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https://www.readbyqxmd.com/read/28338216/the-diversified-function-and-potential-therapy-of-ectopic-olfactory-receptors-in-non-olfactory-tissues
#1
REVIEW
Zhe Chen, Hong Zhao, Nian Fu, Linxi Chen
Olfactory receptors (ORs) are mainly distributed in olfactory neurons and play a key role in detecting volatile odorants, eventually resulting in the production of smell perception. Recently, it is also reported that ORs are expressed in non-olfactory tissues including heart, lung, sperm, skin and cancerous tissues. Interestingly, ectopic ORs are associated with the development of diseases in non-olfactory tissues. For instance, ectopic ORs initiate the hypoxic ventilatory responses and maintain the oxygen homeostasis of breathing in the carotid body when oxygen levels decline...
March 24, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28324801/schwannoma-of-the-descending-loop-of-the-hypoglossal-nerve-case-report
#2
Giulio Illuminati, Giulia Pizzardi, Rocco Pasqua, Piergaspare Palumbo, Francesco Vietri
INTRODUCTION: Schwannomas of the descending loop of the hypoglossal nerve are very rare. They are slow-growing tumors that may masquerade a carotid body tumor. PRESENTATION OF CASE: A 60-year-old female was referred for a latero-cervical mass appearing as a chemodectoma at CT-scan. At operation, a 2cm mass arising from the descending loop of the hypoglossal nerve was resected en bloc with the loop itself and a functional lymphadenectomy was associated. Post-operative course was uneventful and the patient is free from disease recurrence at one year follow-up...
March 7, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28321772/paragangliomas-of-the-head-and-neck-an-overview-from-diagnosis-to-genetics
#3
Michelle D Williams
Paragangliomas (PGL) develop from the parasympathetic system in the head and neck (HN) and arise primarily in four distinct areas: Carotid body, vagal, middle ear, and larynx. Globally, the diagnosis and morphologic features are the same regardless of anatomic site, however the incidence, frequency of genetic alterations/syndromes and differential diagnosis vary. It is now recognized that nearly 40% of all HN PGLs are hereditary, including a significant subset without a known family history. Now pathologists are central to the evaluation for diagnosis and further management of patients with HNPGLs...
March 20, 2017: Head and Neck Pathology
https://www.readbyqxmd.com/read/28291932/online-dosimetric-evaluation-of-larynx-sbrt-a-pilot-study-to-assess-the-necessity-of-adaptive-replanning
#4
Weihua Mao, Timothy Rozario, Weiguo Lu, Xuejun Gu, Yulong Yan, Xun Jia, Baran Sumer, David L Schwartz
PURPOSE: We have initiated a multi-institutional phase I trial of 5-fraction stereotactic body radiotherapy (SBRT) for Stage III-IVa laryngeal cancer. We conducted this pilot dosimetric study to confirm potential utility of online adaptive replanning to preserve treatment quality. METHODS: We evaluated ten cases: five patients enrolled onto the current trial and five patients enrolled onto a separate phase I SBRT trial for early-stage glottic larynx cancer. Baseline SBRT treatment plans were generated per protocol...
January 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28262005/parotid-or-carotid-misled-by-site
#5
Ruchita Tyagi, Manish Munjal, Pavneet Kaur, Harpreet Kaur, Neena Sood
We present an interesting scenario where a 64 years old male presented with a long standing painless, infra-auricular swelling, which had progressively increased in size. Based on the site, the clinical impression was of a salivary gland lesion and FNAC was performed. The smears were unusually cellular and had necrotic background. The cytological diagnosis was a cystic neoplasm of salivary gland, possibly mucoepidermoid carcinoma. Warthin's tumor was also kept in differential. However, the radiological investigations, which were made available after the FNAC report were conflicting with cytological diagnosis of a malignancy and were characteristic of a carotid body tumor, generally a benign neoplasm...
March 6, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28245992/overt-and-subclinical-baroreflex-dysfunction-following-bilateral-carotid-body-tumor-resection-pathophysiology-diagnosis-and-implications-for-management
#6
REVIEW
Michael G Z Ghali, Visish M Srinivasan, Ehab Hanna, Franco DeMonte
Carotid body paragangliomas are rare, usually benign, tumors arising from glomus cells of the carotid body. Bilateral involvement is present in ∼5% of sporadic cases and up to one-third of familial cases. In the majority of patients undergoing bilateral resection of carotid body tumors (CBTs), a condition known as baroreflex failure syndrome (BFS) develops following resection of the second tumor characterized by headache, anxiety, emotional lability, orthostatic lightheadedness, hypertension, and tachycardia...
February 25, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28239052/an-atypical-case-of-recurrent-carotid-body-carcinoma-in-a-young-adult-dog-histopathological-immunohistochemical-and-electron-microscopic-study
#7
Angeline Ping Ping Teh, Watanyoo Pratakpiriya, Yuichi Hidaka, Hiroyuki Sato, Takuya Hirai, Ryoji Yamaguchi
A 3.5-year-old female Chihuahua was presented with complaint of neck pain, intermittent cough and dysphagia. Physical examination and diagnostic imaging of neck region revealed a solid and highly vascularized mass involving the retropharyngeal region. Histologically, the mass showed an atypical zellballen pattern which comprised of high density of type I chief cells with high nuclear cytoplasmic ratio and separated by delicate fibrovascular stroma. Immunoreactivity for neuroendocrine markers was diffusely positive in cytoplasm of tumor cells...
February 27, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28199074/inflammatory-markers-and-brain-derived-neurotrophic-factor-as-potential-bridges-linking-bipolar-disorder-and-cardiovascular-risk-among-adolescents
#8
Jessica K Hatch, Gustavo Scola, Omodele Olowoyeye, Jordan E Collins, Ana C Andreazza, Alan Moody, Anthony J Levitt, Bradley H Strauss, Krista L Lanctot, Benjamin I Goldstein
OBJECTIVE: Bipolar disorder (BD) is associated with increased rates of cardiovascular disease (CVD). Brain-derived neurotrophic factor (BDNF) and inflammatory markers are leading biomarkers in BD. We examined whether these biomarkers underlie the link between BD and CVD proxies among adolescents with bipolar spectrum disorders. METHODS: Subjects were 60 adolescents, 13-19 years old (40 with BD and 20 healthy controls [HCs]). Semistructured interviews determined diagnoses based on DSM-IV...
February 14, 2017: Journal of Clinical Psychiatry
https://www.readbyqxmd.com/read/28187022/carotid-body-paraganglioma-a-rare-tumor-with-serious-anesthetic-challenges
#9
Angela T Truong, Sudip Thakar, Dam-Thuy Truong
No abstract text is available yet for this article.
February 10, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28118794/concomitant-surgical-treatment-of-symptomatic-carotid-artery-disease-with-a-coexisting-shamblin-i-carotid-body-tumor
#10
Carlos A Hinojosa, Javier E Anaya-Ayala, Hugo Laparra-Escareno, Adriana Torres-Machorro, Rene Lizola, Armando Gamboa-Domínguez
Symptomatic carotid artery atherosclerotic disease is an indication for carotid artery endarterectomy. The coexistence of carotid body tumors (CBTs) with symptomatic carotid disease is rarely encountered and adds significant challenges to vascular surgeons, with a reported overall mortality for patients who undergo endarterectomy and tumor excision of 8.8%, as opposed to the 2% for those who had CBT excision only. We describe the case of a 79-year-old female who experienced an acute cerebrovascular accident in the left hemisphere; duplex ultrasound revealed high-grade carotid stenosis in the left side and the presence of a Shamblin I CBT...
February 2017: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28109497/management-of-carotid-body-tumor-in-pediatric-patients-a-case-report-and-review-of-the-literature
#11
Apanisile Ifeoluwa, István Lázár, Éva Szövördi, Tamás Karosi
Carotid body tumors (CBTs) are rare types of extra-adrenal paragangliomas, which originate from the neuroendocrine cells of the adventitial layer of carotid bifurcation. An 8-year-old girl was admitted to our department with left-sided and pulsating neck swelling, which progressively grew over several months. The patient had no family history of CBTs. Computed tomography (CT) and CT angiography (CTA) scans revealed a contrast material enhancing, hypervascularized mass involving the left carotid bifurcation, internal carotid artery (ICA), and external carotid artery (ECA), respectively...
February 2017: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/28104014/-individualized-treatment-of-bilateral-carotid-body-tumor
#12
Y R Feng, X H Chen, X J Kou, Y L Bai, F Q Lu, J Yang, B C Wang
Objective: To investigate individualized therapeutic strategy for bilateral carotid body tumors. Methods: Clinical data of 16 patients with bilateral carotid body tumor treated from January 2003 to August 2016 were retrospectively studied. Of the 16 patients, 9 were males and 7 were females; 5 were sporadic and 11 were familial; 8 cases were observed, 1 cases was malignant and treated with chemotherapy, and 7 cases were treated with surgery. The treatment course, perioperative complications and clinical efficacy were assessed...
January 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28028970/diagnostic-and-therapeutic-difficulties-in-carotid-body-paragangliomas-based-on-clinical-experience-and-a-review-of-the-literature
#13
Karolina Dorobisz, Tadeusz Dorobisz, Hanna Temporale, Tomasz Zatoński, Marzena Kubacka, Mariusz Chabowski, Andrzej Dorobisz, Tomasz Kręcicki, Dariusz Janczak
BACKGROUND: Paragangliomas are rare neuroendocrine tumors, representing 0.03% of all tumors. Half of them develop in the head and neck, and among these 50% are sporadic cervical tumors. OBJECTIVES: The aim of the study was to carry out an epidemiological and clinical analysis of paraganglioma patients diagnosed and treated at the authors' clinics between 1985 and 2014. MATERIAL AND METHODS: The medical data of 47 patients were analyzed. All the patients were qualified for surgery...
November 2016: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28005819/magnetic-resonance-imaging-and-magnetic-resonance-angiography-findings-of-external-carotid-artery-aneurysm-and-coexisting-carotid-body-tumor
#14
Vahit Mutlu, Hayri Ogul
Carotid body tumors originate from paraganglionic tissue in the bifurcation of the common carotid artery. Magnetic resonance imaging is a frequently used diagnostic method in the preoperative diagnosis of these tumors and provides appropriate information for surgical planning. In this study, the authors emphasize magnetic resonance imaging and magnetic resonance angiography findings of the external carotid artery aneurysm associated with carotid body tumor. This highlights that the diagnosis of carotid artery aneurysms is essential to avoid accidental injury to the vessel during tumor surgery...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28001459/long-term-effect-of-adrenalectomy-on-cardiovascular-remodeling-in-patients-with-pheochromocytoma
#15
Bohumil Majtan, Tomáš Zelinka, Ján Rosa, Ondřej Petrák, Zuzana Krátká, Branislav Štrauch, Vladimír Tuka, Alice Vránková, David Michalský, Květoslav Novák, Dan Wichterle, Jiří Widimský, Robert Holaj
CONTEXT: Catecholamines may contribute to the accumulation of collagen fibers and extracellular matrix in the arterial and myocardial wall due to various mechanisms. Reversibility of this process has not been studied on both structures simultaneously. OBJECTIVE: This study aimed to clarify the long-term effect of catecholamines' excess normalization on carotid and myocardial wall changes in patients with pheochromocytoma or functional paraganglioma (PHEO) after tumor removal...
December 21, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27942896/an-evaluation-on-novel-application-of-cone-beam-ct-imaging-with-multi-volume-technique-in-carotid-body-tumor
#16
Lijia Cui, Guangchao Gu, Linchao Ye, Bao Liu, Jiang Shao, Changwei Liu, Yuehong Zheng
Due to the high risk of vascular and nerve damage during surgery, precise pre-operative evaluation of carotid body tumor (CBT) is important. We aim to apply intra-operative contrast-enhanced cone-beam CT (CBCT) with multi-volume technique in CBT evaluation, where the tumor, patent carotid arteries, and skull are demonstrated in three different colors, and to compare this novel technique with traditional computed tomography angiography (CTA). Seven CBT patients scheduled for traditional surgical removal were enrolled in this study between October 2013 and March 2016...
December 10, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27923112/the-double-mandibular-osteotomy-for-vascular-and-tumor-surgery-of-the-parapharyngeal-space
#17
Thomas Schlieve, Eric R Carlson, Michael Freeman, Ryan Buckley, Josh Arnold
PURPOSE: The purposes of this study are to describe our experience using a double mandibular osteotomy for access to the parapharyngeal space in vascular and tumor surgery and to report on the outcomes and complications of this procedure. PATIENTS AND METHODS: We designed and implemented a case series to review the medical records of all patients treated with a double mandibular osteotomy for parapharyngeal space access from 1994 to 2016. Patient demographic characteristics, indications for the procedure, outcomes, and complications were recorded...
November 15, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27902883/metastatic-carotid-body-paraganglioma-of-lungs-and-lymph-nodes-unsuspected-diagnosis-on-ebus-tbna
#18
Kalpana Kumari, Deepali Jain, Rohit Kumar, Anant Mohan, Rakesh Kumar
Paragangliomas are tumors that originate from the extra-adrenal chromaffin and nonchromaffin cells of neural crest origin. Lymph node metastases are common, while distant metastases to lung, liver, and bone are rare events and usually occur in the presence of a long standing clinically evident primary tumor. Primary diagnosis of paraganglioma at a metastatic site without a known primary is a diagnostic challenge. We report a case of an adult woman with incidentally detected metastasis to bilateral lungs from an occult carotid body paraganglioma, which presented a cytopathological diagnostic dilemma on EBUS-TBNA from paratracheal lymph nodes...
April 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/27871494/current-surgical-management-of-carotid-body-tumors
#19
Victor J Davila, James M Chang, William M Stone, Richard J Fowl, Thomas C Bower, Michael L Hinni, Samuel R Money
BACKGROUND: Carotid body tumors (CBTs) are rare. Management guidelines may include genetic testing for succinate dehydrogenase (SDH) mutations. We performed an institutional review of the surgical management of CBT. METHODS: A retrospective analysis (1994-2015) of CBT excisions at our institution was performed. Data obtained included demographics, genetic testing (if performed), intraoperative details, postoperative morbidity, and long-term outcomes. Data from the first CBT excision were included in patients with bilateral tumors...
December 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/27867439/evaluation-of-head-and-neck-paragangliomas-by-computed-tomography-in-patients-with-pheochromocytoma-paraganglioma-syndromes
#20
Ilona Michałowska, Anna Lewczuk, Jarosław Ćwikła, Aleksander Prejbisz, Urszula Swoboda-Rydz, Mariusz I Furmanek, Małgorzata Szperl, Andrzej Januszewicz, Mariola Pęczkowska
BACKGROUND: Hereditary head and neck paragangliomas (HNP) are very often associated with pheochromocytoma-paraganglioma syndromes, which are caused by mutations in genes encoding subunits of succinate dehydrogenase (SDHx) complex. The aim of this study was to determine the frequency and location of HNP among SDHx carriers. MATERIAL/METHODS: A total of 72 patients with SDHx mutations underwent computed tomography examinations of the head and neck. HNP were present in 44 (61...
2016: Polish Journal of Radiology
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