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Mucolipidosis type IV: clinical spectrum and natural history.

Abstract
The clinical spectrum and developmental features of mucolipidosis type IV, a recessive lysosomal storage disorder, are presented. The evaluation was based on information from the clinical charts and information obtained from the families of 20 patients between the ages of 2 to 17 years. The clinical manifestations of the disease, profound psychomotor retardation and visual impairment, appear during the first year of life. Definitive diagnosis is made by electron microscopy which reveals storage organelles typical of the mucolipidoses. This study details, for the first time, the heterogeneity of the ophthalmologic features, specifically as pertains to the age of onset, degree and clinical course of the corneal opacities, and the retinal involvement. Although the top developmental level was found to be 12 to 15 months in language and motor function, the course of the disease is protracted for some children, who show only a slight improvement, and others, little if any deterioration despite the early infantile onset of the disease. This presentation provides guidelines for the clinical diagnosis of mucolipidosis type IV.
AuthorsN Amir, J Zlotogora, G Bach
JournalPediatrics (Pediatrics) Vol. 79 Issue 6 Pg. 953-9 (Jun 1987) ISSN: 0031-4005 [Print] United States
PMID2438637 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
Topics
  • Adolescent
  • Body Height
  • Body Weight
  • Child
  • Child, Preschool
  • Corneal Opacity (genetics)
  • Developmental Disabilities (genetics)
  • Female
  • Genes, Recessive
  • Humans
  • Jews
  • Language Development Disorders (genetics)
  • Male
  • Mucolipidoses (diagnosis, genetics)
  • Psychomotor Disorders (genetics)
  • Vision Disorders (genetics)

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