Severe Pain and Edema of the Neck and Chest

CT examination of a patient with Severe Pain and Edema of the Neck and Chest

The patient presented to emergency with severe pain and oedema of the neck and chest. His family reported that he was being treated for mental disorders for the past 5 years. During objective examination the surgeon found crepitations and pain in palpation. The patient did not report difficulty in breathing.

What do you see on the CT?