探讨巨大网膜囊肿的误诊原因和诊断要点。

本研究采用回顾性分析法分析本院近4年(2003年至2006年)诊治的3例巨大网膜囊肿误诊病例。

本研究3例患儿最后均确诊为淋巴管瘤型网膜囊肿，由于瘤体巨大，几乎占据整个腹腔，其表现无论是体格检查，还是超声及CT检查结果，均与腹水症状相似，极易发生误诊。3例患儿中，误诊时间最长者达4年之久。

以腹水为主要临床表现的疾病，并不一定都是腹水症。若患儿无明确导致腹水的病因，特别在内科按常规腹水治疗无效时，应结合相关检查结果进行综合分析，并考虑巨大网膜囊肿的可能。

To discuss the cause of misdiagnosis of huge omental cyst and key diagnosis points.

3 cases of omental cyst which were misdiagnosed in the past 4 years were studied retrospectively (from 2003 to 2006).

All of the 3 children had huge omental cysts which were the lymphangioma. Due to the size and tendency to occupy every available space in the abdomen, clinical manifestations, not only in the features of medical examination but also in the results of ultrasound and CT, were similar with ascites, which easily leaded to a misdiagnosis. The longest time of misdiagnosis was up to 4 years among those 3 children.

Children with grossly distended, fluid filled abdomen need not have ascites. If the cause of ascites is not available, especially when the medical therapy is inefficient, aggregate analysis should be available, associated with all aspects of examination results, and the possibility of huge omental cyst should be taken into account.