We present four cases of primary spinal tumor in adolescents. Two patients had aneurysmal bone cyst, and two osteoblastoma. These tumors were found in the thoracic spine in one patient, and lumbar spine in 3. The patients consisted of four men, and their average age was 19 years old. Following resection of their tumors, spinal instrumentation was used in two patients because of massive destructive change in the lumbar spine. Average duration of the follow-up was 9 months. Although there has been no recurrence in all cases, further observation is necessary.
