title: Association of primary intracranial meningioma and cutaneous meningioma of external auditory canal: a case report and review of the literature.
abstract: A cutaneous meningioma of the external auditory canal occurred in a 48-year-old Filipino woman who had undergone subtotal resection of a dural-based intracranial meningioma at the ipsilateral cerebellopontine angle 36 months previously. Radiologic findings demonstrated a recurrence of intracranial meningioma with surface erosion and heterogeneous densities of the mastoid bone, without extension to the area of the external auditory canal. Meningioma in the external ear canal is extremely rare. To our knowledge, there have been only two previously reported cases, both without intracranial lesion. In this case, the auditory canal lesion may represent either an ectopic meningioma arising from an arachnoid cell rest or an occult direct extension from intracranial menigioma.
authors.affiliation: Department of Pathology, Harbor-UCLA Medical Center, Torrance, Calif 90509, USA.
authors.forename: B
authors.initials: B
authors.lastname: Hu
authors.forename: M
authors.initials: M
authors.lastname: Pant
authors.forename: M
authors.initials: M
authors.lastname: Cornford
authors.forename: I
authors.initials: I
authors.lastname: Walot
authors.forename: S K
authors.initials: SK
authors.lastname: Peng
mesh_terms: D000199:Actins / Q000032:analysis; D001932:Brain Neoplasms / Q000737:chemistry / Q000000981:diagnostic imaging / Q000473:pathology*; D002864:Chromogranins / Q000032:analysis; D004424:Ear Canal; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007633:Keratins / Q000032:analysis; D008579:Meningioma / Q000737:chemistry / Q000473:pathology / Q000556:secondary*; D008875:Middle Aged; D018396:Mucin-1 / Q000032:analysis; D009382:Neoplasms, Unknown Primary / Q000737:chemistry / Q000000981:diagnostic imaging / Q000473:pathology*; D012878:Skin Neoplasms / Q000737:chemistry / Q000473:pathology / Q000556:secondary*; D016708:Synaptophysin / Q000032:analysis; D014057:Tomography, X-Ray Computed
chemical_list: D000199:Actins; D002864:Chromogranins; D018396:Mucin-1; D016708:Synaptophysin; D007633:Keratins