Fig. 1

CT images of the patient at day 0, day 5 and day 11 of hospitalization.A–D The CT images of the patient at the time of admission, the mandibular space and mediastinum of the patient has obvious gas shadow, there is pleural effusion, and the lung image is normal; E–H The CT images of the patient 5 days after admission and treatment, the mandibular space and mediastinal gas after drainage treatment reduced, but the infection of the neck and mediastinum did not change significantly, the amount of pleural effusion increased compared with previous, and the lungs appeared as strips of increased density which indicating lung infection; I–L The CT images of the patient 11 days after admission, the submandibular space and mediastinal gas decreased, neck and mediastinal infections improved, lung infections improved, and pleural effusion decreased