Estrogen and progesterone receptors exist in the epithelial and stromal cells of the endometrium. Proliferative disorders of the endometrium may be associated with autocrine and paracrine actions of estrogen and progesterone in epithelial and stromal cells. This study was performed to evaluate the differences estrogen and progesterone receptor(ER/PR) expression in the epithelial and stromal cells of endometrial hyperplasias and adenocarcinomas using immunohistochemical methods. Immunohistochemical analysis of proliferating cell nuclear antigen(PCNA) was done to evaluate a possible correlation between PCNA and hormone receptor expression. Evaluation was based on samples from 31 simple hyperplasias, 30 complex hyperplasias, and 32 adenocarcinomas. The immunohistochemical expression of ER, PR and PCNA in epithelial and stromal cells were examined according to a scoring system based on the percentage of positive cells and the staining intensity. The results were as follows; 1) The expression of ER and PR in epithelial cells showed a graded, significant decreases in simple hyperplasia, complex hyperplasia and endometrial carcinoma, in that order(ER: P=0.008, PR: P= 0.026). 2) PR expression in the stromal cells showed a significant decrease between hyperplasia and adenocarcinoma(P=0.003). The difference in ER expression was not significant. 3) In stromal cells, the decrease in PR expression was more prominent than the decrease in ER expression when complex hyperplasia was compared to simple hyperplasia. 4) The PCNA expression in simple and complex hyperplasia and adenocarcinoma was not higher than the expression of PCNA in nomal proliferative endometrium. There was no significant difference in PCNA expression between simple and complex hyperplasia and adenocarcinoma(P=0.073). 5) A negative correlation between PCNA and ER/PR expression was not demonstrated in simple and complex hyperplasia, or in adenocarcinoma. Endometrial hyperplasia and adenocarcinoma are probably related to a paracrine action of estrogen and progesterone in epithelial and stromal cells. A progressive loss of PR expression in stromal cells may induce abnormal proliferation of endometrium due to a disrupted hormonal balance.
Adenocarcinoma

No abstract available.
Adenocarcinoma*

No abstract available.
Adenocarcinoma

No abstract available.
Adenocarcinoma*

Primary gallbladder carcinoma is generally assumed as uncommon but dismal malignancy. Only sporadic studies about pathologic features of the gallbladder carcinoma have drawn pathologists attention especially in association with cholelithiasis. Currently, we have focused much on the role of metaplastic changes in diseased gallbladders including cholecystitis with or without cholelithiasis, and raised its implication in the development of benign or malignant neoplasm. The authors reviewed 34 cholecystectomy cases with primary gallbladder carcinoma, and their histologic findings were analyzed with reference to the association of metaplastic changes both in tumor and adjacent nonneoplastic mucosal epithelium. Association with gallstones and metaplastic changes in the surrounding nontumorous mucosa is more frequent in intestinal typen than in non-intestinal type (P<0.05). Gallstones may play a role of irritant stimuli to the gallbladder mucosa which can be eventually reconstructed with more resistant cell type. And the subsequent increase in absorptive capacity and accumulation of carcinogenic substance may result in malignant transformation of (reserve) cells in replication zone. At this time we can assume that association of cholelithiasis and presence of metaplastic changes are in parallel relationshop in intestinal type adenocarcinoma. Intestinal type adenocarcinomas are usually papillary (72.7%) especially in superficial portion, but deeper area also shows infiltrative growth focally. This finding is comparable to intestinal type gastric carcinoma which represents frequently a polypoid and papillary growth pattern. With these results, as in the gastric carcinoma it is strongly supported that intestinal metaplasia may play a major role as a precancerous lesion in a minor group of the gallbladder adenocarcinoma. Controlled prospective study on biological behavior of intestinal type adenocarcinoma should be followed with more cumulative cases.
Adenocarcinoma

No abstract available.
Adenocarcinoma*

BACKGROUND: It has long been recognized that birefringent paticles (BP) are associated with pulmonary disease. And there is increasing evidence that BP cause fibrotic reaction within the lung depending on both particle size and composition. METHODS: We collected 41 cases of usual interstitial pneumonia (UIP) and 101 cases of normal lung tissue from control group including squamous cell carcinoma, adenocarcinoma and bullae. BPs in the 0.1 to 10 micrometer size range under polarizing microscope was measured and counted by image analyzer. RESULTS: BP counts are mean 244.05/10 HPF in UIP and 71.4/10 HPF in control group. BPs in UIP is three times more than control (p=0.000). It increased significantly by the age of patients (p=0.000). CONCLUSIONS: BPs in lung might be important cause of inflammation and fibrosis in UIP.
Adenocarcinoma

Association of the hepatoid and choriocarcinomatous components in adenocarcinoma of the stomach is extremely unusual and raises a possibility of new approach understand the histogenesis of gastric hepatoid adenocarcinoma. This paper describes a Borrmann type III adenocarcinoma of the stomach with both choriocarcinomatous and hepatoid components in composite tumor pattern in a 50-year-old man. Tubular arrangement of differentiated embryonalcarcinoma was encountered in choricarcinomatous and hepatoid areas, which showed strong immunoreactivity to beta-HCG and AFP, respectively. The findings suggest that gastric adenocarcinoma may have a potential of differentiation toward embryonal carcinoma. from which both choriocarcinoma and hepatoid variant of gastric adenocarcinoma may develop by retrodifferentiation.
Adenocarcinoma

As flow cytometric analysis using paraffin-embedded tissue was developed by Hedley et al in 1983, retrospective study with large amount of archival material was possible. Many literatures reported that the result of paraffin embedded tissue was compatible with that of fresh tissue. We compared the DNA histograms of 26 cases of colorectal adenocarcinoma in which the analysis was done in both fresh and paraffin-embedded tissues. Aneuploidy in fresh and paraffin-embed-ded tissues was 73.0% and 50.0%, respectively. The concordance rate of fresh and paraffin-em-bedded tissues was 76.8% and six interpreters were agreed in 73.0% of the cases. Because flow cytometric DNA analysis using fresh tissues can detect more aneuploid population than in paraffin-embedded tissue, the former is strongly recommeded in DNA ploidy study. Also careful observation using standard criteria may improve the interpretation of DNA histogram.
Adenocarcinoma

No abstract available.
Adenocarcinoma*