• Hippokratia · Apr 2017

    Case Reports

    Primary collision renal tumor of papillary renal cell carcinoma within an oncocytoma: emergency presentation of a rare entity.

    • K A Paschos, A Chatziaggelou, and A Chatzigeorgiadis.
    • Department of General Surgery, General Hospital of Drama, Drama, Greece.
    • Hippokratia. 2017 Apr 1; 21 (2): 105-107.

    BackgroundThe coexistence of an oncocytoma and a papillary renal cell carcinoma (PRCC) in the same neoplastic mass constitute a collision tumor and is an extremely rare entity. Until now, only six incidentally diagnosed cases have been reported, concerning patients older than 65 years.Case ReportA 57-year-old man was admitted to the Emergency Department with acute pain and anemia, due to renal hematoma following rupture of such a neoplastic collision mass. The patient underwent an emergency nephrectomy, which revealed a 10.6 cm oncocytoma and a 1.3 cm PRCC. He had an uncomplicated postoperative recovery and remained healthy at the 65-month follow-up, the longest of all previous cases.ConclusionWhile prognosis appears favorable, the current report shows that these collision tumors may cause emergency and dangerous medical conditions that deserve prompt treatment. HIPPOKRATIA 2017, 21(2): 105-107.

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