A 45-year-old man presents with a painless mass in the neck. A 4-cm firm, movable tumor is identified at the angle of the left jaw. A biopsy of the tumor reveals myoepithelial cells intermingled with myxoid, mucoid, and cailaginous areas. The tumor is removed surgically. Which of the following is the most likely prognosis?
Contralateral spread Invasion of bone Local recurrence Malignant transformation