<prompt> Which tumour have the tendency to invade perineural spacesAdenoid cystic carcinomaMucoepidermoid CarcinomaAcinic cell carcinomaAdenocarcinoma  <response>: Adenoid cystic carcinoma is a relatively uncommon tumour, which in approximately 50 of cases is found in the minor salivary glands in paicular the palatine glands. Similar neoplasms have been repoed in the nose, sinuses, upper airways, breast, and elsewhere.Although slow growing, adenoid cystic carcinomas are unpredictable tumours with a tendency to invade perineural spacesRobbins pathology 9e pg: 747 