نتایج جستجو برای: schwannomas

تعداد نتایج: 1871  

Journal: :Turkish neurosurgery 2007
Ayşe Karataş Merih Iş Umran Yildirim Feyzullah Akyüz Ferruh Gezen

Spinal schwannomas are benign tumors arising from spinal nerve root sheaths. These are the most common intradural extramedullary spinal tumors. Schwannomas are mostly solid or heterogeneous solid tumors. Cystic schwannomas are rare lesions. We present a 27-year-old woman with an intradural extramedullary cystic tumor in the lower thoracic region who complained of back pain and walking difficult...

Journal: :Journal of diagnostic pathology and oncology 2023

Schwannomas are peripheral nerve sheath benign tumors which arise from the schwann cells. These neoplasms most frequently seen in 3 to 6 decade of life and affecting limbs followed by head neck region. Oropharyngeal vallecular involvement schwannomas is extremely rarely reported previous literature. We report a case 25 year old male with lesion vallecula was subsequently diagnosed as on histopa...

2012
Rui Miguel Ferreira Rato Miguel Correia João Paulo Cunha Pedro Sutil Roque Rui Miguel Ferreira

Schwannomas are tumors arising from the Schwann cells of the neural sheath ofmotor and sensory nerves. They are seen in all cranial nerves except optic and olfactory. They are also called neurilemmomas, neurinomas, and perineural fibroblastomas (7). They arise focally from the sheath of the nerve fascicle and present as well-defined eccentrically placed masses. This allows their dissection from...

Journal: :The Indian journal of chest diseases & allied sciences 2014
Susmita Kundu Debabani Biswas Swapnendu Misra Shantanu Dutta Annoy Sen

Schwannomas arising from vagus nerve sheath are rare mediastinal neurogenic tumours. Schwannomas usually arise from left hemithorax. Unlike a hamartoma, radiologically, calcification is rarely seen in schwannomas. We present the rare case of an ancient schwannoma arising from vagus nerve sheath from the right hemithorax presenting with gross calcification.

2014
Hiroaki OKAMOTO Toshihiro MINETA Tomihiro WAKAMIYA Haruhisa TSUKAMOTO Toshiro KATSUTA Hiroyuki NAKAGAKI Toshio MATSUSHIMA

Subfrontal schwannomas arising from the olfactory groove are rare and their origin remains uncertain because olfactory bulbs do not possess Schwann cells. We present two cases of subfrontal schwannomas treated with surgical resection. In one case, the tumor was located between the endosteal and meningeal layers of the dura mater. This rare case suggests that subfrontal schwannomas may originate...

Journal: :AJR. American journal of roentgenology 1998
R L Karpati L A Loevner D M Cunning D M Yousem S Li R S Weber

chwannomas are tumon arising Ilom the myelin-producing Schwann cells of the peripheral sensory nervous system. Of those occuning in the head and neck region, most are infracranial. lnvolvement of cranial nerves containing motor fibers alone is uncharacteristic. Schwannomas of the l2th cranial nerve are rare, with most originating intracranially, although some may extend extracranially with prol...

2012
William Yoon Kari Paulson Paul Mazzara Sweety Nagori Mohammed Barawi Richard Berri

Schwannomas are generally slow growing asymptomatic neoplasms that rarely occur in the GI tract. However, if found, the most common site is the stomach. Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal tumors of the gastrointestinal tract, and 60-70% of them occur in the stomach. Owing to their typical presentation as submucosal neoplasms, gastric schwannomas and GISTs ap...

Journal: :Neurologia medico-chirurgica 2013
Toshiyuki Amano Yuhei Sangatsuda Nobuhiro Hata Daisuke Inoue Megumu Mori Akira Nakamizo Koji Yoshimoto Masahiro Mizoguchi Tomio Sasaki

A 74-year-old female suffered hearing disturbance in the right ear persisting for several years, followed by sudden onset of right facial nerve palsy. Her symptoms gradually worsened and neuroradiological imaging revealed a 4-cm cerebellopontine angle (CPA) tumor. Intraoperatively, the tumor was found to originate from the facial nerve. Total removal of the tumor was achieved, followed by a spl...

2011
Shawn T Joseph Aliasgar V Moiyadi Prathamesh S Pai Deepa Nair

Facial nerve schwannomas are rare conditions which can mimic many other conditions. A series of patients with facial nerve schwannomas were treated in our department, all of whom had a delay in diagnosis resulting in a significant morbidity. This prompted us to present this rare case series of schwannomas along different segments of facial nerve and also review the literature on such tumors—the...

Journal: :American Journal of Case Reports 2012

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