Forty-three cases of surgically treated lumbar disc protrusion in patients 21 years or younger are analyzed. The results were generally good. Ten percent of the patients required reoperation within 3 years. No major complications were experienced. Follow-up observation ranged from 4 to 30 years. Disc protrusion should be considered in the differential diagnosis of children with back and sciatic pain, and early myelography should be carried out in the refractory case. The symptoms, signs, myelograms, and surgical findings are usually similar to those of the adult patient with a disc protrusion.