title: Intracranial perineural metastasis of adenoid cystic carcinoma of head and neck.
abstract: Three cases of intracranial perineural metastasis from adenoid cystic carcinoma of the head and neck are presented. The metastases presented more than 1 year (14 months to 5.5 years) after the primary tumor had been successfully treated without any evidence of local recurrence. Computed tomography of the intracranial metastasis demonstrated well-demarcated, hyperdense, enhancing extraaxial masses indistinguishable from meningioma. An intracranial extraaxial mass lesion with the appearance of a meningioma in a patient with known adenoid cystic carcinoma of the head and neck, regardless of the presence or absence of local recurrence, should be considered as metastasis until proved otherwise.
authors.forename: Y Y
authors.initials: YY
authors.lastname: Lee
authors.forename: M
authors.initials: M
authors.lastname: Castillo
authors.forename: C
authors.initials: C
authors.lastname: Nauert
mesh_terms: D000328:Adult; D001932:Brain Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary*; D003528:Carcinoma, Adenoid Cystic / Q000000981:diagnostic imaging / Q000556:secondary*; D003937:Diagnosis, Differential; D005260:Female; D006258:Head and Neck Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000000981:diagnostic imaging; D008579:Meningioma / Q000000981:diagnostic imaging; D008875:Middle Aged; D014057:Tomography, X-Ray Computed