Immunohistochemical study of bcl-2, p53 and Ki-67 expressions in collecting duct carcinoma of the kidney. Five cases and review of the literature on bcl-2, p53 and Ki-67 expressions in renal cell carcinoma and transitional cell carcinoma.
OBJECTIVE
This study was designed to examine the expressions of bcl-2, p53 and Ki-67 antigen in collecting duct carcinoma (CDC) of the kidney by an immunohistochemical method.


METHODS
The diagnosis of CDC was based on the criteria proposed by Srigley and Eble. The clinical courses of 5 CDC cases examined in this study suggested that 3 cases were low grade and 2 cases high grade. The expressions of bcl-2, p53 and Ki-67 antigen were evaluated in paraffin-embedded surgical specimens using anti-bcl-2 and anti-p53 antibodies and Ki-67 antigen, respectively.


RESULTS
The expression of bcl-2 was recognized in 3 of 5 cases (60%), p53 expression also in 3 of 5 cases (60%). The Ki-67 labeling index was 7.46 +/- 7.40 (mean +/- SD).


CONCLUSIONS
It was suggested that there were two clinical types in CDC; the expression of bcl-2 did not correlate with the CDC patients' clinical courses and the cellular proliferation, and p53 expression was recognized in the CDC patients with highly cellular proliferation.
Department of Urology, Jichi Medical School, Kawachi-gun, Tochigi, Japan. urology@jichi.ac.jp
Kazumi
K
Suzuki
Akihiko
A
Tokue
D000368:Aged; D002292:Carcinoma, Renal Cell / Q000378:metabolism*; D002295:Carcinoma, Transitional Cell / Q000378:metabolism*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D019394:Ki-67 Antigen / Q000096:biosynthesis*; D007680:Kidney Neoplasms / Q000378:metabolism*; D007685:Kidney Tubules, Collecting; D008297:Male; D008875:Middle Aged; D019253:Proto-Oncogene Proteins c-bcl-2 / Q000096:biosynthesis*; D016159:Tumor Suppressor Protein p53 / Q000096:biosynthesis*
D019394:Ki-67 Antigen; D019253:Proto-Oncogene Proteins c-bcl-2; D016159:Tumor Suppressor Protein p53