Absence of the sacrum is an extremely rare condition. Only six cases have been found recorded or referred to after a thorough search of the literature. The appearance of this abnormality in a clinic is worthy of note.
REPORT OF CASE
History.
—A Mexican boy, aged 6 years, admitted to the Children's Hospital in October, 1922, had no control of the bladder and bowels. He had double club feet and some deformity in the region of the lower spine at the time of birth. Tenotomies were performed on the feet when the child was 2 days old, and a moderate correction was obtained.The birth of the patient had been normal at term. He sat up alone at 18 months, and walked at 2 years. Dentition was normal. He had had no contagious diseases or other illnesses. He talked plainly, was very active on his feet and was said to