肠系膜囊肿是指发生于肠系膜，囊壁由纤维组织组成，内覆上皮细胞的囊肿，以浆液性和乳糜性囊肿多见。肠系膜囊肿较少见，为一种良性疾病，多见于成人。大部分肠系膜囊肿位于小肠系膜，较少部分位于结肠系膜和腹膜后。囊肿较小一般无症状和体征。囊肿增大到一定程度时，则出现一系列临床症状与体征。肠系膜囊肿的诊断主要依靠临床表现及辅助检查。小的肠系膜囊肿无须治疗，肠系膜囊肿增大后，易并发急腹症，一旦确诊，应早期手术。
目的探讨小儿大网膜囊肿和肠系膜囊肿引发急腹症的诊治特点。
Objective To evaluate the diagnosis and management of acute abdomen caused by omental and mesenteric cysts in children.
目的：探讨小儿肠重复畸形的超声图像特征及与肠系膜囊肿的鉴别。
Purpose: To evaluate the ultrasonic manifestation of intestinal duplication in children and its differentiation from mesenteric cyst.
观察肿块的大小、囊壁结构及囊内分隔，有助于鉴别肠重复畸形与肠系膜囊肿。
By observing the size, wall structure and inside of the lesion, intestinal duplication could be easily differentiated from intestinal cyst.
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