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  • Title: Clinical and laboratory study in 22 patients with inherited hyperammonemic syndromes.
    Author: Rottem M, Statter M, Amit R, Brand N, Bujanover Y, Yatziv S.
    Journal: Isr J Med Sci; 1986 Nov; 22(11):833-6. PubMed ID: 3793440.
    Abstract:
    Twenty-two patients with inherited hyperammonemic syndromes are presented. These patients represent 22 different families. The diagnosis was based mainly on family history, blood ammonium levels, acid base balance, urinary orotic acid, urinary and plasma amino acids and organic acids. The final diagnosis was confirmed by determination of liver enzyme activity. In 12 patients (54%), the first clinical manifestations were noticed after the neonatal period; 7 patients (31%) were diagnosed after infancy, and 8 (23%) after the age of 8 years. Two patients who represent the late-onset group of inherited hyperammonemic syndromes are presented in detail. The three most common diagnoses were ornithine transcarbamoylase deficiency, carbamoyl phosphate synthetase deficiency, and lysinuric protein intolerance, which comprised 59% of the diagnosed patients. Our data, based on one of the largest series reported, reveal a relatively large percentage of late-onset inherited hyperammonemic syndromes as compared with previous reports.
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