Urinary-free amino acids in osteogenesis imperfecta.

Free urinary amino acids were analyzed in patients with osteogenesis imperfecta to determine whether there were any abnormalities that could be used to improve the diagnosis and classification of this syndrome. The results obtained from 15 patients, who had either the type 1, 2, or 3 form of osteogenesis imperfecta, were compared to the values obtained from 115 age-matched controls. Elevated free amino acid levels were not found in any patient with osteogenesis imperfecta.