- Primary Undifferentiated Carcinoma of the Endometrium with Small Cell and Trophoblastic Differentiation.
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Chul Hwan Kim, Seoung Hye Park, In Sun Kim, Seung Yong Paik
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Korean J Pathol. 1990;24(1):58-64.
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 Abstract
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- This report describes a very rare case of primary undifferentiated carcinoma of the endometrium with small cell and trophoblastic differentiation. The patient was 54-year-old woman with complaints of vaginal bleeding and palpable lower abdominal mass. The light microscopic findings revealed predominantly small cells with round nuclei, spindle cells, and large cells with hyperchromatic bizarre nuclei. Foci of syncytiotrophoblastic giant cells are scattered, especially in the hemorrhagic areas.
Immunohistochemical stainging for neuron specific enolase and beta-hCG showed positive reactions to small cells and syncytiotrophoblastic giant cells, respectively. Argentaffin and argyrophil stains, however, showed negative reactions to small cells. The histogenesis of small cell undifferentiated carcinoma of the endometrium remains unclear; however, it may arise from epithelial precursors instead of neuroendocrine cells, and syncytiotrophoblastic cells may be differentiated or dedifferentiated from the undifferentiated carcinoma cells.
- Immunohistochemical Study on the Blood Group A, B and H in Colonic Adenocarcinomas.
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Seoung Hye Park, Kap No Lee, Seung Yong Paik
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Korean J Pathol. 1988;22(1):31-41.
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Abstract
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- Blood group isoantigens (BGS) A, B and H comprise a group of carbohydrate cell surface markers found not only on the erythrocytes but in wide variety of epithelial cells and body fluid on 80% of the human population. There has been increasing interest in the changes in blood group A, B and H antigen expression in various epithelial malignancies. These changes included deletion of A, B determinants, accumulation of precursor substances, increment or neosynthesis of imcomplete blood group antigens and synthesis of sialylated substances bearing blood group carbohydrate chains. Also these changes have been explained as an evidence of immunologic dedifferentiation analogous to the morphologic dedifferenctiation of anaplasia. isoantigens may be altered in epithelial tissues that show repair and regeneration, metaplastic changes and dysplasia. We studied that the changes of blood group isoantigens A, B and H in 30 cases of adenocarcinoma of the colon, 27 cases of adjacent mucosa and 19 cases of metastatic lymph nodes by immunohistochemical study. In ascending, transverse and rectosigmoid colon, the blood group isoantigens A, B and H are positive in 57.1%, 0% and 57.1% of adenocarcinomas and 100%, 50% and 0% in adjacent mucosae, respectively. In ascending colon,the frequency of the metastasis and recurrences in Blood group isoantigen positive and negative cases are 75% and 66.6% and in rectosigmoid colon, those are 50.5% and 90.0%, respectively. In tumors of the ascending colon, there was no significant correlation between antigen content and frequency of metastasis. However, the cancer of the rectosigmoid colon with bloodgroup isoantigen positive were associated with a lower frequency of metastasis than those without blood group isoantigen. (p=0.045). The data suggests that the immunohistochemical studies of blood group isoantigen may be of value in estimating the clinical behavior of certain colon carcinoma.
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