title: Alkaptonuric ochronosis presenting as palmoplantar pigmentation.
abstract: We describe a 37-year-old woman who presented with palmoplantar pigmentation, thickening and pitting of 4 years duration. Bluish pigmented patches were seen over the sclera of her eyes. Her lumbar spine showed typical calcification of the intervertebral discs. Addition of Benedict's reagent to a urine sample of the patient gave rise to greenish brown precipitate and brownish black supernatant. Alkalinization of urine turned it black. A biopsy of the palmar lesion demonstrated irregular breaking up, swelling and homogenization of collagen bundles in the reticular dermis. Yellow-brown (ochre coloured) pigment was seen lying within the collagen bundles and also freely in the deeper dermis confirming our clinical diagnosis of alkaptonuric ochronosis. To the best of our knowledge this is probably the second report of alkaptonuria presenting with palmoplantar pigmentation.
authors.affiliation: Department of Dermatology and STD, Department of Radiodiagnosis, Jawaharlal Institute of Postgraduate Medical Education and Research (JIPMER), India.
authors.forename: M
authors.initials: M
authors.lastname: Vijaikumar
authors.forename: D M
authors.initials: DM
authors.lastname: Thappa
authors.forename: S
authors.initials: S
authors.lastname: Srikanth
authors.forename: G
authors.initials: G
authors.lastname: Sethuraman
authors.forename: S
authors.initials: S
authors.lastname: Nadarajan
mesh_terms: D000328:Adult; D000474:Alkaptonuria / Q000150:complications* / Q000235:genetics; D005260:Female; D005533:Foot Dermatoses / Q000209:etiology*; D005808:Genes, Recessive; D006229:Hand Dermatoses / Q000209:etiology*; D006801:Humans; D009794:Ochronosis / Q000150:complications*; D010859:Pigmentation Disorders / Q000209:etiology*; D011379:Prognosis; D013128:Spinal Osteophytosis / Q000209:etiology