A 71-year-old man presented with a 4-year history of a progressively enlarging, painless mass in the left buccal mucosa. He had no specific medical problems except hypertension, which was under regular medical control. Physical examination showed a 4.0 × 2.5-cm, well-defined, hard, movable submucosal mass in the buccal space on the left side. The overlying buccal mucosa had a normal appearance, without ulceration or erythema. Initially, the patient's condition was suggestive of pleomorphic adenoma of the minor salivary gland. The results of laboratory studies, including hematologic and biochemical values, were all within normal range. No history of trauma was noted.
Hsu H, Lee L, Chang K. Pathology Quiz Case 2. Arch Otolaryngol Head Neck Surg. 2012;138(1):97. doi:10.1001/archoto.2011.219-a