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Renal cell carcinoma associated with prominent angioleiomyoma-like proliferation: Report of 5 cases and review of the
Elisabetta Kuhn1, Jazmìn De Anda, Samanta Manoni
1Centro Consulenze Anatomia Patologica Oncologica, Centro Diagnostico Italiano, Milan, Italy.
Abstract:
Five cases of renal cell carcinoma of clear cell type are presented, Fuhrmann's grade 2, associated with a peculiar stromal proliferation having angioleiomyoma-like features. This proliferation was particularly prominent at the interphase between the tumor edge and the surrounding normal tissues, in which it acquired the configuration of a tumor capsule. Four similar cases were taken from the literature. We postulate that this angioleiomyoma-like change is a tumor epiphenomenon and that it represents yet another manifestation of the well-documented capacity of renal cell carcinoma to induce vascular proliferation, probably through the secretion of angiogenic and other growth factors by the tumor cells.
