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Intracerebral Schwannoma

Report of a Case

A. A. M. Gibson, E. B. Hendrick and P. E. Conen

the adult population. A recent case report described a facial nerve Schwannoma which probably arose at 12 years of age. 4 The only report of involvement of the hypoglossal nerve was in a child with von Recklinghausen's syndrome. 1 Intracranial Schwannomas originate from the distal segment of the nerve root after it has penetrated the pia mater. This report describes a large temporal lobe tumor with features indistinguishable from those of a Schwannoma, in a 6-year-old boy. A search of the literature failed to reveal any record of an intracerebral Schwann cell

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Chitra Sarkar, V. S. Mehta and Subimal Roy

9. Gonzales-Pardo L , Brackett CE , Lansky LL : Facial nerve schwannoma in a 16-year-old girl. Childs Brain 7 : 220 – 224 , 1980 Gonzales-Pardo L, Brackett CE, Lansky LL: Facial nerve schwannoma in a 16-year-old girl. Childs Brain 7: 220–224, 1980 10. Ho KL : Schwannoma of the trochlear nerve. Case report. J Neurosurg 55 : 132 – 135 , 1981 Ho KL: Schwannoma of the trochlear nerve. Case report. J Neurosurg 55: 132–135, 1981 11. Hughes JT , Brownell B : Aberrant

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Yutaka Sawamura, Yoku Nakagawa, Toshio Ikota and Hiroshi Abe

nerve. Report of three cases. Surg Neurol 23: 507–512, 1985 11. Nakao S , Fukumitsu T , Ogata M , et al : [Facial nerve schwannomas: report of two cases.] No Geka 12 : 745 – 751 , 1984 (Jpn) Nakao S, Fukumitsu T, Ogata M, et al: [Facial nerve schwannomas: report of two cases.] No Geka 12: 745–751, 1984 (Jpn) 12. Nedzelski J , Tator C : Other cerebellopontine angle (non-acoustic neurinoma) tumors. J Otolaryngol 11 : 248 – 252 , 1982 Nedzelski J, Tator C: Other

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Akira Kudo, Michiyasu Suzuki, Naohiko Kubo, Kiyoshi Kuroda, Akira Ogawa and Yuzo Iwasaki

of five cases. J Laryngol Otol 97 : 65 – 72 , 1983 Bailey CM, Graham MD: Intratemporal facial nerve neuroma. A discussion of five cases. J Laryngol Otol 97: 65–72, 1983 3. Gonzales-Pardo L , Brackett CE , Lansky LL : Facial nerve schwannoma in a 16-year-old girl. Childs Brain 7 : 220 – 224 , 1980 Gonzales-Pardo L, Brackett CE, Lansky LL: Facial nerve schwannoma in a 16-year-old girl. Childs Brain 7: 220–224, 1980 4. Ichihashi T , Harano H , Sugiyama T , et al

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Robert L. Foote, Bruce E. Pollock, Michael J. Link, Yolanda I. Garces and Robert W. Kline

–188 cm); weight, 78.25 kg (range 45.4–126.6 kg). The median number of isocenters set, checked, and treated per patient was seven (range one–16 isocenters). The median duration of each isocenter treatment was 5.6 minutes (range 1–22.4 minutes). Lesion types treated included brain metastasis (nine patients), vestibular schwannoma (eight patients), malignant skull base lesion (six patients), arteriovenous malformation or dural arteriovenous fistula (five patients), meningioma (four patients), chordoma (two patients), facial nerve schwannoma (one patient), and

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Bilateral vidian nerve schwannomas associated with facial palsy

Case report and review of the literature

Jin Hwan Cheong, Jae Min Kim, Koang Hum Bak, Choong Hyun Kim, Young Ha Oh and Dong Woo Park

. Schwannomas arising from the facial nerve have rarely been reported, and they constitute only 0.8% of all intrapetrous mass lesions. 17 In a series of 527 cerebellopontine angle tumors reported on by King and Morrison, 11 there were 12 cases of facial nerve schwannomas in the petrous bone or intracranial cavity. Although facial nerve schwannomas generally involve any segment of the nerve, the authors reported that these lesions usually arose on the vertical and tympanic nerve segments. 11 , 14 , 17 The vidian nerve carries parasympathetic fibers from the greater

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Burak Sade and Joung H. Lee

proximal involvement than the facial hiatus; and 2) it occupied the Glasscock triangle of the middle fossa floor, where the GSPN would normally run ( Fig. 2 ). Although some authors have been able to distinguish these two neural structures at the time of tumor resection, 8 , 11 we and others 3 , 6 have not been able to identify them. This factor, however, does not seem to have a significant role in the overall postoperative outcome with respect to the facial nerve. 3 , 6 , 7 , 11 The hearing loss associated with facial nerve schwannomas, in general, may either be

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Walter D. Johnson, Lilia N. Loredo and Jerry D. Slater

-charged-particle radiosurgery of the pituitary gland: clinical results of 840 patients . Stereotact Funct Neurosurg 57 : 22 – 35 , 1991 28 Litre CF , Gourg GP , Tamura M , Mdarhri D , Touzani A , Roche PH , : Gamma Knife surgery for facial nerve schwannomas . Neurosurg 60 : 853 – 859 , 2007 29 Lunsford LD , Niranjan A , Flickinger JC , Maitz A , Kondziolka D : Radiosurgery of vestibular schwannomas: summary of experience in 829 cases . J Neurosurg 102 : Suppl 195 – 199 , 2005 30 Maire JP , Darrouzet V , Trouette R , San Galli S

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Christian Scheller, Jens Rachinger, Julian Prell, Malte Kornhuber and Christian Strauss

S chwannomas not arising from the vestibulocochlear nerve bundle are rare in CPA surgery. Authors of reports of large surgical series have noted that between 1.9 and 2.7% of tumors originate from the facial nerve. 21 Facial nerve paresis and hearing disturbances are the common symptoms of facial nerve schwannomas. 9 , 10 , 17 Preoperatively, it can be difficult to distinguish facial nerve schwannomas of the CPA from vestibular schwannomas, unless pronounced facial weakness or typical imaging signs are present. 4 , 6–8 Intermediate nerve schwannomas have

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Frederic Venail, Pascal Sabatier, Michel Mondain, François Segniarbieux, Christophe Leipp and Alain Uziel

palsy was caused by the removal of a vestibular nerve schwannoma using a translabyrinthine approach in 5 cases (41.7%), and in 1 case each (8.3%) after removal of a facial nerve schwannoma using a translabyrinthine approach, removal of a vestibular nerve schwannoma or a petroclival meningioma using a retrosigmoid approach, endolymphatic sac adenocarcinoma surgery, middle ear cholesteatoma surgery, brainstem astrocytoma surgery, or brainstem medulloblastoma surgery ( Table 1 ). The facial nerve injuries occurred in the CPA in 66.7% of cases, in the brainstem in 16