title: Rare extracranial localization of primary intracranial neoplasm.
abstract: Meningioma, craniopharyngeoma and glioma are mainly intracranial lesions. Nevertheless, in rare cases these entities may occur solely as extracranial lesions that may present as intranasal/sinusoidal masses, with headaches and nasal obstruction. We present three cases of common intracranial tumors, with purely extracranial extension. The three described cases demonstrate, that preoperative MRI and CT imaging is important for differential diagnosis to exclude intracranial connections of the tumors. A definitive diagnosis requires specialized immunohistochemical examinations. In all cases of intranasal or pharyngeal neoplasm the diagnosis of meningioma, craniopharyngeoma and glioma should be considered as differential diagnosis to optimize the surgical procedure.
authors.affiliation: Department of Oto-Rhino-Laryngology, Head and Neck Surgery University Medical Center Freiburg, Germany. arndt@hno.ukl.uni-freiburg.de
authors.forename: Susan
authors.initials: S
authors.lastname: Arndt
authors.forename: Thorsten
authors.initials: T
authors.lastname: Wiech
authors.forename: Irina
authors.initials: I
authors.lastname: Mader
authors.forename: Antje
authors.initials: A
authors.lastname: Aschendorff
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Maier