Fig. 1 a

Abdominal CT at initial examination: CT reveals an enlarged appendix in the right lower abdomen. b Abdominal CT on postoperative day 3: there is no fluid accumulation suspicious of leakage at the edge of the dissection. c Chest CT on postoperative day 3: CT reveals bilateral pleural effusion and extensive mottled frosted glass shadows in the bilateral lung fields. d Histopathological analysis: the pathological diagnosis of the resected appendix is gangrenous appendicitis. CT Computed tomography