From the case:
Dental abscess extending into the submandibular space






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Periapical lucency extending through the mandible inferiorly into the soft tissues of the submandibular space. On post-contrast images there is a peripherally-enhancing fluid collection in keeping with an abscess.
Case Discussion
Submandibular space abscess as a result of a dental abscess with a sinus tract through the mandible.
The classic imaging differential is that of a necrotic floor of mouth squamous cell carcinoma.