Olfactory Groove Schwannoma-Case Report-

Murakami, Mamoru; Tsukahara, Tetsuya; Nakakuki, Takuya; Ogino, Eiji; Aoyama, Takako

doi:10.2176/nmc.44.191

Cited by 31 publications

(18 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Intracranial schwannomas represent approximately 6% to 8% of all intracranial tumors and usually arise from the Schwann cell layer of vestibular branch of eighth nerve or less commonly from the fifth nerve, seventh nerve and lower cranial nerves 1,[6][7][8]10,15) . However, the olfactory and optic nerve lack a Schwann cell layer and thus are not prone to tumors from these nerves 14) .…”

Section: Discussionmentioning

confidence: 99%

“…Anterior cranial fossa schwannoma has many different characteristics contrary to other location schwannomas as follows : beginning at an earlier age (mean 32.2 years), affects mostly men (63%), calcification is rare (8%) and in imaging finding, the tumor is composed of the solid portion in C chiefly 1,[4][5][6]15) . Dissimilarly to typical characteristics of previously reported anterior cranial fossa schwannoma, our case showed cystic portion and tumor margin had thick calcification on preoperative imaging study (Table 1).…”

Section: Discussionmentioning

confidence: 99%

“…In the differential diagnosis of an extra-axial anterior cranial fossa involving cribriform plate with extension to the ethmoidal sinus, metastatic disease, meningioma, neuroblastoma and others should be included 2,6,7,12,15) . But, in our case, intraoperative finding was sufficient for typical schwannoma because of the tumor's hypovascularity, about 30 cc cystic fluid collection with well demarcated tumor capsule margin and marked bony erosion.…”

Section: Discussionmentioning

confidence: 99%

“…However, the optic and olfactory nerve do not have Schwann cell layer and therefore schwannoma, theoretically, cannot develop in these nerves 1,[5][6][7][8]10,15) . Anterior cranial fossa schwannoma are very rare and only 34 such cases have been reported in the world literature so far 1,7,11,13) .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Olfactory Schwannoma-Case Report-

Choi

Sung

Song

et al. 2009

J Korean Neurosurg Soc

View full text Add to dashboard Cite

J Korean Neurosurg Soc 45 : [103][104][105][106] 2009 Intracranial schwannomas preferentially arise from the vestibular branch of the eighth nerve, and rarely from the trigeminal nerve, facial nerve, and lower cranial nerves. Anterior cranial fossa schwannomas are extremely uncommon and few details about them have been reported. The patient was a 39-year-old woman whose chief complaints were anosmia and frontal headache for 2 years. The gadolinium (Gd)-enhanced magnetic resonance imaging (MRI) showed an extra-axial mass from ethmoid sinus to right frontal base region near the midline, with solid enhancement in lower portion and multicystic formation in upper portion. The tumor was totally resected via basal subfrontal approach. At operation, the tumor had cystic portion with marginal calcification and the anterior skull base was destructed by the tumor. The olfactory bulb was involved, and the tumor capsule did not contain neoplastic cells. The histopathological diagnosis was schwannoma. We report a rare case of anterior cranial fossa schwannoma with literature review.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Olfactory Schwannoma-Case Report-

Choi

Sung

Song

et al. 2009

J Korean Neurosurg Soc

View full text Add to dashboard Cite

show abstract

“…Whether sinonasal schwannomas can be derived from the olfactory nerve components is still a controversial issue [2], but recent studies point more likely to its origin in the meningeal or ethmoidal branches of the trigeminal nerve [3]. The most frequent locations in the sinonasal tract are: the ethmoidal sinus, maxillary sinus, nasal cavity and nasal septum.…”

mentioning

confidence: 99%

Unusual Association of Sphenoidal Schwannoma with Nasosinusal Polyposis

Álvarez-Montero¹,

Mancheño-Losa²,

Rodríguez-Castejón³

et al. 2017

JOENTR

View full text Add to dashboard Cite

Schwannomas or neurilemmomas are tumors of benign nerve sheath, and between 25 and 45% of all arise in the head and neck region. Less than 4 % are found in the sinonasal tract and their diagnosis may have difficulty due to non-specific symptoms and image characteristics. In several cases, complete surgical removal by endoscopic approach is the treatment of choice in these tumors. We report the management of an unusual case of sphenoid sinus schwannoma in a 70-years-old male along with massive bilateral nasal polyposis and severe symptoms. The association with severe sinonasal polyposis has not been previously described.Keywords: Schwannoma; Neurilemmoma; Sinonasal polyposis the III, IV and VI cranial nerves, in the autonomic nervous system, in the carotid plexus or sphenopalatine ganglion [1]. Whether sinonasal schwannomas can be derived from the olfactory nerve components is still a controversial issue [2], but recent studies point more likely to its origin in the meningeal or ethmoidal branches of the trigeminal nerve [3]. The most frequent locations in the sinonasal tract are: the ethmoidal sinus, maxillary sinus, nasal cavity and nasal septum. The sphenoid and frontal sinuses are rarely affected [1].The non-specific signs and symptoms of sinonasal schwannomas are the same of those of any mass of the anterior or posterior nasal tract [1], and their imaging findings are rather unspecific [4,5]. Differential diagnosis should be made with other more common skull base tumours or space-occupying mass lesions such as sphenoid mucocele, angiofibroma, inverted papilloma, clival chordoma, chondrosarcoma, meningioma, pituitary adenomas, craniopharyngiomas and plasmacytoma [4,5].Complete surgical excision is considered the preferred treatment and most lesions may be removed by standard endoscopic techniques [1,6,7], although different approaches must be done if intracranial extension is present [1,7].Here in we report an unusual case of sphenoidal schwannoma coupled with sinonasal massive polyposis, and we focus the role of computed tomography (CT) and magnetic resonance image (MRI) on the differential diagnosis and the surgical endoscopic approach. Case ReportA 70-year-old male was attended at the Emergency Department of our hospital, with nasal obstruction, hyposmia, severe headache, ocular pain and diplopia. He had medical history of arterial hypertension, deep venous thrombosis and nasal polyposis in treatment with hydrochlorothizide, acenocumarol and topical intranasal corticosteroids. There was no personal or family history of neurofibromatosis disease. The physical examination showed a VI left cranial nerve palsy. Noncontrast emergency CT revealed a complete sinonasal polyposis opacification with a 5 x 3.5 cm sphenoid sinus expansive lesion. There was no calcification or bone destruction (Figure 1).The initial suspicion was sphenoidal mucocele, and MRI was performed. The MRI showed an expansive mass of the 4.1 x 4.4 x 4.2 cm sphenoid sinus expansive mass, heterogeneous on T2 weighted images and isointense...

show abstract