Cystic adenoid carcinoma of sphenoidal sinus

Adenoid cystic carcinoma (ACC) is a malignant epithelial tumor of the salivary glands, which usually gives metastases late, but his persistent and aggressive because of its ability to infiltrate surrounding tissue and nerve fibers. ACC of paranasals sinus may spread following the path of the cranial nerves. The close relationship with vital structures prevents complete tumor resection leaving positive margins up to 80 % of patients, mainly at the base of the skull with a high rate of local recurrences and late metastases, aggressive due to its ability to infiltrate surrounding tissue and nerve fibers.