Figure 1. Pockets of gas (red arrow) are seen at the expected location of the left thyroid gland extending across the midline with extension into the soft tissues of the neck, producing a mass effect on the trachea. Air fluid levels are seen posterior to the expected site of the trachea (dashed blue arrow)

From

An Unusual Case of Neck Swelling

Vinay Acharya, Jose A Perez Jr

American Journal of Infectious Diseases and Microbiology. 2017, 5(3), 106-108 doi:10.12691/ajidm-5-3-2