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https://www.readbyqxmd.com/read/28810100/ascending-colon-schwannoma-an-unusual-cause-of-acute-lower-gastrointestinal-bleeding
#1
Hassan Turaihi, Jed H Assam, Matthew Sorrell
This is a case report of a 61-year-old female who presented with acute lower gastrointestinal bleeding resulting from a schwannoma involving the ascending colon. The patient was successfully treated with laparoscopic hemicolectomy. Schwannoma involving the large bowel is a rare entity; only around 90 cases of colonic schwannomas are reported in world literature. Although the vast majority of these tumors demonstrate a slow growing and benign profile, recurrence and malignant transformation can occur. Given the exceptional rarity of this pathological process, much of what is currently understood about this disease comes from case studies...
January 2017: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28807344/pituicytoma-review-of-commonalities-and-distinguishing-features-among-ttf-1-positive-tumors-of-the-central-nervous-system
#2
REVIEW
Siba El Hussein, Cristina Vincentelli
Pituicytoma is a rare low-grade glial neoplasm that originates in the distribution of the neurohypophysis, including the posterior pituitary lobe and infundibular stalk. The tumor cells resemble pituicytes, which are specialized glial cells of the neurohypophysis. Pituicytoma can be misdiagnosed pre-operatively as a pituitary adenoma due to overlapping clinical and neuroimaging features between these two entities. Pituicytoma can also mimic other neoplasms of the sellar and parasellar regions microscopically - meningioma, schwannoma and pilocytic astrocytoma - and shares immunohistochemical expression of TTF-1 with spindle cell oncocytoma and granular cell tumor of the sellar region, suggesting a common histogenesis...
August 2017: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/28806327/long-term-quality-of-life-following-vestibular-schwannoma-excision-via-the-translabyrinthine-approach
#3
Stephen J Broomfield, Ashish K Mandavia, Jack S Nicholson, Osama Mahmoud, Andrew T King, Scott A Rutherford, Richard T Ramsden
OBJECTIVE: To assess postoperative quality of life (QOL) and other patient-reported outcomes following surgery for vestibular schwannoma. STUDY DESIGN: Cross-sectional retrospective case review using postal questionnaires. SETTING: Tertiary referral center. PATIENTS: Five hundred consecutive patients undergoing surgery for vestibular schwannoma. INTERVENTION(S): Patients undergoing surgery via the translabyrinthine approach (excluding neurofibromatosis type 2) under the senior author, with a minimum of 5 years follow-up, were included...
September 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28805352/vagus-nerve-schwannoma-in-the-right-upper-mediastinum
#4
WeiPeng Zhu, DongHong Chen
A 35-year-old woman was admitted to our hospital with an abnormal shadow on her chest roentgenogram. Computed tomography showed that a tumor was located in the right upper mediastinum. Resection of the tumor by video-assisted thoracoscopic surgery was performed. Operative findings determined that the tumor originated from the right vagus nerve and was diagnosed as schwannoma by pathological examination.
August 14, 2017: Thoracic Cancer
https://www.readbyqxmd.com/read/28802708/robotic-excision-of-large-retroperitoneal-schwannoma-with-video
#5
R Ragu, C Blanchard, G Meurette
No abstract text is available yet for this article.
August 9, 2017: Journal of Visceral Surgery
https://www.readbyqxmd.com/read/28802505/soft-tissue-tumors-of-uncertain-histogenesis-a-review-for-dermatopathologists
#6
REVIEW
Darya Buehler, Paul Weisman
The mesenchymal tumors discussed herein represent a heterogeneous group of neoplasms with distinctive morphologic, immunophenotypic, and molecular genetic features. These uncommon tumors often arise in the dermis and subcutis and can pose a major diagnostic challenge to dermatopathologists because they closely mimic melanoma, carcinoma, fibrous histiocytoma, schwannoma, or granulomatous inflammation. This article reviews the clinical presentation, histopathology, differential diagnosis, and diagnostic pitfalls of epithelioid sarcoma, clear cell sarcoma, perivascular epithelioid cell tumor, ossifying fibromyxoid tumor, pleomorphic hyalinizing angiectatic tumor, and hemosiderotic fibrolipomatous tumor...
September 2017: Clinics in Laboratory Medicine
https://www.readbyqxmd.com/read/28799319/ataxia-in-a-young-female
#7
R Jayanthi, K Monica, K Raja, C S Gauthaman, P P Arunkumar
Neurofibromatosis type 2 (NF2) is a genetically inherited disorder characterized by the presence of multiple central nervous system tumours, most pathognomonic being bilateral vestibular schwannomas with or without peripheral manifestations in the form of cataract or cutaneous neurofibromas. NF2 is an uncommon disorder compared to NF1. We describe a classical case of neurofibromatosis type 2 with florid clinical manifestations and characteristic neuroimaging features. We also briefly describe the literature pertaining to this rare disorder...
August 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28799152/-gastric-schwannoma-rare-differenzial-diagnosis-of-acute-upper-gastrointestinal-gi-bleeding
#8
Orestis Lyros, Stephan Schickel, Katrin Schierle, Albrecht Hoffmeister, Ines Gockel
Schwannomas are benign tumors derived from Schwann cells and their typical site of origin is the subcutaneous tissue of the extremities. Gastrointestinal localization of Schwannomas is extremely rare and the stomach is the prevalent site. Gastric schwannomas primarily occur in the gastric submucosa and are usually asymptomatic.We present a rare case of a solitary gastric schwannoma in a 51-year old male, which initially manifested with hematemesis by acute upper gastrointestinal (GI) bleeding. The upper GI-Endoscopy revealed a gastric submucosal tumor, 7 cm in size, located in the proximal corpus and fundus...
August 2017: Zeitschrift Für Gastroenterologie
https://www.readbyqxmd.com/read/28796095/intracanalicular-vestibular-schwannomas-initial-clinical-manifestation-imaging-classification-and-risk-stratification-for-management-proposal
#9
Elias Younes, Marion Montava, Mathilde Bachelard-Serra, Laurent Jaloux, Florent Salburgo, Jean Pierre Lavieille
INTRODUCTION: There is no consensus about the use of observation as a therapeutic modality for intracanalicular vestibular schwannoma (ICVS). The objective of this study was to describe tumor evolution, its correlation with initial size, stage of vestibular schwannoma, clinical presentation and to propose a risk classification for tumor growth with a therapeutic decision algorithm. METHODS: Fifty-three patients with ICVS were followed prospectively from 2010 to 2015...
August 8, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28796091/comparing-outcomes-following-salvage-microsurgery-in-vestibular-schwannoma-patients-failing-gamma-knife-radiosurgery-or-microsurgery
#10
Hyun-Jin Lee, Mi Joo Kim, Seung Hyun Koh, Won Seok Chang, In Seok Moon
OBJECTIVE: The increasing use of primary gamma-knife radiosurgery (GKS) for the treatment of vestibular schwannoma (VS) has led to a concomitant increase in the number of patients requiring salvage surgery for GKS failure. When patients underwent GKS as the primary treatment, it is known that dissecting tumor from adjacent nerves during salvage surgery is more difficult. In this report, we share our clinical experience with such patients and analyze the clinical findings of patients with tumor regrowth/recurrence...
August 8, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28796090/jacobson-s-nerve-schwannoma-presenting-as-a-middle-ear-mass-causing-pulsatile-tinnitus-a-case-report
#11
Kenny F Lin, Andrew T Turk, Ana Hae-Ok Kim
No abstract text is available yet for this article.
August 8, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28795017/malignant-renal-schwannoma-in-a-cat
#12
Monier Sharif, Adel Mohamed, Manfred Reinacher
A nine-year-old male European shorthair cat with rapidly enlarging mass at the left kidney doubted to be malignant was presented. The purpose of this study is to present the clinical, radiological and pathological findings of a primary renal tumor in the cat. Grossly, the mass mostly encapsulated the kidney. Histologically, excisional biopsy showed worrying histological features. A sarcoma-like tumor composed mainly of neoplastic spindle-shaped cells. Neoplastic nodules of aggregations of fusiform cells arranged in multidirectional bundles...
2017: Open veterinary journal
https://www.readbyqxmd.com/read/28794605/schwannoma-of-the-penis-presenting-as-a-scrotal-mass-rare-entity-with-an-uncommon-presentation
#13
Ujwal Kumar, Nawal Kishore Jha
Schwannomas are benign nerve sheath tumors that are seen either sporadically or in patients of neurofibromatosis. This tumor is common in head, neck, and extremities. Penis is a rare site for this tumor. To the very best of our knowledge, <34 cases of penile schwannoma have been reported in literature till now, but none had presented as scrotal mass. Here, we report a case of penile schwannoma in a 16-year-old male boy who presented in our outpatient department with a slowly growing scrotal mass. Our patient did not have any other feature of neurofibromatosis...
July 2017: Urology Annals
https://www.readbyqxmd.com/read/28794344/papillary-thyroid-carcinoma-with-desmoid-type-fibromatosis-a-clinical-pathological-and-immunohistochemical-study-of-14-cases
#14
Nami Takada, Mitsuyoshi Hirokawa, Masahiro Ito, Aki Ito, Ayana Suzuki, Miyoko Higuchi, Seiji Kuma, Toshitetsu Hayashi, Masao Kishikawa, Shuichi Horikawa, Akira Miyauchi
Papillary thyroid carcinoma (PTC) with desmoid-type fibromatosis (DTF) is characterized by genetic alterations of the fibroblasts. However, PTC-DTF is extremely rare, and the reports on such cases have been sporadic. Immunohistochemical staining using the antibody for beta-catenin is useful in diagnosing the variant. This report aims to describe the clinical, pathological, and immunohistochemical findings in 14 cases of PTC-DTF and to clarify the diagnostic significance of the variant. The patients included 9 women and 5 men, with a mean age of 49...
August 10, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28790251/-resection-of-a-posterior-mediastinal-tumor-using-intraoperative-motor-evoked-potential-monitoring-report-of-a-case
#15
Motoaki Yasukawa, Tsunenori Takatani, Masahiko Kawaguchi, Takeshi Kawaguchi, Norikazu Kawai, Takashi Tojo, Shigeki Taniguchi
A 20-year-old man with a posterior mediastinal tumor incidentally found on a chest X-ray was referred to our hospital. Chest computed tomography showed a 3 cm nodule located on the left side of the 10-11th thoracic vertebra, where the artery of Adamkiewicz is presumed to arise. He underwent left thoracotomy to remove the lesion. The tumor was safely resected with the assistance of intraoperative motor evoked potential(MEP) monitoring. The postoperative diagnosis was a benign schwannoma. In thoracic surgery for posterior mediastinal tumors, intraoperative MEP monitoring is useful for preventing paraplegia...
August 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28782320/an-unusual-schwannoma
#16
Siddharth K Waghmare, Unnati Desai, Vinaya S Karkhanis, Gayathri Amonkar, Jyotsna M Joshi
Mediastinal masses are commonly encountered and have multiple differentials. Although histopathological examination is gold standard, the location of the mass narrows the diagnosis. While thyroid, thymus, germ cell tumour or lymph node related masses are common in superior mediastinum, vascular or pleuro-pericardial masses are seen in middle mediastinum. Posterior mediastinal masses are commonly neurogenic tumours, schwannoma being the commonest. We discuss a case of cystic schwannoma presenting as superior mediastinal mass...
June 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/28781919/b-cell-lymphoma-presenting-as-multiple-nerve-sheath-tumors
#17
Jason Milton, Julie Renner, Victor Awuor
BACKGROUND: Diffuse Large B-cell Lymphoma (DLBCL) is the most common form of Non-Hodgkin lymphoma (NHL), accounting for 25-30 percent of cases in the United States.1 Extranodal sites are involved in approximately 40% of cases of DLBCL. CASE DESCRIPTION: In this report, we discuss the case of a patient with extranodal DLBCL within the cervical nerve roots that underwent surgical intervention due to the presence of cervical radiculopathy. CONCLUSION: The diagnosis of DLBCL was surprising given the appearance of the masses on MRI being similar to that of a neurofibroma or schwannoma...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28781804/schwannoma-of-the-hypoglossal-nerve-review-of-the-literature-based-on-an-illustrative-case
#18
Rosario Fornaro, Alexander Salerno, David Constantin Filip, Elisa Caratto, Michela Caratto, Marco Casaccia
Schwannomas are benign tumours that originate from the myelin sheath of peripheral nerves. They are characterised by a slow growth tendency. Benign schwannomas represent 35% of the head and neck district tumours. Hypoglossal schwannomas account for 5% of non-vestibular schwannomas, and malignant schwannomas occur very rarely. In the present case report, the case of a 49-year-old man who presented with paraesthesias in the left parotid and submandibular region, associated with sensation of foreign bodies and dysphagia for solids, is described...
August 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28781128/six-cases-of-sporadic-schwannomatosis-topographic-distribution-and-outcomes-of-peripheral-nerve-tumors
#19
G Chick, J Victor, N Hollevoet
The diagnosis of schwannomatosis is often overestimated and is based on the existence of multiple peripheral nerve tumors composed exclusively of schwannomas, in the absence of clinical signs of neurofibromatosis type 2 (NF2). Sporadic forms are much more frequent than familial forms. The objective of this study was to describe the distribution of peripheral nerve tumors and investigate the outcomes of schwannomas in the context of sporadic schwannomatosis. We conducted a retrospective study of patients who fulfilled clinical diagnostic criteria for sporadic schwannomatosis...
August 3, 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28775147/combination-therapy-with-c-met-and-src-inhibitors-induces-caspase-dependent-apoptosis-of-merlin-deficient-schwann-cells-and-suppresses-growth-of-schwannoma-cells
#20
Marisa A Fuse, Stephani Klingeman Plati, Sarah S Burns, Christine T Dinh, Olena Bracho, Denise Yan, Rahul Mittal, Rulong Shen, Julia N Soulakova, Alicja J Copik, Xue Zhong Liu, Fred F Telischi, Long-Sheng Chang, Maria Clara Franco, Cristina Fernandez-Valle
Neurofibromatosis type 2 (NF2) is a nervous system tumor disorder caused by inactivation of the merlin tumor suppressor encoded by the NF2 gene. Bilateral vestibular schwannomas (VS) are a diagnostic hallmark of NF2. Mainstream treatment options for NF2-associated tumors have been limited to surgery and radiotherapy; however, off-label uses of targeted molecular therapies are becoming increasingly common. Here we investigated drugs targeting two kinases activated in NF2-associated schwannomas, c-Met and Src...
August 3, 2017: Molecular Cancer Therapeutics
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