associated with polyarteritis nodosa.

A massive hepatic infarction was found in a 44-year-old man who had suffered from polyarteritis nodosa for two years. The polyarteritis had been well controlled by administration of corticosteroids, but he died due to an opportunistic fungal infection. At autopsy, a massive hepatic infarct and a fresh thrombus occluding the right portal vein trunk were found. In addition, occlusion of the heptic arterial branch with fibrosis and dissociation of elastic fibers due to polyarteritis was noted. Massive hepatic infarction is uncommon. The clinicopathologic features of this case are described, and the pathogenesis of hepatic infarcts is discussed.

Adult↗
PubMed1988

[A clinico-pathological study involving a consecutive series of 75 primary liver carcinomas with resection].

Seventy-five consecutive primary liver cancers that had a hepatic resection have been examined clinicopathologically. Eighteen were HBsAg+ cases (mean age: 50.9 yr) and 57 were HBsAg- cases (mean age 60.1 yr). HBsAg was not detected in the livers of the 57 HBsAg- cases, though it was found in the noncancerous parts of 16 of these cases and in the cancerous parts of 3 of the 18 HBsAg+ cases. A histologic, comparative study between the HBsAg+ and HBsAg+ cases showed no significant morphologic differences, except for somewhat frequent portal invasions in the former. From the viewpoint of prognosis, the ominous signs seem to be a positivity of serum HBsAg, large tumors, the presence of a portal and/or hepatic venous invasion, the presence of intra-and/or extrahepatic implants, and a high Edmondson's grade.

Carcinoma, Hepatocellular↗
PubMed1987

Histochemical and ultrastructural study of copper-binding protein in hepatocellular carcinoma.

Orcein-positive hepatocellular material (OPHM), found in 18 of 44 hepatocellular carcinomas (HCC), was compared histochemically and ultrastructurally with similar granular materials in other liver diseases. OPHM was not found in 15 control livers, 45 metastatic liver cancers or ten cholangiocellular carcinomas. OPHM in HCC was stained with orcein when the tissue sections were preoxidized. In addition, it was positively stained with rhodanine and rubeanic acid for copper. These findings were identical to the OPHM in Wilson's disease, in primary biliary cirrhosis and in neonatal livers. Seven of 12 resected HCC revealed cytoplasmic dense bodies ultrastructurally in which an x-ray microanalyzer demonstrated copper. OPHM in HCC, a granular accumulation, was concluded to be rich in copper-protein complex, and might correspond to dense bodies derived from lysosome ultrastructurally. The pathogenesis and biologic significance of this copper overload in a number of HCC are also discussed.

Carcinoma, Hepatocellular↗
PubMed1987

Immunocytochemical markers of uncommon pancreatic tumors. Acinar cell carcinoma, pancreatoblastoma, and solid cystic (papillary-cystic) tumor.

Nine acinar cell carcinomas of the pancreas, 2 pancreatoblastomas, 16 solid-cystic (papillary-cystic) tumors, and 20 ductal adenocarcinomas were immunocytochemically investigated using antisera against four pancreatic enzymes (alpha-amylase, lipase, trypsinogen, chymotrypsinogen), four pancreatic hormones, neuron specific enolase (NSE), alpha-1-antitrypsin (AAT), carcinoembryonic antigen (CEA), and CA 19-9. Lipase, trypsinogen, and chymotrypsinogen, but no alpha-amylase were detected in all acinar cell carcinomas and pancreatoblastomas. In contrast, solid-cystic tumors (SCT) were negative for pancreatic enzymes but 2 of 16 stained with NSE. No neuroendocrine granules or pancreatic hormones could be demonstrated. AAT was found in all tumors except ductal adenocarcinomas, which stained with CEA and CA 19-9. The study established pancreatic enzymes (except alpha-amylase) as immunocytochemical markers for acinar cell carcinomas and pancreatoblastomas. There is as yet no marker specific for SCT, which would elucidate the obscure histogenetic origin and phenotypic differentiation of these tumors.

Adolescent↗
PubMed1987

Cumulative toxicity potential of methomyl aerosol by repeated inhalation.

There are few investigations concerning the cumulative toxicity of agricultural chemicals by repeated inhalation. In this study, Wistar male rats were exposed to methomyl powder (mass median aerodynamic diameter, 4.4 microns) for a single 4-hr exposure, or for 4 hr/day, 5 days/week for 3 months. The average exposure concentrations were controlled at 9.9 mg/m3 for the single exposure and at 14.8 mg/m3 for repeated exposures by a dust generator consisting of a continuous fluidized bed with an overflow pipe and a screw feeder. After the repeated exposures, plasma and red cell cholinesterase activities, and lipid concentrations of the rat lungs were measured and histopathological examinations were performed. There was no evidence of cumulative effects on the red cell cholinesterase activity, histopathological changes and lipid concentration in 3-month repeated inhalation.

Aerosols↗
PubMed1987

Argyrophilic adenocarcinoma of the prostate with Paneth cell-like granules.

A prostatic adenocarcinoma with argyrophilia and many Paneth cell-like granules in a 91-year-old man is reported. The initial symptom was pollakisuria, and the laboratory data showed no significant abnormality except for moderate anemia. Through radiologic examinations a right hydronephrosis and metastatic cancer of the lumbar vertebra were suspected. Because prostatic cancer was suspected, a needle biopsy of the prostate was performed. Routine histologic examinations revealed a moderately differentiated adenocarcinoma of the prostate. By hematoxylin and eosin stain, eosinophilic large granules like those of Paneth cells were found in many cancer cells. In addition, argyrophilic cancer cells were seen by Grimelius' stain. Immunoperoxidase staining elucidated a definite reactivity for lysozyme in the granules like Paneth cells. Ultrastructurally, the granules of Paneth cell-like cancer cells were electron-dense spherical bodies with a medium diameter of 540 nm. Prostatic adenocarcinoma with argyrophilia is rare, and the argyrophilic adenocarcinoma with Paneth cell-like granules is very rare in the prostate.

Adenocarcinoma↗
PubMed1987

Inter- and intra-pathologist variability in histologic diagnoses of lung cancer.

To estimate variability and reliability in histologic diagnosis (Dx) of lung cancers, lung cancer preparations were divided into eight equal sets and diagnosed independently by an eight-man pathology panel. Majority Dx (Dx affirmed by more than 4 panelists) was regarded as the consensus Dx of each cancer. The consensus rate of each panelist ranged from 78.8% to 96.1% with an average of 89.4%. The consensus rates were not significantly different among the panelists. Relatively high inter-pathologist agreement was observed in squamous cell carcinoma, adenocarcinoma, and small cell carcinoma. However, regarding large cell carcinoma, there was occasional disagreement among the panelists. Forty-seven cancers were reexamined by the same panelists, with no preliminary announcement, 7 months after the first examination to study the intra-pathologist agreement. The rate of the intra-pathologist agreement ranged from 76.6% to 93.3%. Dx of large cell carcinoma was the most intra-changeable. It was concluded that the histologic Dx of large cell carcinoma was the most inter- and intra-changeable, and the most frequent dissenting Dx from it was poorly differentiated squamous cell carcinoma.

Adenocarcinoma↗