A 48-year-old woman visited the oral and maxillofacial surgery department complaining of swelling under the left mandible. The patient said that the size of the small lump had not changed much since it was first discovered, but it seemed to have grown slightly recently after 5 years. She visited another hospital 1 week ago and had a CT scan, but no specific findings were found. A firm and mobile mass was palpated in the submandibular gland area during clinical examination. Ultrasound imaging and contrast-enhanced CT were performed, and the patient was diagnosed with pleomorphic adenoma. Submandibular gland resection was performed, and the mass was confirmed as pleomorphic adenoma by histopathological examination. There has been no recurrence to date, 8 years later. In this study, we will examine the diagnostic process of a rare submandibular gland pleomorphic adenoma and review the literature.

• 김옥준(전남대학교 치의학전문대학원 구강악안면병리학교실, 치의학연구소) | Ok-Joon Kim (Department of Oral and Maxillofacial Pathology, School of Dentistry, Dental Science Research Institute, Chonnam National University)
• 송인자(광주여자대학교 간호학과) | In-Ja Song (Department of Nursing, Kwangju Women's University)
• 이재서(전남대학교 치의학전문대학원 영상치의학, 치의학연구소) | Jae-Seo Lee (Department of Oral and Maxillofacial Radiology, School of Dentistry, Dental Science Research Institute, Chonnam National University)
• 윤숙자(전남대학교 치의학전문대학원 영상치의학, 치의학연구소) | Suk-Ja Yoon (Department of Oral and Maxillofacial Radiology, School of Dentistry, Dental Science Research Institute, Chonnam National University) Corresponding author