Sacrococcygeal agenesis. A report of four new cases.

A total of 188 cases of sacral agenesis reported in the English literature are reviewed, and four new cases added. In 112 cases where the sex was given 60 were males, (53 per cent) and 52 were females (47 per cent). In 163 cases where clinical details were available, 47 children (26 per cent) had unilateral or bilateral dislocation of the hips, 77 (49 per cent) had unilateral or bilateral club-feet and 23 children (17 per cent) had spina bifida deformities. Comments are made on the aetiology, the clinical picture and the management.