Mixed Neuroendocrine Carcinoma and Urothelial Carcinoma of the Upper Urinary Tract: A Case Report and Literature Review
Year: 2025
Type: article
Study design: Case Report
Abstract: We describe a rare case of high-grade divergent urothelial carcinoma (UC) of the renal pelvis with neuroendocrine differentiation, specifically a small cell carcinoma (SCC) component. A 70-year-old male who presented with frank hematuria underwent a thorough clinical workup including computed tomography (CT) scan, which showed a large, contrast-enhancing obstructive right renal mass. The mass, when analyzed microscopically, showed two distinct components: high-grade urothelial carcinoma and SCC. Immunohistochemistry analysis confirmed primary dual morphological subtypes and ruled out a metastatic source. Mixed SCC and UC of the renal pelvis are extremely rare diagnoses, and staging of these tumors is difficult, highlighting the importance of integrated diagnostic approaches for an accurate characterization of complex renal tumors.
Source: Cureus
DOI: 10.7759/cureus.80275
Authors: Maram R Alharbi, Abdelrazak Meliti, Astabraq Alomran
Institution: King Faisal Specialist Hospital & Research Centre
Language: English
Subfield: Surgery
Field: Medicine
Domain: Health Sciences
Open Access status: diamond
OpenAlex ID: W4408259152