Tumor with features of renal cell carcinoma and of transitional cell carcinoma

Excerpt

Sir, There is a precedent for the tumor with features of renal cell carcinoma and of transitional cell carcinoma reported by Terada and associates [2]. The previous report would be hard to discover with a literature search because of the title, “Atypical carcinoma of kidney possibly originating from collecting duct epithelium [1].” The renal medullary neoplasm reported by Chromie, Davis, and DeTure had features both of conventional renal cell carcinoma of the clear cell type and of transitional cell carcinoma, arising from the renal pelvis. Both components were periodic acid-Schiff positive. The authors foresaw the additional methodologies needed to study the lesion. Based upon current standards, the neoplasm would not be classified as a carcinoma of collection duct origin. Their report was, however, a seminal event in the development of the concept of collection duct carcinomas, as it suggested the possible origin of neoplasms from collection ducts. …