Collagen typte IV is a type of collagen found primarily in the basal lamina. Mutations to the genes coding for collagen IV lead to Alport syndrome. This will cause thinning and splitting of the glomerular basement membrane. It will present as isolated hematuria, sensorineural hearing loss, and ocular disturbances and is passed on genetically, usually in an X-linked manner. Liver fibrosis and cirrhosis are associated with the deposition of collagen IV in the liver. Serum Collagen IV concentrations correlate with hepatic tissue levels of collagen IV in sugjects with alcoholic liver disease and hepatitis C and fall following successful therapy.