Mucinous tubular and spindle cell carcinoma of kidney :a case series

Mucinous tubular and spindle cell carcinomas (MTSRCC ) of kidney is rare , low grade polymorphic tumor . Recent studies have described a wide morphological spectrum for this tumor. Prior to this these tumors  were diagnosed as variants of solid papillary carcinomas with compressed and elongated papillae, metanephric adenomas, and sarcomatoid carcinomas. Exact cell of origin is not well defined, evidences suggests that they arise from loop of henle or collecting duct epithelium. We report our clinical, histological, and immunohistochemical experiences with 3 such cases.