05Endocrine, nutritional or metabolic diseases Metabolic disorders Inborn errors of metabolism 5C50Inborn errors of amino acid or other organic acid metabolism 5C50.1Disorders of tyrosine metabolism
5C50.12
category
Tyrosinaemia type 2
Definition Tyrosinemia type 2 is an inborn error of tyrosine metabolism characterised by hypertyrosinemia with oculocutaneous manifestations (eye redness, photophobia, excessive tearing and pain, palmoplantar hyperkeratosis) and, in some cases, intellectual deficit.
Also indexed as
Hepatic tyrosine aminotransferase deficiency Keratosis palmoplantaris - corneal dystrophy Oculocutaneous tyrosinaemia Richner-Hanhart syndrome Tyrosinaemia type 2 Tyrosine transaminase deficiency
Nearby in Disorders of tyrosine metabolism
International Classification of Diseases, Eleventh Revision (ICD-11), World Health Organization (WHO) 2019/2021, https://icd.who.int/browse11. Licensed under Creative Commons Attribution-NoDerivatives 3.0 IGO (CC BY-ND 3.0 IGO).
Release 2026-01.
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This page reproduces WHO classification content for reference. It is not
medical advice and must not be used to diagnose or treat. For coding
decisions, consult the official release and your national coding guidelines.
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