CT and Pathologic Study of the Appendix Abscess

Objective To evaluate the role of CT diagnosis for the appendix abscess. Methods CT manifestations of 20 cases with the appendix abscess were retrospectively analyzed. The diagnosis were proved by operation and pathology. Results The findings of CT with the appendix abscess appeared localized and irregular masses with miscellany density in the right lower quadrant of the abdomen in 13 cases. The abscess had a clouding border and the bowels around it were adhered in 12 cases, the border was clear and deformity of ascending colon in 1 cases. There were masses with miscellany density in the right lower quadrant of the abdomen with the bowel wall of cecum and ascending colon thickened in 3 cases. There were the patch or network nidus in fat around the cecum in 4 cases, pelvic effusion in 1cases. The abscess were obviously enhanced on contrast enhanced CT scan. There were irregular and annular enhanced in 16 cases, patchy and pieces enhanced in 4 cases. Conclusions CT found localized and irregular masses with miscellany density in the right lower quadrant of the abdomen were clued to the appendix abscess. In the majority cases, the diagnosis could obtained depending on CT findings and clinical history. Definite diagnosis depends on operation and pathology.