Post-Traumatic Turret Exostosis of the Proximal Phalanx of the Middle Finger: A Rare Case Report and Review of Literature.

INTRODUCTION

Turret exostosis is an uncommon benign osteocartilaginous lesion that originates from the cortical surface of bone, most commonly affecting the phalanges of the hand. It is considered a reactive subperiosteal bone proliferation that typically develops following minor trauma. Because its clinical and radiological appearance may resemble other surface bone lesions such as osteochondroma and bizarre parosteal osteochondromatous proliferation (Nora's lesion), accurate diagnosis is important. Involvement of the proximal phalanx is particularly uncommon.

CASE REPORT: A 32-year-old male reported with a progressively growing swelling on the dorsal surface of his right middle finger for 1 year following trauma, which was accompanied by pain and discomfort for 8 months. Radiographs demonstrated a surface-based ossified lesion arising from the proximal phalanx without continuity with the medullary canal. Magnetic resonance imaging revealed an osteocartilaginous lesion without intramedullary extension. The lesion was treated with complete surgical excision. Histopathological examination confirmed the diagnosis of turret exostosis. The patient showed no signs of recurrence at 1-year follow-up and continued to be asymptomatic with a full range of motion.

CONCLUSION

Turret exostosis of the proximal phalanx is an uncommon lesion that can mimic other periosteal tumors. Careful clinicoradiological evaluation with histopathological confirmation is essential for accurate diagnosis. Complete surgical excision results in excellent functional recovery with minimal recurrence.