Complete bony coalition of the talus and navicular: decades of discomfort.

Tarsal coalition is a congenital disturbance of hindfoot development. Talonavicular coalition is among the rarest forms of aberrant bony union of the tarsus. It frequently occurs bilaterally and in association with a number of skeletal deformities. Some patients are asymptomatic and the anomaly is discovered incidentally on plain radiographs. For others, a troublesome bony prominence will be the principle complaint and in a small proportion of patients marked foot and ankle pain with activity will prove debilitating. The authors describe the case of a 54-year-old male with bilateral foot pain spanning for nearly two decades. Symptom onset was insidious and at the time of presentation, he was limited to 10-15 min of mobilisation on flat ground.