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Zellweger syndrome in Saudi Arabia and its distinct features.

Clinical Pediatrics 1999 Februrary
Clinical and laboratory findings of Zellweger syndrome (ZS) patients diagnosed at King Faisal Specialist Hospital and Research Center (KFSH & RC), Riyadh, Saudi Arabia over a period of 10 years are presented in this report. Eleven patients (nine females and two males) from 2 to 4 months old were referred to KFSH & RC for evaluation of hypotonia, seizures, and dysmorphic features. The common clinical findings included high forehead, large fontanelle, shallow orbit ridges, micrognathia, upslanting palebral fissures, epicanthal folds, severe hypotonia, hyporeflexia, pigmentary retinopathy, optic nerve atrophy, complete or partial agenesis of corpus callusum, and failure to thrive. We did not observe any Brushfield spots, any renal and brain cysts, or adrenal insufficiency. Some unique clinical findings were the presence of gallstones, club feet, or bilateral knee or hip dislocation in some patients. All patients had markedly elevated plasma levels of very long chain fatty acids (VLCFA). Electron microscopy performed on liver biopsies of two patients revealed absence of peroxisomes. Biochemical studies of dermal fibroblasts from three patients showed deficient beta-oxidation of lignoceric acid and dihydroxyacetone phosphate acyltransferase (DHAPATase) activity. The tribal living in Saudi Arabia and our observation that 10 of the 11 parents in this study were first-degree relatives and, except for families 1 and 3, each family had at least another baby who died of the same disease. This suggests that the incidence of ZS in Saudi Arabia may actually be higher than our experience at KFSH & RC.

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