Sonographic Features of Nodular-type Muscular Sarcoidosis

Sarcoidosis is a granulomatous multisystem disorder that rarely involves muscle. Although characteristic ultrasound features of nodular-type muscular sarcoidosis have been reported, observations for such lesions at different disease stages are limited. We report ultrasonographic findings for nodular-type muscular sarcoidosis at 3 months and 1 year after the onset of disease in the left medial gastrocnemius muscle of a 35-year-old woman. A hypoechoic mass was initially detected in the involved muscle, and central echogenicity appeared later. It is, therefore, considered that ultrasonography can be a valuable tool in detecting and following up nodular-type muscular sarcoidosis lesions.