【摘要】 目的:探讨腺泡状软组织肉瘤的MRI表现。方法:9例手术病理证实的腺泡状软组织肉瘤,术前均进行MRI平扫,其中4例行增强扫描,2例行1H-MRS扫描。对肿瘤的发生部位、大小、肿瘤形态、肿瘤的强化和1H-MRS表现进行分析评价。结果:位于大腿4例,小腿2例,上臂2例,臀肌和髂腰肌1例,8例肿瘤位于深部肌群;肿瘤体积平均大小5.1 cm×7.8 cm;5例呈分叶状;3例肿瘤周围有软组织结节;7例肿瘤的信号均匀,呈中等T1长T2信号,2例有囊变坏死;4例增强扫描者,瘤实质明显强化;2例1H-MRS均表现为3.2 ppm出现明显的Cho峰。结论:腺泡状软组织肉瘤的MRI表现缺乏特异性,但在一定程度上能够反应肿瘤的恶性特点,对于术前肿瘤定性诊断和指导临床治疗具有一定价值。更多还原

【Abstract】 Objective:The purpose of our study is to investigate the magnetic resonance imaging features of alveolar soft-part sarcoma(ASPS).Methods:Nine patients with ASPS confirmed by surgery and pathology had MR scanning before surgery,4 patients had enhanced MRI,2 cases had 1H-MR spectroscopy(MRS).The location,size,morphology,enhanced pattern and 1H-MRS appearance of tumors were analyzed and evaluated.Results:The locations of the tumor included thigh(4 cases),leg(2 cases),upper arm(2 cases),gluteus muscles and iliopsoas(1 case).There were 8 tumors located at the deep muscles.The mean size of the tumors was 5.1cm×7.8cm.Five tumors were lobulated in shape,3 tumors had peri-tumoral soft tissue nodules.The signal intensity was homogeneous in 7 cases,with iso-intensity on T1WI and hyper-intensity on T2WI.Cystic degeneration and necrosis were assessed in 2 cases.The solid component of tumors showed marked enhancement on contrast enhanced MRI in 4 cases.MR spectroscopy showed discrete choline(Cho) peak at 3.2ppm.Conclusion:The MRI appearances of ASPS are nonspecific,but malignancy could be suggested in certain degree,which is helpful in the diagnosis before surgery and provides information for treatment guidance.更多还原