A 66-year-old man was referred to our department because of multiple ulcers in the alveolar ridges of both jaws. The ulcers exposed the alveolar bone (Fig. 1, Fig.2, Fig. 3).

The patient neither smoke nor drank alcohol, but had a history of multiple myeloma subjected to chemotherapy.
Panoramic X-ray (Fig. 4), CT and biopsy studies were requested.