Iselin's disease commonly affects which populations?

• A. Girls 9-11 years
• B. Boys 11-14 years
• C. Both A and B
• D. Adults

Answer: (C)

Iselin's disease is a traction apophysitis at the calcaneal growth plate where the Achilles tendon attaches. It occurs in active children during periods of rapid growth, typically in late childhood to early adolescence. While it is more commonly reported in boys, it can occur in girls as well, so both age ranges listed are valid populations. Adults are not typical because the calcaneal apophysis has usually fused by then, removing the growth plate involved in this condition. Therefore, the best answer includes both the younger girls and the older boys groups.