title: Hyperammonemia (ornithinemia) presenting as a unilateral cerebral mass lesion.
mesh_terms: D000592:Amino Acid Metabolism, Inborn Errors / Q000175:diagnosis* / Q000473:pathology; D000641:Ammonia / Q000097:blood*; D001253:Astrocytes / Q000473:pathology; D001927:Brain Diseases / Q000175:diagnosis* / Q000473:pathology; D001932:Brain Neoplasms / Q000175:diagnosis*; D002222:Carbamoyl-Phosphate Synthase (Ammonia) / Q000172:deficiency; D002540:Cerebral Cortex / Q000473:pathology; D002675:Child, Preschool; D003937:Diagnosis, Differential; D007839:Functional Laterality; D005910:Glioma / Q000175:diagnosis*; D006801:Humans; D008297:Male; D009952:Ornithine / Q000097:blood; D013577:Syndrome
chemical_list: D000641:Ammonia; D009952:Ornithine; D002222:Carbamoyl-Phosphate Synthase (Ammonia)