In nine children with a myelomeningocele and fixed pelvic obliquity due
to uncorrectable lumbosacral scoliosis, a bilateral posterior iliac
osteotomy was done and a wedge of bone was transferred form the low side to
the high side of the pelvis. This produced a mean correction of 14 degrees
(41 per cent) of the pelvic obliquity and a mean correction of the trunk
list from the midline of seven centimeters (69 per cent). Two to seven-year
follow-ups showed that the correction was permanent, without tendency for
the obliquity to return as long as the scoliosis did not progress. The
procedure resulted in several complications, including fracture of the
pelvis and transient sciatic-nerve palsy; however, it provided a means of
correcting pelvic obliquity that could not be corrected by standard
procedures.