Steroid injection into a simple bone cyst

This 11-years old girl had left hip pain. The plain radiograph showed a mildly expansile osteolytic lesion with a narrow zone of transition in the distal neck (Fig. 1). A simple bone cyst was suspected and the CT (Fig. 2) and MRI (Figs. 3-5) confirmed this possibility.

In view of the age and location, the treating doctor decided to treat the patient conservatively and sent her for a CT-guided steroid injection. This was performed with CT fluroscopy control and after introducing a needle into the lesion (Fig. 6), a mixture of methylprednisolone and intravenous contrast was injected (Figs. 7, 8). Queried after a week, the patient confirmed relief from pain.