骶前尾肠囊肿的MRI表现:4例报告并相关文献复习  

MRI Features of Presacral Tailgut Cysts:4 Case Reports and Review of the Literature

作　　者：唐晓雯 王中秋[2] 王绍娟[2] 刘永康[2] 司海鹏[3] 

机构地区：[1]江苏省肿瘤医院放射科,南京210009 [2]江苏省中医院放射科 [3]江苏省中医院病理科

出　　处：《临床放射学杂志》2018年第1期162-165,共4页Journal of Clinical Radiology

摘　　要：目的分析骶前-直肠后间隙囊性错构瘤（尾肠囊肿）的MRI表现特点,进行相关文献回顾,提高对这一罕见病的临床及影像学诊断等方面的认识。方法回顾性分析经手术病理证实的4例直肠后囊性错构瘤（尾肠囊肿）的临床及病理组织学资料,4例均为女性,年龄32~50岁,平均41岁。总结和分析其MRI表现,包括病变的位置、形态、大小,常规序列、DWI序列信号特征及周围组织器官侵袭状况等。结果 4例MRI检查均显示为多房囊性信号,1例信号较均匀,另外3例信号混杂不均,包括1例边界模糊、T1信号增高、囊壁不均匀增厚并向周边组织浸润,后经病理证实病灶内含浸润或转移性腺癌成分。结论骶前尾肠囊肿在临床上发生率较低,相关文献及病例报道有限,复杂性尾肠囊肿即伴发感染或恶性变者更罕见。术前MRI检查能显示病灶位置、形态、大小、信号特点及向周边组织的浸润程度,有助于将TGC与直肠后间隙其他病变相鉴别并预测肿块良恶性,以指导临床选择正确的治疗方式。Objective To analyze the Magnetic resonance imaging （MRI） features associated with prescral-retrorectal cystic hamartoma （tailgut Cyst,TGC） , and review the relevant literature, to improve understanding of the clinical and imaging diagnosis of this uncommon disease. Methods MRI features of 4 histopathologically examined retrorectal tailgut cysts were retrospectively analyzed with reference to clinical datas. 4 cases were all females ,aged 28 to 50 ,with an average age of 45. Results The 4 cases were all demonstrated as multicystic masses on MRI imaging,with one case displayed as homogeneous signal intensity, which was hypointense on T1 and hyperintense on T2-weighted images. While the other 3 ones were all complex cystic leisions with heterogeneous signal intensity, including one had fuzzy boundaries,intermidiate to high signal on Tl-weighted images, irregular thickening of the lesion wall, and invasion to the surrounding tissue and organs, which was lately histologically examined with a component of invasive or metastatic adenocarcinoma. Conclusion Tailgut cysts are rare entities in the retrorectal space, with limited referring literatures and reports, and the complicated TGC （TGC accompanying with infection and malignancy are even rare. Preoperative MRI is of great diagnostic values to define the location, shape, size ,signal intensity ,and involvement of adjacent structures,in order to differentiate TGC from other leisions in retrorectal space and identify malignancy from benignity to guide appropriate clinical management.

关 键 词：骶前-直肠后间隙尾肠囊肿 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学] R739.93[医药卫生—诊断学]