Imaging features of subcutaneous sarcoidosis.

<bold>Objective: </bold>This report describes subcutaneous sarcoidosis, focusing on the radiological and magnetic resonance (MR) features of the disease.<bold>Design and Patients: </bold>The cases of four patients (one male and three female, age range 36-75 years) who had subcutaneous sarcoidosis with no other organs affected were reviewed. Lesions were nodular in two cases, and in the other two were diffuse.<bold>Results: </bold>Computed tomography (CT) demonstrated a well-defined, homogeneous, and enhanced lesion in the nodular cases. However, in the diffuse cases, CT showed a heterogeneous, honeycomb-like appearance and little enhancement. Angiography showed a fine stain in the arterial phase. MR imaging of the nodular lesions was homogeneous with a signal intensity similar to muscle on T1-weighted images but heterogeneous with a higher signal than muscle on T2-weighted images. Diffuse lesions showed a striped or mesh pattern with intermediate signal intensity on both T1- and T2-weighted images. Contrast-enhanced MR images showed slight enhancement.<bold>Conclusions: </bold>Subcutaneous sarcoidosis should be considered in the differential diagnosis when a patient presents with the radiological and MR features described. [ABSTRACT FROM AUTHOR]