Bilaterally symmetrical tibiofibular synostosis A rare incidental finding

Abstract

Introduction: Tibiofibular synostosis is an uncommon presentation and may involve the proximal, middle or distal tibiofibular joint. As it has a wide spectrum of clinical presentations the author aims to make the clinician aware of this possible differential diagnosis. Materials and methods: The bone specimen described was obtained from the osteology museum of SGT Medical College. The measurements were taken with sliding vernier caliper and flexible steel tape. observations A bilaterally symmetrical tibiofibular synostosis was observed at the junction of middle and distal one-third with slight bowing of fibula in the midshaft region. discussion Although the middle tibiofibular synostosis is usually acquired the bilateral symmetry of synostosis with no evidence of callus formation or trauma in the present case favours congenital etiology. The normal length and shape of fibula along with an absence of any growth abnormalities favours the hypothesis that the synostosis developed in adult life i.e. after the closure of the growth plates. Thus the author alerts the clinician to always rule out synostosis in every case of abnormality in leg whether during primary examination or follow-ups after operation. As a rule bilateral evaluation and comparison is necessary because the treatment modality depends not only on clinical picture but also on its etiology and pathology.