[Primitive neuroectodermal tumor of the kidney manifested as a spontaneous hematoma].

Ultrasound and CT in a young man, admitted for violent left flank pain, revelead a large heterogeneous left renal mass, with hypodense collection along the psoas. The diagnosis was spontaneous renal hematoma. A check CT 3 weeks later found a large tumor of the inferior pole. After radical nephrectomy, histopathology diagnosed a primitive neuroectodermal tumor. The patient died one year later despite neoadjuvant chemotherapy. This article reports the clinical, radiological and histopathological aspect of a primitive neuroectodermal tumor of the kidney, compared with the other cases in literature.