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  • alkaptonuric ochronosis


A disease in which the metabolic products of phenylalanine and tyrosine accumulate, resulting in the deposition of homogentisic acid (a brown-black pigment) in the connective tissue. It occurs in alkaptonuria, but has also been observed in connection with exposure to certain chemicals (e.g., phenol, trinitrophenol, benzene derivatives).

Definition from: MeSH via Unified Medical Language SystemThis link leads to a site outside Genetics Home Reference. at the National Library of Medicine

A condition often associated with alkaptonuria and marked by pigment deposits in cartilages, ligaments, and tendons.

Definition from: Merriam-Webster's Medical DictionaryThis link leads to a site outside Genetics Home Reference. by Merriam-Webster Inc.

See also Understanding Medical Terminology.

Published: February 1, 2016