输卵管系膜囊肿的CT诊断

CT diagnosis of mesosalpinx cyst

目的:总结分析输卵管系膜囊肿CT表现特征,提高本病诊断水平。方法:回顾性分析22例(23个病灶)经手术与病理证实的输卵管系膜囊肿的临床和CT表现。22例均行CT平扫及增强扫描。结果:22例中位于子宫右侧阔韧带旁12例,位于子宫左侧阔韧带旁9例,位于双侧阔韧带旁1例。囊肿大小12mm×15mm～93mm×137mm,囊肿呈圆形、卵圆形22个,葫芦状1个。囊肿边界清楚18例,部分边界模糊4例(5个病灶);23个病灶均囊壁菲薄,未见壁结节,囊液清晰,5例囊肿内见细线状分隔。平扫囊液CT值3～17HU,增强扫描囊壁及囊内细线状分隔呈轻度强化。15例可见子宫阔韧带"抱球征"。镜下囊肿表面衬纤毛柱状上皮,壁内有少许平滑肌组织,12例合并子宫附件肿瘤。结论:输卵管系膜囊肿的CT表现较具特征性,CT表现对本病的诊断和鉴别诊断具有重要价值。

Objective：To summerize CT findings of mesosalpinx cyst so as to improve the diagnosis quality of this disease. Methods：Clinical data and CT findings in 22 patients （23 lesions） with mesosalpinx cyst confirmed by surgery and pathology were retrospectively analyzed. All the 22 patients accepted plain CT scan and enhanced CT scan. Results： Among the 22 patients,the lesions were adjacent to the right broad ligament of uterus in 12 cases,to the left broad ligament of uterus in 9 cases and 1 patient had two mesosalpinx cysts respectively near to each broad ligament of uterus. The cysts were 12mm×15mm～93mm×137mm in size and showed round or oval lesion in 22 cases,gourd-shaped lesion in 1 case. The lesion had clear boundary in 18 cases,had fuzzy part of boundary in 4 cases （including 5 lesions）. 23 lesions all showed thin smooth wall without nodule and had clear cyst fluid and 5 lesions appeared thread-like septations in the cysts. The plain scan CT values of cyst fluid ranged 3~lTHU and in enhanced CT scan the thread-like septations in the cyst wall and in the cysts were slightly enchanced in 5 lesions. The broad ligament of uterus showed embrace-ball sign in 15 cases. The surface of cysts were lined by ciliated columnar epithelium and a little smooth muscle tissue was also seen in the cyst wall microscopically. 12 patients also had uterine accessories tumors at the same time. Conclusion：The CT findings of mesosalpinx cyst have some relatively characteristic features and mastering these features is very important for diagnosing and differentiating this disease.