Alport syndrome


Alport Syndrome is an autoimmune disorder affecting Type 4 Collagen that includes kidney disease, hearing loss, and eye abnormalities. The genetic disease classically also manifests with hematuria and proteinuria as the disease progresses to ESRD. The issues are related to a mutation in the COL4A5 (collagen) gene and are inherited in an X-linked pattern.[1]

Clinical Features

The degree of clinical features are related to the severity of the organ systems involved. Most common patient will have:

Differential Diagnosis


  • Urologic (lower tract)
    • Any location
    • Ureter(s)
      • Dilatation of stricture
    • Bladder
      • Transitional cell carcinoma
      • Vascular lesions or malformations
      • Chemical or radiation cystitis
    • Prostate
    • Urethra
      • Stricture
      • Diverticulosis
      • Foreign body
      • Endometriosis (cyclic hematuria with menstrual pain)
  • Renal (upper tract)
    • Glomerular
    • Nonglomerular
      • Interstitial nephritis
      • Pyelonephritis
      • Papillary necrosis: sickle cell disease, diabetes, NSAID use
      • Vascular: arteriovenous malformations, emboli, aortocaval fistula
      • Malignancy
      • Polycystic kidney disease
      • Medullary sponge disease
      • Tuberculosis
      • Renal trauma
  • Hematologic
  • Myoglobinuria - positive blood, no RBCs: rhabdomyolysis
  • Hemoglobinuria - positive blood, no RBCs
  • Miscellaneous
    • Eroding abdominal aortic aneurysm
    • Malignant hypertension
    • Loin pain–hematuria syndrome
    • Renal vein thrombosis
    • Exercise-induced hematuria
    • Cantharidin (Spanish fly) poisoning
    • Stings/bites by insects/reptiles having venom with anticoagulant properties
    • Schistosomiasis
    • Sickle Cell Trait




See Also

External Links


  1. ↑ Kashtan CE. Familial hematurias: what we know and what we don't. Pediatr Nephrol. 2005 Aug;20(8):1027-35.