Sinonasal adenoid cycstic carcinoma is an uncommon tumour accounting for 10% of malignant tumours in the sinonasal zone. It is usually located in the maxillary sinus and is characterized by slow growth and capacity for perineural spread, which results in a high risk of recurrence and metastasis in other parts of the body. Today the most widely applied treatment for this carcinoma is surgical removal followed by...