Which of the following malignant salivary gland tumours has a tendency for perineural invasion?: (A) Mucoepidermoid carcinoma, (B) Adenoid cystic carcinoma, (C) Adenocarcinoma, (D) Acinous cell carcinoma
Answer is B. Adenoid cystic carcinoma has a propensity to spread by perineural invasion. Depending on site most common nerves involved are maxillary and mandibular division of trigeminal.