We report a case of a woman in her 60s who presented with numb chin syndrome as the initial symptom; she had a history of breast cancer. Based on CT, MRI, and PET-CT imaging findings, we suspected mandibular osteomyelitis. She received medication for a long time but did not show improvement. We performed a pathological examination under general anesthesia. Herein, we report a case of breast cancer metastasizing to the mandible bone.
