Category Pathology

Tubulocystic carcinoma

Definition A renal carcinoma with predominantly tubulocystic structures Clinical features Epidemiology A rare variant of kidney epithelial neoplasm, <1% of renal cell carcinomas Patients range in age from 30 to 80 years (mean age, 57.2 years) Male predominance with an…

Mucinous tubular and spindle cell carcinoma

Definition Low-grade renal epithelial neoplasm composed of tubules, spindle cells, and extracellular mucin Clinical features Epidemiology Usually occurs in adults, with a wide age range of 17–82 years (mean, 53 years) Occurs predominantly in female patients (male-to-female ratio, 1:4) You’re…

Mit family translocation renal cell carcinoma

Definition Subtype of renal cell carcinoma harboring gene fusions involving two members of MiT family transcription factors, TFE3 (with Xp11 translocation), and TFEB (with t(6;11) translocation) Clinical features Epidemiology The majority of cases are reported in children and young adults.…

Renal medullary carcinoma

Definition Highly aggressive type of renal cell carcinoma centered in the medulla, associated with the sickle cell trait and hemoglobinopathies Clinical features Epidemiology Affects young adults in their second to third decades of life, with male-to-female ratio of 2:1 Most…

Collecting duct carcinoma

Definition A highly aggressive type of renal carcinoma originating from collecting duct epithelium; also known as carcinoma of the collecting ducts of Bellini Clinical features Epidemiology Less than 1% of renal cancers Occurs mostly in adults; rare cases reported in…

Chromophobe renal cell carcinoma

Definition A renal cell carcinoma (RCC) subtype comprising large pale and/or eosinophilic cells with prominent cell borders, irregular nuclei, and perineuclear halos Clinical features Epidemiology Five percent of RCCs Mean age, 50–60 years (range, 30–90 years) Male-to-female ratio, 1.5:1 You’re…

Papillary renal cell carcinoma

Definition A histological subtype of renal cell carcinoma (RCC) with predominant tubulopapillary architecture and characteristic genetic changes; 1.5 cm is the size threshold for papillary RCC; smaller low-grade lesions without fibromuscular pseudocapsule are classified as papillary adenoma. Clinical features Epidemiology…