1. Paralytic trunk deformities may be divided into three groups, depending upon the involvement of abdominal muscles and the quadratus lumborum.

Group I, unilateral paralysis of the abdominals and the quadratus lumborum, results in fixed paralytic pelvic obliquity with scoliosis convex to the paralyzed side.

Group II, unilateral paralysis of the lateral abdominals with intact quadratus lumborum, results in scoliosis convex toward the paralyzed side, but no fixed pelvic obliquity.

Group III, bilateral paralysis of recti abdominis and weakness of lateral abdominal and transverse muscles result in sagging abdomen, increased lordosis, forward tilting of pelvis, and horizontal sacrum.

2. Following correction by push-and-pull devices and turnbuckle plasters, supplemented if necessary by stripping operations to release contracted structures, permanent correction can be secured, not by fusion of the spine alone, but by the iliocostal fascial graft which effectively supports the tilted pelvis and helps to restore normal muscle balance to the involved trunk muscles. In some cases this should be supplemented by spine fusion.

3. Thirty-eight cases are reported in which forty-six fascial transplants were done with no mortality, and with excellent or good results in thirty cases.