Anteroposterior (A) and lateral (B) illustration showing pin placement in osteochondritis dissecans of the knee in skeletally immature patients. (Redrawn from Donaldson LD, Wojtys EM: Extraarticular drilling for stable osteochondritis dissecans in the skeletally immature knee, J Pediatr Orthop 28:831–835, 2008.) SEE TECHNIQUE 32.13.