Double Checkrein Deformity of the Hallux Involving Both Flexor and Extensor Tendons: A Case Report

We present a rare case of a 26-year-old woman with double checkrein deformity involving both the extensor and flexor tendons, secondary to compartment syndrome. The patient experienced hallux and lesser toe deformities, limiting mobility and causing painful callosities. Surgical correction involved the flexor hallucis longus tenotomy and the extensor hallucis longus and extensor digitorum longus tendon lengthening, leading to significant functional improvement and resolution of symptoms at 2-year follow-up.

This case emphasizes the importance of recognizing double checkrein deformity, a rare condition involving both flexor and extensor tendons, to ensure appropriate diagnosis and optimal treatment outcomes.