Post-renal Failure

Causes of Postrenal Failure

Intratubular obstruction

• • Uric acid nephropathy

  • Methotrexate crystal deposition

Ureteric obstruction

• • Retroperitoneal carcinoma (cervix, prostate, uterus) or sarcoma

  • Retroperitoneal fibrosis

Intrinsic causes

• • Nephrolithiasis

  • Necrotic papillae (papillary necrosis)

  • Blood clots

Urethral obstruction

• • Prostatic hypertrophy

  • Blood clots

  • Bladder dysfunction (e.g., flaccid bladder in diabetes)

  • Blocked Foley catheter