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to illustrate the clinical and biochemical heterogeneity of peroxisomal disorders, we report our experience with 27 patients seen personally between 1982 and 1997. Twenty patients presented with a phenotype corresponding either to Zellweger syndrome, neonatal adrenoleukodystrophy, or infantile Refsum disease, 3 of whom had a peroxisomal disorder due to a single enzyme defect. One patient had a mild form of rhzimelic chondrodysplasia punctata, 1 had classic Refsum disease. Finally, 5 patients presented with clinical manifestations that were either unusually mild or completely atypical, and initially did not arouse suspicion of a peroxisomal disorder. They showed multiple defects of peroxisomal functions with one or several functions remaining intact, suggesting a peroxisome biogenesis disorder. The defect in peroxisome biogensis was further characterized by variable expression in difference tissues and/or individual cells in 5 patients. Studies restricted to fibroblasts failed to identify abnormalities in this group. We demonstrate that clinical manifestations of peroxisomal disorders may be very mild or completely atypical, and therefore, peroxisomal disorders should be considered in a variety of clinical settings. Furthermore, we suggest performing extensive peroxisomal investigations in every patient suspected of suffering from peroxisomal disorder, even when the clinical presentation is typical. |
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cataracts,congenital
cultured skin fibroblasts
disability,neurological
failure to thrive
hearing loss
hepatomegaly
hypotonia
inborn errors of metabolism
nasal bridge,wide
neurologic disease,diagnoses of
neuropathy
peroxisomal disease
prognosis
psychomotor retardation
review article
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