" /> Alkaptonuria - CISMeF





ICD-11 code : 5C50.10;

Preferred Label : Alkaptonuria;

ICD-11 definition : Alkaptonuria is characterised by the accumulation of homogentisic acid (HGA) and its oxidised product benzoquinone acetic acid (BQA), leading to a darkening of the urine when it is left exposed to air, grey-blue colouration of the eye sclerae and the ear helix (ochronosis), and a disabling joint disease involving both the axial and peripheral joints (ochronotic arthropathy).;

ICD-11 synonym : Homogentisic acid oxidase deficiency; alcaptonuria; Ochronosis; Homogentisate 1,2-dioxygenase deficiency;

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Alkaptonuria is characterised by the accumulation of homogentisic acid (HGA) and its oxidised product benzoquinone acetic acid (BQA), leading to a darkening of the urine when it is left exposed to air, grey-blue colouration of the eye sclerae and the ear helix (ochronosis), and a disabling joint disease involving both the axial and peripheral joints (ochronotic arthropathy).

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06/05/2025


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