LAUSR

A 28‐year‐old male presented with dull aching left thigh pain worsening with activity and reduced by rest of 2‐year duration. There was no history of preceding trauma, joint pain, muscle weakness, or evidence of hormonal hypersecretion. His past history was unremarkable and on examination, there was no cutaneous lesion or deformities. There was mild tenderness in deep palpation of left upper thigh with no myopathy. His bone mineral profile including bone turnover markers was within normal limits. The plain radiograph [Figure 1] showed a well‐defined expansile lytic lesion with thick sclerotic margin (Rind sign) in the left femoral neck and in the inter trochanteric region, with narrow zone of transition, with ground glass matrix, no cortical break, no periosteal reaction, no soft tissue involvement which was indicative fibrous dysplasia. In the MRI [Figure 2], the lesion appeared hypointense on T1 and measured 5 × 2.5 × 2 cm. Technetium‐99m methylene diphosphonate (MDP) scan [Figure 3] showed an increased tracer activity in the left proximal femur. He was advised treatment with bisphosphonates as he had pain of moderate severity.