Charting New Territory With a Novel WHO Provisional Category: A Case Study of a Low-Grade Oncocytic Tumor (LOT) in the Kidney.
A low-grade oncocytic tumor of the kidney (LOT) is a distinctive entity categorized under the 2022 World Health Organization (WHO) classification as "Other oncocytic tumors of the kidney." It represents a unique subset of oncocytic tumors, distinct from oncocytoma and chromophobe renal cell carcinoma. Characterized by bland oncocytic cells that diffusely express CK7 and lack CD117 expression, LOT typically manifests as a solitary, small lesion with a low stage. Available data suggest that LOT follows an indolent clinical course. Herein, we present a case of LOT in a 64-year-old male with a favorable course at a one-year follow-up. Understanding the clinical, morphological, and immunophenotypic features of LOT is paramount for accurate identification and characterization. This knowledge facilitates more conservative surgical and clinical management, optimizing patient care and outcomes.
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| http://dx.doi.org/10.7759/cureus.78132 | DOI Listing |
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