Peripheral Nerve Sheath Tumors of Head and Neck: Imaging-Based Review of World Health Organization Classification

Journal of Computer Assisted Tomography
Ahmed Abdel Khalek Abdel RazekNermeen A Elsebaie

Abstract

We aim to review the imaging appearance of peripheral nerve sheath tumors (PNSTs) of head and neck according to updated fourth edition of World Health Organization classification. Peripheral nerve sheath tumor can be sporadic or associated with neurofibromatosis type 1, neurofibromatosis type 2, and schwannomatosis. Schwannoma is the most common benign PNST that can be intracranial or extracranial and appears heterogeneous reflecting its histologic composition. Melanotic schwannoma is a different entity with high prediction of malignancy; it shows hypointense signal on T2-weighted image. Neurofibroma can present by localized, plexiform, or diffuse lesion. It usually appears homogeneous or shows a characteristic target sign. Perineurioma can be intraneural seen with the nerve fiber or extraneural appearing as a mass. Solitary circumscribed neuroma and neurothekeoma commonly present as dermal lesions. Nerve sheath myxoma may exhibit high signal on T1 weighted image. Benign triton tumors can be central, aggressive lesion, or peripheral nonaggressive lesion. Granular cell tumor shows hypointense signal on T2 weighted image. Neuroglial heterotopia most commonly occurs in the nasal cavity. Ectopic meningioma arises from ectopic arach...Continue Reading

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Citations

Apr 4, 2021·Oral Oncology·John Lennon Silva CunhaRicardo Luiz Cavalcanti de Albuquerque-Júnior
Apr 22, 2021·BMC Gastroenterology·Maki AmanoMasahiro Okada

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