<prompt> Which of the the following is true about adenoid cystic carcinoma :Most common malignant tumor in minor salivary glandsMost common site is sinonasal tractMost commonly involved nerve is trigeminalMost common site of metastasis is liver  <response>: Adenoid cystic carcinoma: Most common malignant tumor in submandibular, sublingual and minor salivary glands Most common site is hard palate sinonasal tract Most common site of metastasis is lungs AKA - Tracherous tumor - tumor is malignant but appear benign Most common type is- Cribriform variety - has swiss cheese pattern Has neurotrophic propey -Most commonly involved nerve is Facial nerve trigeminal Tumor invades Haversian system of long bones Treatment: Excision with widest cuff of normal tissue Post operative - Prevent recurrence 