Vertebral abnormalities associated with congenital sacrococcygeal teratomas.

An orthopedic and radiologic follow-up study was performed on 45 patients who had undergone surgery for a benign congenital sacrococcygeal teratoma (SCT). Eighty percent of the patients had one to three vertebral abnormalities at the mean age of 21 years. Extrapelvic primary tumors were associated with subsequent development of spondylolysis in the lumbosacral spine, and intrapelvic primary tumors were associated with multiple spina bifida occulta lesions and other spinal anomalies. In addition, an increased incidence of congenital dislocation of the hip (7%) was observed in patients with SCTs.