Extensive bone changes may occur in some patients who show evidence of chronic uremia. The chronic uremic state may be associated with congenital anomalies of the kidneys and the urinary ducts, congenital hydronephrosis, chronic cystic diseases of the kidneys and chronic interstitial nephritis. Renal osteodystrophy or renal rickets is seen uncommonly in children and rarely in adults. Amongst many thousands of troops examined in the orthopedic clinic of a large army station hospital, 1 case of renal osteodystrophy in an adult was discovered. REPORT OF CASE History.— V. J., a white man aged 20, was admitted to the orthopedic section of an army hospital on March 14, 1944. During a routine examination in February 1944, preparatory to overseas service, the soldier was referred to the orthopedic clinic because of the presence of unduly prominent clavicles. The patient was without subjective complaints. He revealed that at the time of his examination