title: Lethal hyperammonaemic coma due to ornithine transcarbamylase deficiency presenting as brain stem encephalitis in a previously asymptomatic ten-year-old boy.
mesh_terms: D000641:Ammonia / Q000097:blood*; D001933:Brain Stem; D002648:Child; D002956:Citrulline / Q000097:blood / Q000652:urine; D003128:Coma / Q000209:etiology*; D003937:Diagnosis, Differential; D004660:Encephalitis / Q000175:diagnosis; D006801:Humans; D008297:Male; D020163:Ornithine Carbamoyltransferase Deficiency Disease; D009963:Orotic Acid / Q000652:urine
chemical_list: D002956:Citrulline; D009963:Orotic Acid; D000641:Ammonia