弹力纤维瘤的CT及MR诊断

CT and MR diagnosis of elastofibroma dorsi

目的:探讨多层螺旋CT及MR检查在背部弹力纤维瘤诊断中的价值。材料与方法:回顾性分析8例经手术病理证实的弹力纤维瘤患者,所有患者均行CT检查,其中2例行增强CT检查,1例行MR平扫检查。分析弹力纤维瘤的临床特点及影像学(CT及MR)表现。结果:8例患者均为女性,5例病灶累及双侧,2例位于右侧,1例位于左侧。13个病灶均位于背部肩胛下角区肌肉深面。CT共发现13个病灶呈扁丘状或半圆形肿块,主要呈肌肉密度,内见条状脂肪密度沿病灶长轴间隔排列,边缘不规整,与肋骨及邻近肌肉分界不清,增强扫描4个病灶均未见确切强化;1个肿块MR信号不均,呈以等信号为主的肌纤维组织与高信号脂肪组织交替排列。结论:弹力纤维瘤有其特征性的影像学表现,多数患者CT及MR检查即能做出明确诊断。

Objective: To assess the value of MSCT and MR in the diagnosis of elastofibroma dorsi(EFD). Materials and Methods: Eight patients with elastofibroma dorsi confirmed by surgery and pathology enrolled into this study. All patients underwent plain chest CT, while 2 underwent contrast enhanced CT and 1 underwent plain chest MR. Clinical features and imaging(CT and MR) characteristics of EFD were analyzed. Results: Eight patients were all female. Five patients had ten lesions bilaterally, on right side 2 patients, on left side 1 patient. All lesions located in the deep subscapular muscle at the scapular angle area in the back. Totally 13 lesions were found on CT. Masses were flat mound-like or semi-circular in shape, mainly were muscular-like density, and fat densities were seen along the long axis of masses, presenting as stripes in all lesions. The masses had irregular edges, and with no clear boundary between adjacent ribs and skeletal muscle. All 4 lesions did not enhance. 1 mass had inhomogeneous signal intensity on MR with intermingled muscle and fat intensities. Conclusion: EFD has its characteristic imaging findings, a definite diagnosis can be made in most patients with CT and MR images.