Maxillary sinus lymphoma: a consideration in the diagnosis of odontogenic pain

A patient with a known history of diffuse large cell histiocytic non-Hodgkin's lymphoma in the neck and left parotid gland presented with acute right maxillary odontogenic pain and swelling. Following endodontic treatment of the nonvital maxillary right second molar, minor masticatory discomfort persisted in the sextant but a dental etiology could not be established. Two months after the onset of symptoms, the right maxilla expanded uncontrollably and biopsy confirmed an antral lymphoma. The patient succumbed to the lymphoma and secondary complications 2 months later.