Cryopreserved Amniotic Membrane and Autogenous Adipose Tissue as an Interpositional Spacer After Resection of a Cubonavicular Coalition: A Case Report and Review of the Literature.

Coalitions of the hindfoot are a relatively rare but challenging condition encountered by foot and ankle surgeons. Those that manifest between the cuboid and navicular (cubonavicular coalitions) are seen even more infrequently and are estimated to comprise ∼1% of all tarsal coalitions. Treatment for cubonavicular coalitions parallels protocols for more common hindfoot coalitions. Typically, resection versus hindfoot arthrodesis procedures are used. The present study describes the case of a 34-year-old male with a painful cubonavicular coalition and early secondary signs of arthrosis. Despite the recommended guidelines of hindfoot arthrodesis, he elected for surgical resection. Autogenous adipose tissue and cryopreserved amniotic membrane were used for interposition at the resection site. This case demonstrates that surgical resection with interpositional grafting can be successful even in advanced disease states.