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Transitional cell carcinoma of the renal pelvis with chriocarcinomatous differentiation. Immunohistochemical and immunoelectron microscopic assessment of human chorionic gonadotropin production by transitional cell carcinoma of the urinary bladder
Author(s) -
Grammatico Dino,
Grig David J.,
Eberwein Parker,
Shepherd R. Roderick,
Hearn Stephen A.,
Walton John C.
Publication year - 1993
Publication title -
cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.052
H-Index - 304
eISSN - 1097-0142
pISSN - 0008-543X
DOI - 10.1002/1097-0142(19930301)71:5<1835::aid-cncr2820710519>3.0.co;2-5
Subject(s) - transitional cell carcinoma , medicine , human chorionic gonadotropin , urinary bladder , immunohistochemistry , renal pelvis , urology , pathology , carcinoma , hormone , cancer , ureter , bladder cancer
Abstract Background . There have been 12 documented cases of choriocarcinoma arising in the urinary bladder, either alone or in combination with other epithelial tumors. It has been shown that some high‐grade transitional cell carcinomas (TCC), without obvious syncytiotrophoblastic elements, can produce human chorionic gonadotropins (HCG). Methods . A case of choriocarcinoma, in association with high‐grade TCC of the renal pelvis, was encountered in an 80‐year‐old man. For additional evaluation of HCG production by TCC, 25 consecutive cases of invasive high‐grade TCC of the bladder were stained with an anti‐HCG antibody. Immunogold staining also was performed in two of the cases studied. Results . Immunoperoxidase staining of the renal pelvis tumor showed focal positivity for HCG within the TCC and a more intense reaction as the tumor cells differentiated into choriocarcinoma elements. Seven of the 25 cases (28%) displayed varying degrees of reactivity within individual cells or groups of cells. In an additional case, typical syncytiotrophoblastic giant cells without cytotrophoblasts were seen in a high‐grade TCC. Immunogold studies demonstrated positive labeling in the cytoplasm of carcinoma cells in a case of TCC without syncytiotrophoblasts and in the syncytiotrophoblastic giant cells in the one case in which these were present. Conclusions . The findings support a metaplastic origin of cases of choriocarcinoma arising primarily in the urothelial tract.