疝是最常见的腹壁病变,疝出肠管的表现因其气液含量和梗阻程度的不同而存在差异。腹壁内局限性积液（术后血清肿、血肿液化和脓肿）能清晰显像，不很常见的腹壁肿瘤（脂肪瘤、韧带样纤维瘤、MLC、淋巴瘤）或血管病变也能予以鉴别。
Figure1.A,Anteriorabdominalwallonatransversescan.RAindicatesrectusabdominis;EO,externaloblique;IO,internaloblique;andTA,transverseabdominis.Thearrowpointstotheaponeurosisoflateralmuscles.B,Layersoftherectussheathonatransversescanoftheabdominalwall.Arrowspointtotheanteriorrectussheath,peritoneum,andfasciatransversalis.
图1A，前腹壁横断扫描。RA，腹直肌；EO，腹外斜肌；IO，腹内斜肌；TA，腹部横切。箭头指向侧肌腱膜。B，腹壁横断扫描显示腹直肌鞘层。箭头指向腹直肌鞘前层、腹膜和腹横筋膜。
积液
Localizedfluidcollectionsintheabdominalwallareseromas,abscesses,orliquefyinghematomas.Noninfectedseromasaftersurgeryareusuallyanechoiccollections.Fluidcollections
