title: Usefulness of T2*-weighted MR sequence for the diagnosis of subfrontal schwannoma.
abstract: Subfrontal schwannomas are rare tumors that are usually diagnosed during surgery. They are often misdiagnosed as meningioma or esthesioneuroblastoma because of their similar clinical and radiological features. We report a case of schwannoma arising from the floor of the anterior cranial fossa that had radiological features similar to that of meningioma. However, T2*-weighted MR imaging revealed multiple foci of low signal intensities within the tumor related to microbleeds, which suggested a diagnosis of schwannoma that was confirmed by histopathology. This case report demonstrates the usefulness of T2*-weighted sequence in distinguishing meningioma from schwannoma, especially in cases where the tumor has an unusual location.
authors.affiliation: Department of Imaging Sciences and Interventional Radiology, Sree Chitra Tirunal Institute for Medical Sciences and Technology, 695011 Trivandrum, India. chandkesav@yahoo.com
authors.forename: K
authors.initials: K
authors.lastname: Santhosh
authors.forename: C
authors.initials: C
authors.lastname: Kesavadas
authors.forename: V V
authors.initials: VV
authors.lastname: Radhakrishnan
authors.forename: B
authors.initials: B
authors.lastname: Thomas
authors.forename: T R
authors.initials: TR
authors.lastname: Kapilamoorthy
authors.forename: A K
authors.initials: AK
authors.lastname: Gupta
mesh_terms: D000328:Adult; D035262:Cranial Fossa, Anterior; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D009442:Neurilemmoma / Q000175:diagnosis*; D019292:Skull Base Neoplasms / Q000175:diagnosis*