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Bilharzial pyelitis: a rare cause of secondary ureteropelvic junction obstruction.

Fibrosis at the ureteropelvic junction (UPJ) is reported to cause secondary UPJ obstruction. This fibrosis may result from urinary extravasation after trauma or renal surgery, or it may be caused by healing following specific infections such as tuberculosis. Similarly, unfavorable healing of bilharzial lesions of the urinary tract with fibrosis usually results in stricture formation that leads to obstructive uropathy. Strictures commonly affect the pelvic part of the ureter and to a lesser extent the lumbar part. We report a rare case of UPJ obstruction secondary to fibrosis induced by bilharzial infestation.