Method
79 teenagers with cerebral palsy attending special schools were examined for deformities of the spine and the lower extremities with physical examinations and radiographic studies.

Results
The number of cases with scoliosis was 47 (59.5%) and the mean of Cobb's angle was 21.7 degrees. There were 42 joints (26.6%) of hip subluxation and 10 joints (6.3%) of hip dislocation out of 158 hip joints. The mean of migration percentage was 53.6%. 30 participants (38.0%) had pelvic obliquity. The coxa valga appeared in 147 hip joints (93.0%), with the mean of femur neck-shaft angle was 156.0 degrees. It had a casual link with migration percentage (p＜0.001). 131 knee joints (82.9%) had the increased popliteal angle and 113 knees (71.5%) had patella alta. 72 cases (91.1%) had equinus feet, and 49 cases (62.0%) had planovalgus feet deformities on radiographic studies. As the score of Gross motor function measure (GMFM) was decreased, the migration percentage (p＜0.01), the Cobb's angle (p＜0.01), the popliteal angle increased (p＜0.001) and femur neck- shaft angle (p＜0.05).

Conclusion
Teenagers with cerebral palsy are highly risk to develop musculoskeletal deformities in their spine and the lower extremities. Therefore, a close medical inspection should be paid on this group. (J Korean Acad Rehab Med 2008; 32: 135-142)