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kangyuanyuan 离线
Maybe Renal Tubulocystic carcinoma ,low grade collecting duct carcinoma.but the result of IHC cause controversy.
mixture of tubules and microcysts with low grade nuclear features,tubules and cysts are lined by single layer of cuboidal or columnar cells with abundant eosinophilic cytoplasm, uniform nuclei with distinct nucleoli; often have hobnail appearance