SACRAL AGENESIS

BECAUSE of the relatively infrequent occurrence of absence of the sacrum, this case is presented. A comprehensive review of the literature is given by Zeligs.¹

REPORT OF A CASE

An infant girl of 8 months (fig. 1) had, in addition to the deformity of the spine, bilateral clubfoot, myelomeningocele and hydrocephalus. The abdominal and thoracic viscera were examined. Grossly, the only abnormality observed was the fusion of the kidneys, which were displaced to the left side. On dissection of the lower extremities the peripheral nerves and muscles appeared normal. Microscopic sections were made from representative areas of the central and peripheral nervous systems as well as from muscle groups of the lower extremity. Because of degenerative changes of the nerve tissue an accurate study could not be made. The muscles and tendons, on the other hand, had not undergone excessive degeneration. The striated muscle and tendon appeared to be