Calcaneonavicular Coalition Excision and Interposition of the Dorsal Half of the Extensor Digitorum Brevis: A Technique Tip

Calcaneonavicular coalition is a congenital coalition caused by failure of embryonic segmentation, leading to an abnormal connection between the calcaneus and the navicular bones. If symptomatic with no evidence of arthritis, surgical excision is thought to be the best operative option. Extensor digitorum brevis interposition is a well-described technique to reduce the risk of recurrence. Previous retrospective reviews cite a high rate of wound complications and a symptomatic bony prominence over the lateral border of the foot after extensor digitorum brevis interposition. This manuscript modifies the previously described technique for extensor digitorum brevis interposition to only transpose the dorsal/medial half of the muscle. This allows for anatomic repair of the fascia and a more normal anatomy of the lateral border of the foot. Level of Evidence: Diagnostic Level V—expert opinion. See Instructions for Authors for a complete description of levels of evidence.