Naso-ethmoid schwannoma with intracranial extension: case report

Abstract

-Intranasal schwannomas are rare lesions, specially when they present with an intracranial extension. The fifth case in the medical literature of a naso-ethmoid schwannoma with extension into the anterior cranial fossa is presented. The magnetic resonance findings and the details of the combined intracranial / transfacial operative approach used are described. The possible origin and the clinical characteristics of this rare lesion are reviewed.KEY WORDS: schwannoma, intranasal schwannoma, paranasal sinus tumor. Schwannoma naso-etmoidal com extensão intracraniana: relato de casoRESUMO -Schwannomas intranasais são lesões raras, principalmente quando apresentam um extensão intracraniana. Estamos apresentando o quinto caso da literatura médica de um schwannoma naso-etmoidal com extensão para o interior da fossa craniana anterior. São descritos os achados da ressonância magnética e os detalhes da via de acesso cirúrgico combinada intracraniana/transfacial. A possível origem e as características clínicas dessa lesaõ rara são revistas. PALAVRAS-CHAVE: schwannoma, schwannoma intranasal, tumor de seio paranasal.

Schwannoma nasal cavity: a clinicopathological case report

“…1 Any nerve with a Schwann cell sheath may give origin to a schwannoma and so this neoplasm may develop in almost any part of the body. 2 Schwannoma commonly occur on the flexor aspect of extremities, posterior spinal nerve roots, mediastinum, retroperitoneum, cerebellopontine angle and rarely in head and neck region (25%). 3 Nerve sheath tumors of the head and neck region mainly involve the eighth cranial nerve with only 4% occurring in the nasal cavity.…”

Schwannoma of the lumbar spine

“…Schwannomas are peripheral nerve system tumors that arise from the Schwann cells proliferation in the nerve root sheaths 1,5,15 . They are usually well encapsulated, solid or cystic, located along the nerves or surrounded by them, causing compression symptoms 5,11 .…”

Giant Primary Schwannoma of the Left Nasal Cavity and Ethmoid Sinus

“…Previous reports indicate that 25–50% of schwannomas occur in the head and neck region, but tumours originating from the nasal cavity or paranasal sinuses are rare, with a reported rate of approximately 4% [ 1 , 2 ]. In 2001, approximately 40 cases of sinonasal schwannomas had been reported [ 3 ]. In 2016, we found just over 100 cases reported in the literature [ 4 ].…”