Muscular sarcoidosis - Ga-67 scintigraphy and magnetic resonance imaging

Ga-57 scintigraphy is helpful in the assessment of active extrapulmonary sa rcoidosis. Muscular involvement of sarcoidosis is often asymptomatic or non specific, and laboratory examinations do not provide convincing evidence of muscular involvement. The authors report a case of muscular sarcoidosis de tected by Ga-67 scintigraphy. In a patient who had fever and arthralgia of both knee joints, Ga-67 scintigraphy showed mediastinal and hilar involveme nt of sarcoidosis with unexpected extensive muscular uptake. Magnetic reson ance imaging revealed in detail intramuscular infiltration of sarcoid granu loma. Ga-67 scintigraphy is useful in detecting inflammatory muscular invol vement of sarcoidosis and other multiorgan involvement.