Academy of Medical Sciences of I.R. Iran Archives of Iranian Medicine 1029-2977 25 3 2022 03 01 Adenoid Cystic Carcinoma with Intracranial Extension 191 193 10.34172/aim.2022.32 EN Masoud Asghari https://orcid.org/0000-0001-7709-2861 Mahdieh Rajabi-Moghaddam Hamid Abbaszadeh https://orcid.org/0000-0002-7443-0607 Journal Article 10.34172/aim.2022.32 2021 03 04 2021 04 21 Adenoid cystic carcinoma (ADCC) is a malignant tumor of salivary gland origin. ADCC of sinonasal tract is rare. We present a rare and unresectable case of sinonasal ADCC with intracranial extension in an 83-year-old man with the chief complaint of nasal congestion. Invasion to the maxillary sinus, nasopharynx, anterior cranial fossa, sella turcica and extension to cavernous sinus, dura mater and infratemporal fossa were evident on MRI and CT scan. The patient was treated only by palliative radiotherapy, but unfortunately, he died 3 months after the initial diagnosis.