[Cervical skin emphysema: a rare complication following tonsillectomy].

Emphysema of the subcutis or interstitial compartments of the neck or around the naso- oro- or hypopharynx is caused by a perforation. In most cases, it occurs after surgery in this area; spontaneous emphysema is very rare. The characteristic symptom is crepitation; the extension is best seen on a CT scan. Endoscopic control of the surgical area for other lesions is necessary. An anaerobic, gas producing infection must be ruled out. Antibiotics should be given prophylactically.