Erschienen in:
01.05.2004 | Letter to the Editor
Reply to the letter by Dr. E.N. Beckman
verfasst von:
Tadashi Terada
Erschienen in:
Virchows Archiv
|
Ausgabe 5/2004
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Excerpt
Sir, I am very grateful to Dr. Beckmann for informing me of a precedent case [
1] similar to our previous report [
3]. I had not been able to detect the case by computer-aided reference search [
3]. Chromie, Davis, and Deture [
1] reported in 1979 an atypical kidney tumor with cellular elements of renal cell carcinoma (RCC) and transitional cell carcinoma (TCC). The kidney carcinoma consisted of a mixture of renal clear cell carcinoma-like cells and TCC-like cells [
1]. The latter involved the renal pelvis and showed occasional papillary configurations. Both malignant cells were positive with periodic acid-Schiff and negative for epithelial mucin. No definite features were obtained using an electron microscope. They suggested three hypotheses [
1]. The first was that the atypical carcinoma was RCC, which strikingly mimicked papillary TCC, projecting the pelvis. The second was that the carcinoma was TCC with tubular features. The third was that the carcinoma originated from the collecting duct epithelium. They preferred the third hypothesis. Our case [
3] is very similar to theirs [
1]. I admit that their report is a precedent for our case. However, our case is different from collecting duct carcinoma (Bellini duct carcinoma), which shows features of tubular and papillary proliferations of carcinoma cells resembling collecting duct epithelium [
2]. In addition, we could not demonstrate that our tumor originated from collecting duct epithelium. In any event, further studies using new methods are required to reveal the histogenesis of such atypical kidney carcinomas with RCC and TCC components. …