Introduction: An osteology specimen of post traumatic proximal tibiofibular synostosis is discussed along with photographs of the specimen and its Xray and computed tomography scan. Case Report: An osteology specimen of tibia and fibula united in their proximal shafts was studied. The bony bridge between the leg bones was associated with a callus in the tibia. Computed tomography scan showed full grown cortex and marrow cavity inside the synostosis. The inferior tibiofibular joint was disrupted. Conclusion: An osteology specimen of post traumatic proximal tibiofibular synostosis is discussed. Similar occurance in life can lead to peroneal neuropathy and persistent ankle pain.