Becker muscular dystrophy associated with focal myositis on bone scintigraphy.

[focal myositis]

Bone scintigraphy was performed on a 6 -year -old boy with possible sacroiliitis .Extraosseous uptake in the region of the paraspinal , psoas and calf muscles was noted and suggested myositis . Subsequently , his creatine kinase level was found to be elevated . Results of a neuromuscular examination , muscle biopsy with dystrophin immunostaining , and a multiplex polymerase chain reaction led to the diagnosis of Becker muscular dystrophy .A patient with Becker muscular dystrophy had several distinct areas of myositis localized by bone scintigraphy . Pathologic features including focal myonecrosis and regeneration may contribute to this scintigraphic picture .