A 19-year-old woman presented with a 2½-year history of a slowly enlarging mass on the left ventrolateral aspect of her tongue. The lesion had previously been asymptomatic, but the patient now complained of mild dysarthria. She denied any pain, bleeding, loss of sensation, hoarseness, difficulty breathing, fatigue, or weight loss. She also denied smoking or using alcohol and had no significant medical history. Physical examination revealed a soft, nontender, submucosal mass extending inferiorly along the left ventrolateral aspect of the oral tongue to the lateral floor of the mouth. The tongue had good range of motion, but protrusion to the left was limited by mass effect. No taste disturbances, loss of sensation, ulcerations, atrophy, or mucosal discolorations were noted, and cranial nerve function was intact. There was no associated neck lymphadenopathy.