American Journal of Neuroradiology, Vol 19, Issue 10 1849-1851, Copyright © 1998 by American Society of Neuroradiology
ARTICLES |
Extranodal non-Hodgkin lymphoma involving the muscles of mastication
J Chong, PM Som, AR Silvers and JF Dalton
Department of Radiology, Mount Sinai School of Medicine, City University of New York, NY, USA.
Involvement of the skeletal muscle by non-Hodgkin lymphoma (NHL) is unusual. The most commonly affected muscles are those of the extremities, pelvis, and gluteal regions; rarely are the muscles in the head and neck involved. We report the clinical, CT, and MR imaging findings in two patients with extranodal NHL in the head and neck region involving the muscles of mastication. One patient was immunocompetent and had lymphoma that arose within the muscles; the other was a patient with AIDS who had disseminated disease at diagnosis. In both patients, the involved muscles were isodense with normal muscles on CT scans. On MR images, the infiltrated muscles were isointense with normal muscles on the T1-weighted sequence and hyperintense on the fast spin-echo T2-weighted sequence, with variable enhancement after administration of intravenous contrast material.