Anteroposterior chest radiographs at 7.15 a.m. (A) and 1.30 p.m. (B) on the second postoperative day. A right pleural effusion already existed in the morning (A) and increased in size until 12 p.m. (B). Computed tomography (CT) scans of the thorax (C) performed on the second postoperative day verified a significant increase in fluid volume in the upper mediastinum (upper grey arrow). Furthermore, a large pleural effusion was observed (white arrow in the middle) with atelectasis of the right middle lobe (right black arrow). The subcutaneous air pockets described in cases of necrotizing soft tissue infection (NSTI) in the literature were absent.