Hydatid disease: A rare cause of fracture nonunion.

Hydatid disease is an infrequent parasitic infestation caused by cestode, most commonly, . Bone involvement is distinctly uncommon. We would like to share our experience of a rare case of hydatid disease of femur in a 24-year-old male who presented with nonunion of subtrochanteric fracture. Histopathology showed typical lamellated wall and dagger-shaped hooklets. In view of its rarity, hydatid disease often remains an unsuspected infection of the bone.