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Papillary renal cell carcinoma
Definition
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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
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Second most common RCC subtype
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Ten to 15% of all RCCs
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Age distribution similar to clear cell RCC
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Male predominance (male-to-female ratio, 2:1 to 4:1)
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