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肠气囊肿症(PCI)罕见,是指分布于消化道浆膜下和(或)黏膜下的多发性充满气体的囊肿,分原发性和继发性. 确切病因和发病机制尚不明,常无症状或表现缺乏特异性,临床易造成漏诊和误诊. 结肠镜的普遍开展使结肠黏膜下PCI发病率有逐渐增加趋势. 气腹或膈下游离气体而无腹膜刺激征是其特征性表现之一. CT被认为是诊断 PCI最敏感和最有用的方法;结肠镜下表现类似多发性息肉病或黏膜下肿瘤. 无症状者,无需特殊治疗. 治疗主要有氧疗、内镜下治疗和外科手术及治疗原发病.“,”Pneumatosis cystoides intestinalis ( PCI) is a rare diseases characterized by the presence of multiple gas-filled cysts in the submucosa and/or subserosa in the wall of the gastrointestinal tract,and PCI can be divided into two subtypes:primary and secondary.The exact etiology of the disease and pathogenesis are still unknown.PCI are often missed diagnosis or misdiagnosed in clinic because it is usually asymptomatic or with no specific clinical manifestation.Incidence of PCI is increasing with the increasing application of colonoscopies.One of the pathognomonic features of PCI is pneumoperitoneum or free air underneath the dia-phragm without peritoneal irritation.CT is the most sensitive and useful method for the diagnosis of PCI.The colonoscopy findings of PCI may be similar to multiple polyposis or collections of submucosal tumors .No spe-cific treatment is recommended to asymptomatic patients.The management of PCI includes antibiotics,oxygen therapy,endoscopic therapy,surgery and the appropriate therapy related to the underlying cause of PCI.