Percutaneous epiphysiodesis for arresting growth is a useful method for equalising moderate lower limb-length discrepancy. This paper reviews the result of this procedure performed at the Royal Hospital for Sick Children in Glasgowfrom 1989 to 1993. There were 8 children (5 girls and 3 boys) ranging in age (chronological) from 10 years 3 months to 13 years 3 months. Limb-length discrepancies (LLD) at the time of surgery were between 2.5 cm to 5.5 cm. The predicted LLD at maturity was obtained using the Moseleys graph. This ranged from 3.9 cm to 8.3 cm. The cause of discrepancy were hemihypertrophy (5), neurofibromatosis (1), AV malformation (1) and neonatal osteomyelitis (1). Bone age in 3 patients corresponded to their chronological age. In 2 patients their bone age were less than their chronological age by 1 year. In the remaining 3 patients their bone were less than their chronological age by 1 to 3 years. All patients had percutaneous epiphysiodesis of both the distal femur and proximal tibia. All patients except one had afinal LLD of 1 cm or less. There were 2 unsatisfactory results: one girl had a valgus knee due to asymmetric physeal closure. Another boy had a final LLD of 3.3 cm as the procedure was done near skeletal maturity. This technique is useful even with LLD greater than 5 cm in children whose predicted height is above average. The difference between chronological age and bone age ranged from I to 3 years.