Aspergillus mycetoma of the renal pelvis associated with ureteropelvic junction obstruction.

A case of aspergillosis of the kidney is described that could not be attributed to any of the factors that classically predispose to fungal infection (immunosuppressive, antibiotic or steroid therapy and diabetes). The patient did have severe obstruction of the ureteropelvic junction, which we believe caused stasis of urine and, in turn, the propagation of a colony of Aspergillus.