Complete Cubonavicular Coalition Associated with Midfoot Osteoarthritis

Abstract

Introduction. Cubonavicular coalitions represent a relatively rare condition with less than forty cases described in the literature, the majority of which are fibrocartilaginous. To our knowledge, cubonavicular osseous coalition associated with osteoarthritis of the midfoot has never been described. Case Presentation. We present the case of a 26-year-old man with bilateral Achilles tendinosis, in whom radiological studies show an incidental finding of a complete osseous cubonavicular coalition, as well as a partial osseous cubo-third cuneiform coalition and a fibrous band between the first and second cuneiforms of the right foot, associated with arthritic changes of the tarsometatarsal joint. A nonosseous calcaneocubonavicular coalition was found on the left foot. These multiples coalitions were asymptomatic in this case. Discussion. Cubonavicular coalition, even asymptomatic, can cause midfoot osteoarthritis in young patients. We may therefore suspect that the immobility of the cubonavicular joint causes additional stress on the midfoot.

Bilateral Cubonavicular and Synchronous Talocalcaneal Tarsal Coalition with Stress Response—Case Report and Review of Literature

“… 11 Cubonavicular and synchronous (multiple) tarsal coalitions, presented in this case, are less commonly reported with only 43 cases in 34 patients reported in the current literature. 12 13 14 The age at diagnosis ranges from 9 to 47 years old. 15 16 The majority of patients are symptomatic but these data are limited by low case numbers and a probable underreporting in asymptomatic patients.…”

“…Nine cases have been reported to occur bilaterally, with only two of these being nonosseous coalition, as demonstrated in our case. 12 14 17 18 19 20 21 22 23 …”

“…Close clinical and radiological follow-up is required to avoid secondary stress injuries, fractures, and arthritis. 12 …”

“…Nine cases have been reported to occur bilaterally, with only two of these being nonosseous coalition, as demonstrated in our case. 12,14,[17][18][19][20][21][22][23] Multiple coalitions within the same foot are rare. They may not only occur in syndromes such as Apert syndrome, fibular hemimelia, and tarsal-carpal coalition syndrome but also occur outside of syndromic associations.…”

“…Close clinical and radiological follow-up is required to avoid secondary stress injuries, fractures, and arthritis. 12 Although it is well known that coalitions frequently involve both feet, multiple synchronous and bilateral tarsal coalition are a rare and less well-recognized entity. It may be a source of chronic and sometimes relentless foot pain in adolescent patients.…”