A case of retropharyngeal abscess arising from infection of the mucobuccal fold region

We report a case of retropharyngeal abscess arising from infection of the mucobuccal fold region. A 73-year-old woman with severe swelling of the face and dysphagia was referred to our hospital. On the basis of the clinical symptoms and CT findings, the patient was given a diagnosis of an abscess accompanied by gas production involving the masticator, parapharyngeal, and retropharyngeal space.She was treated successfully by incision of the abscess and the administration of antibiotics. Multiple incisions were performed in the buccal region, and drains were placed in the masticator space. Thereafter, symptoms improved considerably. All drains were removed on the 18th postoperative day, and she was discharged 30 days after the onset.Retropharyngeal abscess is a rare but serious condition of the phlegmon. Treatment consists of systemic antibiotic therapy combined with thorough surgical drainage.