Chong J, Som P M, Silvers A R, Dalton J F
Department of Radiology, Mount Sinai School of Medicine, City University of New York, NY, USA.
AJNR Am J Neuroradiol. 1998 Nov-Dec;19(10):1849-51.
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.
非霍奇金淋巴瘤（NHL）累及骨骼肌并不常见。最常受累的肌肉是四肢、骨盆和臀区的肌肉；头颈部肌肉很少受累。我们报告了2例头颈部结外NHL累及咀嚼肌的临床、CT和MR成像表现。1例免疫功能正常，淋巴瘤起源于肌肉内；另1例为艾滋病患者，诊断时已有播散性病变。在2例患者中，受累肌肉在CT扫描上与正常肌肉密度相同。在MR图像上，浸润的肌肉在T1加权序列上与正常肌肉信号强度相同，在快速自旋回波T2加权序列上呈高信号，静脉注射对比剂后强化程度不一。
