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Biomedical subjects

M Kojiro

Publications and source records attributed to M Kojiro.

At least 127 records · Page 7Linked to original sources
PubMed1990

[A study of amplifications of myc gene (c-myc and N-myc) in human ovarian cancer].

Amplifications of myc oncogenes (c-myc, N-myc) were studied by Southern blot hybridization methods in ovarian cancers. Fourteen cases were primary ovarian cancers and one case was metastatic ovarian cancer. Primary and metastatic foci of three primary ovarian cancers were compared. A serous adenocarcinoma had a c-myc gene amplification more than 10 fold without N-myc gene amplification. This case also had an amplification in other c-myc probes with upper and down streams of the second exon. The results suggested that this case had c-myc gene expression. One of these cases had 5 fold amplification of the metastatic focus compared with the primary focus. The amplified c-myc gene did not show relations among clinical courses, prognosis and histologies.

Adult↗
PubMed1989

Hepatocellular carcinoma with sarcomatous change: a special reference to the relationship with anticancer therapy.

Among 579 autopsy cases of hepatocellular carcinoma (HCC), 55 cases (9.4%) exhibited a sarcomatous appearance. The incidence of HCC with a sarcomatous appearance has been increasing over the past 17 years. A sarcomatous appearance was found in 20 out of 335 autopsy cases of HCC (5.9%) during the 12 years from 1969 to 1980, and in 35 out of 244 autopsy cases of HCC (14.3%) during the last 6 years, when effective anticancer therapies, such as the one-shot injection of anticancer agents into the hepatic artery (one-shot therapy) and transcatheter arterial embolization (TAE), have become popular. A sarcomatous appearance was found in 20.9% of the cases undergoing anticancer therapy and in 4.2% of the cases not undergoing anticancer therapy. Among the various anticancer therapies, the sarcomatous appearance was most frequent (27.6%) in cases with repeated TAE. Thus, a close relationship between the sarcomatous appearance in HCC and anticancer therapies was suggested. Regarding the development of the sarcomatous appearance, we presume that it may be caused by the phenotypic change of HCC cells caused by anticancer therapy, or that a number of factors, including anticancer therapy, may accelerate the proliferation of the sarcomatous cells existing in the original tumor as one of the histological components. In order to clarify the true nature of sarcomatous lesions in HCC, further histological and biological studies are required.

Carcinoma, Hepatocellular↗
PubMed1989

Hepatocellular carcinoma without cirrhosis in Japanese patients.

Hepatocellular carcinoma is closely associated with cirrhosis, but it also develops, although much less frequently, in a noncirrhotic liver. It is suspected, without supporting evidence, that hepatocellular carcinoma has a different etiology when associated and not associated with chronic liver disease. In this study, 66 noncirrhotic cases found among 618 autopsies for hepatocellular carcinoma (10.7%) were analyzed retrospectively. The noncirrhotic liver was histologically unremarkable in 3 cases and in the histologically evaluable 56 cases it had fibrosis of varying degrees or mild cellular infiltrate, or both, in the portal tract. There was one liver that had portal venous changes compatible with those in idiopathic portal hypertension (Banti's syndrome). In these noncirrhotic livers, the parenchymal cells were generally unremarkable except for liver cell dysplasia that was seen in 26.8%. Serum hepatitis B surface antigen was positive in only 7.4% in contrast to 26.6% in cirrhotic cases. Three histologically unremarkable cases had no clinical or histologic evidence of chronic liver disease; two involved painter-plasterers and one a farmer. The liver weight in these cases ranged from 4400 to 6180 g. In contrast, the average liver weight in cirrhotic cases was 1998 g. Noncirrhotic patients when compared with cirrhotic patients had better liver function tests and much less frequent varices. It was concluded that approximately 11% of hepatocellular carcinoma cases in Japan are noncirrhotic, the majority having some histologic changes in the portal tracts suggestive of past or ongoing chronic liver disease, and that there are rare cases that have no histologic changes in the liver.

Adult↗
PubMed1989

Predominance of squamous cell carcinoma and rarity of adenocarcinoma of maxillary sinus among Japanese.

The reasons for the prevailing predominance of maxillary sinus squamous cell carcinoma and the rarity of maxillary sinus adenocarcinoma among Japanese were investigated in a cooperative study at two institutions. There was little difference in the histological diagnostic criteria. It is hypothesized that the predominance of squamous cell carcinoma and the rarity of adenocarcinoma of the maxillary sinus can be related to the extensive use of softwood in the Japanese furniture industry, to the high prevalence of chronic sinusitis among Japanese in the past or to the popularity of cigarette smoking among Japanese.

Adenocarcinoma↗
PubMed1989

An autopsy case of breast carcinoma with prominent lipid-secretions in the metastatic foci.

A 70-year-old woman was treated with a simple mastectomy followed by a course of 5000 rad to the breast and chemotherapy with 5-fluorouracil for breast cancer. About 15 months later, the patient died of widespread metastases. An autopsy revealed no recurrent cancer in the breast. The metastases were seen in bones (sternum, ribs and spine), pleura, spleen, uterus, ovaries, small intestine, adrenal glands, and lymph nodes (hilar, periaortic and mesenteric). Histologically, the resected tumor was a solid-tubular carcinoma with an infiltrative growth pattern. At autopsy, the tumor cells in the metastatic foci contained an abundance of lipids in the cytoplasm, while the tumor cells in the primary tumor contained small amounts of lipids.

Adenocarcinoma↗
PubMed1989

[Pathomorphologic characteristics of small liver cancer in the early stage and the basic pathologic features of hepatocellular carcinoma].

Thanks to the remarkable advances in diagnostic and therapeutic procedures of hepatocellular carcinoma (HCC), it is not uncommon to encounter small liver cancers of less than one centimeter in diameter. Many such small liver cancers in the early stage consist mostly of highly differentiated HCC, and it is often difficult to diagnose them with conventional pathomorphologic knowledge based on the study of advanced HCC. In the present paper, the pathomorphologic characteristics of small liver cancer in the early stage are described along with the basic pathologic features of HCC.

Carcinoma, Hepatocellular↗
PubMed1989

[Clinicopathological study of malignant ovarian germ cell tumor].

In treating malignant germ cell tumors clinicopathologically at Kurume University Hospital, for 18 years, the total number of patients was 112, including 25 yolk sac tumors (YST), 10 mixed form germ cell tumors (MF), 36 dysgerminomas (DYS), 26 immature teratomas (IT), 2 choriocarcinomas (CHO) and 13 dermoid cysts with malignant transformation (DCMT). The average age of patients in each group was 25.9 years for DCMT patients. When DCMT cases were excluded, ages was closely related to the age of menarche in each patient. The 5 year survival rate for each germ cell malignancy after the first operation was 31.6% for YST cases, 20.0% for MF, 76.7% for DYS, 60.0% for IT and 50.0% for DCMT cases. Despite currently used aggressive kinds of chemotherapy, the clinical stage still had a prognostic significance in all malignant germ cell tumors except dysgerminoma. Since histological maturation of the tumor tissue following treatment courses was observed in YST and IT cases, the possibility of a relationship between prognosis and the histogenetic process was shortly discussed.

Adolescent↗
PubMed1989

Collision of malignant lymphoma and multiple early adenocarcinomas of the stomach.

An unusual case of coexisting malignant lymphoma and adenocarcinoma of the stomach is described. A 61-year-old man with weight loss, malaise, and tarry stool demonstrated diffuse lymphoma, large-cell type, and two early gastric carcinomas. Each of the two early carcinomas collided with malignant lymphoma, respectively. Two histologically different tumors were precisely diagnosed preoperatively in this case. Frequent endoscopy with biopsies from various sites of the lesion is important in achieving a correct diagnosis.

Adenocarcinoma↗
PubMed1988

Pathomorphologic characteristics of 102 cases of thorotrast-related hepatocellular carcinoma, cholangiocarcinoma, and hepatic angiosarcoma.

The pathomorphologic characteristics of 102 autopsy cases of Thorotrast (Th)-related hepatic malignancies were described and compared to the features of non-Th-related cases. Among the 102 Th-related hepatic malignancies, 44 (43.1%) were cholangiocarcinoma (CHC), 39 (38.3%) were angiosarcoma (AGS), 16 (15.7%) were hepatocellular carcinoma (HCC), and 3 (2.9%) were double cancer. In the non-Th-related cases approximately 90% were HCC, and AGS was very rare. Grossly, the majority (91.7%) of Th-related CHC was located in the middle-peripheral portion of the liver. In contrast, 77.8% of the non-Th-related cases were located in the hilar portion. Th-related AGS was classified into four types: diffuse micronodular, multi-nodular, massive, and mixed multi-nodular and massive. Histologically, AGS was characterized by two cell types (spindle-shaped cells and polyhedral cells) and three growth patterns (sinusoidal, cavernous, and solid). In noncancerous areas foci of varying degrees of sinusoidal dilatation with hyperplastic changes of sinusoidal lining cells were observed in all AGS cases and in some of the cases of Th-related CHC and HCC cases. In many (80%) of the non-Th-related HCC, mixed macronodular and micronodular cirrhosis was associated. By contrast, in Th-related HCC cases cirrhosis was superimposed on varying degrees of hepatic fibrosis related to Th deposition in only four cases (21.1%). Taken together, these findings suggest that Th influences are more carcinogenic to epithelial cells of the bile duct and sinusoidal lining cells than hepatocytes.

Adenoma, Bile Duct↗
PubMed1988

Cornelia de Lange syndrome associated with Wilms' tumour and infantile haemangioendothelioma of the liver: report of two autopsy cases.

Two cases of Cornelia de Lange syndrome associated with infantile haemangioendothelioma of the liver and Wilms' tumour are reported. The patients showed the characteristic facies of the Cornelia de Lange syndrome, with synophrys, long curly eyelashes and small upturned nose, and physical features, including generalized hirsutism, monodactyly, syndactyly and clinodactyly. Post-mortem examination revealed annular pancreas, patency of the foramen ovale, duodenal atresia and evidence of cytomegalic infection. The cases are reported to document a possible association between malformations and neoplasms in this syndrome.

De Lange Syndrome↗
PubMed1988

Establishment and characterization of a new human renal cell carcinoma cell line (KRC/Y).

A new renal cell carcinoma (RCC) cell line (KRC/Y) has been established from a surgical specimen of a 41-yr-old Japanese female patient with RCC composed of both clear cells and granular cells. This cell line has been maintained for more than 15 mo. through 45 passages with a stable growth. KRC/Y cells have clear or eosinophilic polygonal cytoplasm and round to oval nuclei with one or two nucleoli, and proliferate in a pavementlike cell arrangement with a lack of contact inhibition. By electron microscopy, these cells contain abundant fat droplets and glycogen granules or well-developed organelles or both, which were also observed in the original tumor. The doubling time of these cells at the 15th passage was 73 h. The chromosome number was from 37 to 45 with a hypodiploid modal number of 42. Tumorigenicity was identified by tumor formation after subcutaneous injections of KRC/Y cells in nude mice, which showed close resemblance to the original tumor by light and electron microscope observations.

Adult↗
PubMed1988

Heterotransplantation of an alpha-fetoprotein-producing human gallbladder carcinoma into nude mice.

An alpha-fetoprotein (AFP)-producing human gallbladder carcinoma showing direct invasion into the liver was transplanted into BALB/c-nu/nu nude mice. Although patient serum levels of AFP and carcinoembryonic antigen (CEA) were within normal limits, they were elevated to 1,040 ng/ml and 22.1 ng/ml, respectively, after cholecystectomy. Prominent liver metastasis was demonstrated by diagnostic imaging techniques shortly after the operation. Pathologically, the resected tumor consisted of papillotubular adenocarcinoma and the part which had invaded the liver showed a solid growth pattern with no papillo-tubular structure. The transplanted tumor showed both papillo-tubular and solid growth patterns, in which positive reactions for AFP, CEA, ferritin (FER), carbohydrate antigen 19-9 (CA 19-9), albumin (ALB) and fibrinogen (FIB) were confirmed by the avidin-biotin-peroxidase complex method. Serum levels of AFP, CEA, CA 19-9, beta 2-microglobulin (BMG) and FER were elevated in the nude mice bearing tumor transplants. Twenty-five percent of the serum AFP from nude mice with tumor transplants bound with concanavalin A (Con A), suggesting that the tumor was of gastrointestinal rather than hepatic origin.

Adenocarcinoma↗
PubMed1988

A new human pleomorphic hepatocellular carcinoma cell line, KYN-2.

A new human hepatocellular carcinoma (HCC) cell line, KYN-2, has been established from a surgical specimen obtained from a 52-year-old Japanese male HCC patient. The originally resected HCC was classified as pleomorphic HCC corresponding to Edmondson-Steiner's grade III with a thick trabecular to solid arrangement. The cell line has been maintained for 17 months through 35 passages. Morphologically, the KYN-2 cells have retained the characteristics of the original HCC, being pleomorphic and composed of various types such as cells with relatively small, polygonal, eosinophilic cytoplasm and oval-shaped nuclei with a marked tendency to pile up, flat cells with abundant clear cytoplasm and oval-shaped nuclei, and many multinucleated giant cells, proliferating in a pavement-like cell arrangement. Some junctional complexes and a number of microvilli are evident between the cells by electron microscopy. Functionally, these cells were found to secrete albumin, alpha 1-acid glycoprotein, alpha 1-antitrypsin, ceruloplasmin, transferrin, complement C, fibrinogen, fibronectin, prothrombin, retinol-binding protein (serum type), alpha-fetoprotein (AFP), carcinoembryonic antigen (CEA), ferritin and beta 2-microglobulin in chemically defined medium (CDM). The secretion of AFP and CEA is apparently dependent upon culture medium and passage. The doubling time of cells growing in serum-containing medium at the 14th passage was 84 h, and those of cells in serum-containing medium, HB101 (serum-free medium) and CDM at late passage were 28, 68, and 42 h, respectively. Chromosome analysis revealed that the chromosome number ranged from 56 to 69 without a mode, and the presence of marker chromosomes. HB virus DNA sequence was not detected by hybridization analysis. The tumorigenicity of KYN-2 cells was identified by development of tumors in nude mice after subcutaneous injection of the cells; the tumors showed an appearance basically similar to that of the original HCC. Thus, these findings suggest that the KYN-2 cell line is available as a new human HCC cell line and should be useful for various studies on HCC.

Animals↗
PubMed1987

Hepatocellular carcinoma with sarcomatous change. Clinicopathologic and immunohistochemical studies of 14 autopsy cases.

Among 355 autopsy cases of hepatocellular carcinoma (HCC), 14 cases exhibited sarcomatous appearance (incidence, 3.9%). A clinicopathologic study was performed in these 14 cases, and the immunohistochemical localization of keratin (KRT), vimentin (VMT), albumin (ALB), fibrinogen (FBG) and alpha-fetoprotein (AFP) was also examined using the avidin-biotin complex method. Clinically, the HCCs with sarcomatous appearance were characterized by negative or low serum AFP levels and high incidence of extrahepatic metastasis. Grossly they were of infiltrative, mixed expansive and infiltrative, and pedunculated types. Histologically, the tumor consisted mainly of spindle-shaped cells and partly of multinucleated cells, and showed a sinusoidal growth pattern at the tumor-nontumor boundary. Immunohistochemically, tumor cells in the regions showing sarcomatous appearance were frequently found to be positive to KRT and VMT, whereas the percentage of positivity to ALB, FBG, and AFP were not significantly different from those in ordinary HCC. These results strongly suggest that the lesion showing sarcomatous appearance represents the sarcomatous change of HCC rather than being regarded as the complication of HCC and sarcoma.

Adult↗
PubMed1987

Relationship of histologic grade of hepatocellular carcinoma (HCC) to tumor size, and demonstration of tumor cells of multiple different grades in single small HCC.

The histologic features of 65 surgically resected cases of hepatocellular carcinoma (HCC) were studied, and the cellular differentiation was graded from I to IV according to Edmondson-Steiner's classification. HCC cells of 2 or more grades were seen in 31 (47.7%) of the 65 cases. There was no significant difference in the proportion of HCC composed of tumor cells of more than one histologic grade between HCCs with association with liver cirrhosis and without cirrhosis. Among these 31 cases, extremely well-differentiated HCC, corresponding to Edmondson-Steiner's grade I carcinoma, was found in 9 of 11 tumors smaller than 3 cm in diameter, but it was not seen in 20 tumors larger than 3 cm in diameter. In the 34 HCCs with a uniform histologic pattern, all of two minute tumors smaller than 1 cm in diameter consisted of extremely well-differentiated HCC, but there were no cases consisting of extremely well-differentiated HCC in tumors larger than 2 cm in diameter. Taken together, these findings suggest that HCCs originate as relatively well-differentiated tumors, which may be difficult to distinguish from adenomatous regenerative nodules, and become progressively less differentiated at a later stage of their development.

Aged↗