Primitive neuroectodermal tumor of the kidney revealed by a spontaneous hematoma

Ultrasound and CT in a young man, admitted for violent left flank pain, rev elead a large heterogeneous left renal mass, with hypodense collection alon g the psoas. The diagnosis was spontaneous renal hematoma. A check CT 3 wee ks later found a large tumor of the inferior pole. After radical nephrectom y, 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 neur oectodermal tumor of the kidney, compared with the other cases in literatur e.