24 resections of a talocalcaneal coalition in 22 pediatric or adolescent patients were carried out. The coalition was located at the medial joint facet in 18 cases and in the dorsomedial talocalcaneal region in seven cases (in one patient combination of both). Three patients presented with an additional calcaneonavicular coalition. A talocalcaneal bone bridge of the entire joint was found in five cases. In seven patients an intramuscular lengthening of the gastrocnemius muscle was necessary. In nine patients a calcaneal lengthening procedure, and in five patients a calcaneal sliding osteotomy were added. A lengthening in the region of a calcaneocuboid synostosis was untertaken in one case. After a mean follow-up of 21.2 months 17 patients are completely or nearly pain-free. Five patients still complain of pain, but are improved. Two patients were lost to follow-up.