横纹肌肉瘤的CT、MRI及PET/CT影像学表现  

Imaging manifestations of CT,MRI,and PET/CT of rhabdomyosarcoma

作　　者：蒲迪 刘慧君[1] 陈月芹[1] 于昊 PU Di;LIU Huijun;CHEN Yueqin;YU Hao(Department of Medical Imaging,Affiliated Hospital of Jining Medical University,Jining 272000,China)

机构地区：[1]济宁医学院附属医院医学影像科,山东济宁272000

出　　处：《医学影像学杂志》2024年第7期18-21,共4页Journal of Medical Imaging

摘　　要：目的 探讨横纹肌肉瘤(RMS)的CT、MRI及^(18)F-FDG PET/CT影像学表现。方法 选取经病理证实的16例RMS患者资料,分析其CT、MRI及^(18)F-FDG PET/CT影像学表现。结果 16例RMS中,10例病灶位于头颈部,1例位于肺部,4例位于四肢,1例位于腹盆腔。按病理分型为胚胎型RMS 6例,腺泡型RMS 7例,多形性RMS 2例,硬化性RMS1例。7例接受CT检查,6例见等密度不规则软组织肿块影,1例见不均匀稍低密度肿块影;增强后病灶不均匀强化,动脉期病灶内见迂曲小血管影。10例行MRI检查,10例T_(1)WI呈低信号、T_(2)WI呈高信号,病灶中央见稍低信号;8例DWI提示扩散受限,呈不均匀高信号;8例增强MRI呈不均匀、明显强化,病灶内见条片状无强化区。5例接受^(18)F-FDG PET/CT检查,病灶呈^(18)F-FDG摄取增高。6例伴骨质破坏,1例伴肺部转移,2例伴骨髓浸润,1例侵犯右眼眶及右额部。结论 CT检查显示RMS对邻近骨质破坏,MRI检查显示RMS病变大致侵袭范围,^(18)F-FDG PET/CT检查显示病灶代谢活性及是否伴远处转移,有助于提示RMS诊断。Objective To investigate the imaging manifestations of CT,MRI and ^(18)F-FDG PET/CT of rhabdomyosarcoma(RMS).Methods Totally,16 patients with RMS were collected,and their CT,MRI and ^(18)F-FDG PET/CT manifestations were retrospectively analyzed.Results One lesion was located in the lung,10 in the head and neck,4 in the extremities,while,one in the abdominpelvic cavity.Six cases were embryonic RMS,seven were acinar RMS,two were pleomorphic RMS,and one was sclerotic RMS.Seven cases underwent CT examination,six cases showed isodense irregular soft tissue masses,and one case showed uneven slightly low density mass.After enhancement,the lesion was heterogeneously enhanced,and tortuous small vessel shadow was seen in the arterial phase lesion.Ten cases underwent MRI,of which all 10 cases showed low signal in T_(1)WI.All 10 cases showed high signal in T_(2)WI,with slightly low signal visible in the center of the lesion.8 cases showed diffu‐sion restriction and inhomogeneous high signal in DWI and 8 cases showed inhomogeneous and obvious enhancement in en‐hanced MRI,with strips of non-enhancing areas visible in the lesion.Five cases underwent ^(18)F-FDG PET/CT and all lesions showed increased ^(18)F-FDG uptake.Six cases showed bone destruction,one case showed pulmonary metastasis,two cases showed bone marrow infiltration,and one case invaded the right orbit and right frontal area.Conclusions CT can observe the destruc‐tion of adjacent bone by RMS,MRI can clearly show the general invasive range of RMS lesions,^(18)F-FDG PET/CT can visualize the metabolic activity of lesions and whether they are accompanied by distant metastases,thus suggesting the diagnosis of RMS.

关 键 词：横纹肌肉瘤 体层摄影术 X线计算机 磁共振成像 正电子发射断层显像术 

分 类 号：R738.6[医药卫生—肿瘤] R445[医药卫生—临床医学]