Thyroid-Like Follicular Carcinoma of the Kidney: A Case Report of a Novel and Emerging Entity

Abstract Thyroid-like follicular carcinoma (TLFC) of the kidney is an extremely rare type of primary renal cell carcinoma, although not been included in the recent WHO classification, but this tumor is considered as a novel and emerging entity in the Genitourinary Pathology Society (GUPS) update. Morphologically the tumor closely resembles follicles of thyroid carcinoma. While the clinical behavior is uncertain due to its rarity, most of them are of low-grade and indolent. In this case report, we document a rare case of TLFC with a short review of the literature to avoid misdiagnosis and add some to the preexisting knowledge. Keywords: Thyroid-like follicular carcinoma, Immunohistochemistry, Renal cell carcinoma.