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AJR 2004; 183:995-999
© American Roentgen Ray Society

Musculoskeletal Imaging

Imaging Findings in Three Cases of the Nodular Type of Muscular Sarcoidosis

C. Tohme-Noun1, C. Le Breton1, A. Sobotka1, Z. E. Boumenir1, B. Milleron2, M. F. Carette1 and Antoine Khalil1

1 Department of Radiology, Hôpital Tenon, 4 Rue de la Chine, Paris 75970, Cedex 20, France.
2 Department of Pneumology, Hôpital Tenon, Paris 75970, Cedex 20, France.

OBJECTIVE. Sarcoidosis is a granulomatous multisystem disorder that may uncommonly involve muscle. We report the sonographic and MRI findings in three cases of the nodular type of muscular sarcoidosis.

CONCLUSION. Intramuscular hypoechoic well-defined nodules in young patients or patients with a history of sarcoidosis suggest the diagnosis of intramuscular sarcoid. MRI is useful in detecting muscle sarcoid, evaluating the extent and distribution of muscle involvement, and monitoring the patient during follow-up after steroid therapy. MRI showed nodules that were iso- or hyperintense relative to muscle on T1-weighted sequences. On T2-weighted images and STIR sequences, we observed numerous intramuscular nodules of homogeneous high signal intensity. All nodules enhanced homogeneously on contrast-enhanced T1-weighted sequences. Disappearance of all nodules was seen on follow-up sonograms and MR images after patients had received steroid therapy.


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