ICD-11 definition : Tyrosinemia type 1 is an inborn error of amino acid metabolism characterized by hepatorenal
manifestations. The early-onset acute form of the disorder manifests between 15 days
and 3 months after birth with hepatocellular necrosis. Septicemia is a frequent complication.
Renal tubular dysfunction occurs and is associated with phosphate loss and hypophosphatemic
rickets. A later onset form has also been described and manifests with vitamin-resistant
rickets caused by renal tubular dysfunction.;
Tyrosinemia type 1 is an inborn error of amino acid metabolism characterized by hepatorenal
manifestations. The early-onset acute form of the disorder manifests between 15 days
and 3 months after birth with hepatocellular necrosis. Septicemia is a frequent complication.
Renal tubular dysfunction occurs and is associated with phosphate loss and hypophosphatemic
rickets. A later onset form has also been described and manifests with vitamin-resistant
rickets caused by renal tubular dysfunction.