Unusual Presentation of Oral DLBCL Resembling a Canine Fossa Abscess.

This report aims to describe a unique case of diffuse large B-cell lymphoma originating from the oral cavity, which presented with symptoms mimicking a canine fossa abscess. It emphasizes the importance of accurate differential diagnosis and appropriate treatment. A 64-year-old female patient visited the authors' clinic with a painful swelling in the left anterior region of the maxilla, persisting for 1 month.