Kransdorf M J, Moser R P, Jelinek J S, Weiss S W, Buetow P C, Berrey B H
Department of Radiology, Walter Reed Army Medical Center, Washington, DC 20307-5001.
J Comput Assist Tomogr. 1989 Sep-Oct;13(5):836-9. doi: 10.1097/00004728-198909000-00016.
Intramuscular myxoma is a benign mesenchymal lesion consisting of bland spindled cells embedded in an avascular myxoid stroma. On CT, intramuscular myxoma presents as a well-demarcated, homogeneous, low density mass situated within skeletal muscle. The attenuation of the lesion is slightly greater than water but less than that of the surrounding normal muscle, with typical values between +10 and +60 HU. There is scant magnetic resonance (MR) literature on the appearance of intramuscular myxoma; the few MR spin echo images that have been published characterize it as a homogeneous mass with signal intensity less than or equal to skeletal muscle on T1-weighted and brighter than fat on T2-weighted pulse sequences. We present two cases of intramuscular myxoma with imaging characteristics that differ from those previously reported.
肌内黏液瘤是一种良性间叶性病变，由嵌入无血管黏液样基质中的温和梭形细胞组成。在CT上，肌内黏液瘤表现为位于骨骼肌内边界清晰、均匀的低密度肿块。病变的衰减略高于水，但低于周围正常肌肉，典型值在+10至+60HU之间。关于肌内黏液瘤的磁共振（MR）表现的文献很少；已发表的少数MR自旋回波图像将其特征为在T1加权像上信号强度小于或等于骨骼肌且在T2加权脉冲序列上比脂肪亮的均匀肿块。我们报告两例肌内黏液瘤，其影像学特征与先前报道的不同。
