نتایج جستجو برای: schwannomas

تعداد نتایج: 1871  

Journal: :The Egyptian Journal of Otolaryngology 2023

Abstract Background Schwannomas of the nose and paranasal are extremely rare. Few schwannomas arising from within lateral wall have been reported to date. Case presentation A 32-year-old male presented us with complaints left-sided nasal obstruction a mass in his cavity. The evaluation revealed benign spindle cell lesion which was excised. final histopathology report schwannoma. Discussion tumo...

2007

Although very rare, cases of cauda equina tumours migrating several levels have been known to occur. We report two cases of cauda equina schwannomas which migrated from its primary site, one caudally and the other one rostrally as confirmed by magnetic resonance imaging perioperatively. The f irst patient was a 27-year-old man and the second a 41year-old man; both presented with back pain. This...

2005
Joo Han Kim Ju Han Lee Youn Kwan Park Taek Hyun Kwon Hung Seob Chung

Schwannomas are relatively common, benign tumors that are thought to arise from the nerve sheath cell. Schwannomas of the C1 root are extremely rare and seldom invade lateral masses because they gradually increase in size and can extend through the wide space behind the lateral mass instead of the intervertebral foramen. We present here an unusual case of a benign schwannoma that aggressively i...

Journal: :Clinical neurosurgery 2008
L Dade Lunsford Ajay Niranjan John C Flickinger Douglas Kondziolka

Acoustic neuromas (vestibular schwannomas) are generally slow-growing, intracranial extra-axial benign tumors that usually develop from the vestibular portion of the eighth nerve. Unilateral vestibular schwannomas account for approximately 8% of all intracranial tumors; one of every 100,000 individuals per year develops a vestibular schwannoma.103 Bilateral vestibular schwannomas are usually as...

Introduction: Brachial plexus schwannomas are extremely rare tumours of the head and neck region accounting for less than 5 % overall. Due to its rarity and anatomic complexity of the brachial plexus, schwannomas in this region present a diagnostic and surgical challenge to the surgeon.   Case Report: We present a case of a 56-year-old female who presented with a slow gr...

2007
Heidi R. Umphrey Mark E. Lockhart Philip J. Kenney

Schwannomas are tumors arising from cells of the nerve sheath. While schwannomas are commonly found in peripheral nerves and cranial nerves, these tumors are rarely found within the kidney and may be difficult to differentiate from renal cell carcinoma. Few cases have been reported in the literature, and very little has been described regarding the imaging appearance of these rare renal tumors....

2009
José Omar Navarro Fernández Alejandro Monroy Sosa Bernardo Cacho Díaz Víctor Andrés Arrieta Ramses Uriel Ortíz Leyva Ana María Cano Valdez Gervith Reyes Soto

Cervical intramedullary schwannomas are extraordinarily rare. Gross total resection is the best therapeutic option for these types of tumors. Although rare, intramedullary schwannomas should be considered as a differential diagnosis of intramedullary lesions since a good prognosis can be guaranteed to the majority of these patients. We present a case of a cervical intramedullary schwannoma surg...

2017
M. Tulli S. Bondi M. Bussi

Laryngeal schwannomas are extremely uncommon. We present a case of bulky supraglottic schwannoma with involvement of the preepiglottic and superior paraglottic spaces. Clinical findings, computed tomography and magnetic resonance images are presented. These characteristics are typical, however not specific to schwannomas. For definitive diagnosis, histology and immunohistochemistry are necessar...

2011
Akira Watanabe Hitoshi Ojima Shigemasa Suzuki Yasushi Mochida Isao Hirayama Yasuo Hosouchi Yasuji Nishida Kenji Kashiwabara Tetsuro Ohno Erito Mochiki Hiroyuki Kuwano

Schwannomas are a kind of neurogenic tumor. They are generally benign and originate primarily from the central and peripheral nerve. They rarely develop in the gastrointestinal tract: gastric schwannomas make up 0.2% of gastric neoplasms. A malignant gastric schwannoma is a comparatively rare tumor, a few cases have been reported until now. We present the case of a 34-year-old male patient diag...

Journal: :Folia neuropathologica 2004
Vincenzo Arena Fabio De Giorgio Cecilia M J Drapeau Giovanni Monego Domenico De Mercurio Arnaldo Capelli

Adrenal tumours are frequently incidental discoveries, and their therapy is a subject of controversial discussions. Herein we describe two cases of adrenal schwannoma discovered during autopsy. The accidental observation of two benign schwannomas of the adrenal gland on asymptomatic patients led to the hypothesis that the real frequency of this type of lesion was underestimated. Furthermore, th...

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