Postrenal: Differential

• • Tubular Obstruction:
  • Crystals: Uric acid, Calcium oxalate, Acyclovir, Sulfonamide, Methotrexate, Myeloma light chains
  • Ureteral Obstruction:
  • Retroperitoneal tumor
  • Retroperitoneal fibrosis: Methysergide, Propranolol, Hydralazine
  • Urolithiasis
  • Acute Papillary Necrosis
  • Urethral Obstruction:
  • Stricture
  • Benign prostatic hypertrophy
  • Tumor: Prostate, Cervical, Bladder, Colorectal
  • Bladder Hematoma
  • Bladder Stone
  • Obstructed Foley Catheter
  • Neurogenic Bladder: CVA, MS, Spinal Cord Tumor, Trauma, Autonomic Neuropathy, Anti-cholinergics