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pleomorphic adenoma

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https://www.readbyqxmd.com/read/28927057/effect-of-epithelial-growth-factor-on-matrix-metalloproteinase-2-and-e-cadherin-%C3%AE-catenin-expression-in-an-in-situ-model-of-tumorigenesis
#1
Natalia Festugatto Navarini, Vera Cavalcanti De Araújo, Marcelo Sperandio, Marcelo Henrique Napimoga, Lucas Novaes Teixeira, Ney Soares De Araújo, Elizabeth Ferreira Martinez
The aim of the present study was to analyze the in vitro effect of various doses of epidermal growth factor (EGF; 5 and 10 ng/ml) on matrix metalloproteinase-2 (MMP-2) secretion and E-cadherin/β-catenin expression by co-cultured cells that mimic an in situ carcinoma ex-pleomorphic adenoma, where benign myoepithelial cells from a pleomorphic adenoma surround malignant epithelial cells. EGF was supplemented in various doses and the effects were evaluated following four days of cell culture. ELISA was performed to determine MMP-2 secretion levels...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28918184/removal-of-recurrent-intraorbital-tumour-using-a-system-of-augmented-reality
#2
P Scolozzi, P Bijlenga
The most crucial step in the management of pleomorphic adenoma of the lacrimal gland is choosing the optimal approach for excision. We report the successful removal of a recurrent pleomorphic adenoma of the lacrimal gland in a 42-year-old woman using a specific microscope-based system of augmented reality.
September 13, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28913321/mixed-tumor-in-deep-lobe-and-versatility-of-acellular-dermal-matrix
#3
Jin Hwan Byun, Jung Soo Lim, Hye Kyung Lee
Frey's syndrome and infra-auricular depressed deformities are the ones of the most common complications that can occur after total parotidectomy. We report 1 case of pleomorphic adenoma occurred in the deep lobe that obtained good results from using acellular dermal matrix (ADM) after total parotidectomy. A 24-year-old man visited the hospital with oval shape mass in right mandibular angle which of 4 cm in size was found in the deep lobe of right parotid gland from Magnetic resonance imaging scanning and a pleomorphic adenoma was suspected...
June 2017: Arch Craniofac Surg
https://www.readbyqxmd.com/read/28900471/metastasizing-pleomorphic-adenoma-of-the-parotid-gland
#4
Javier Soteldo, Nathasha Aranaga
Salivary gland tumours are estimated to represent approximately 3% of all head and neck tumours. About 70-80% of these neoplasms occur in the major salivary glands, with the parotid gland being the most commonly affected site. The metastasizing pleomorphic adenoma (MPA) has histological characteristics of pleomorphic adenoma, but it has the capacity to generate local recurrences and distant metastases (mainly bones, lungs, and lymph nodes). Despite the fact that some authors consider it to be a benign neoplasia, the 2015 World Health Organisation (WHO) classification of head and neck tumours considers it to be malignant...
2017: Ecancermedicalscience
https://www.readbyqxmd.com/read/28885737/vascular-pattern-analysis-on-microvascular-sonography-for-differentiation-of-pleomorphic-adenomas-and-warthin-tumors-of-salivary-glands
#5
Inseon Ryoo, Sangil Suh, Young Hen Lee, Hyung Suk Seo, Hae Young Seol, Jeong-Soo Woo, Soo Chin Kim
OBJECTIVES: Pleomorphic adenomas and Warthin tumors are the most common salivary gland tumors. It is important to differentiate between them because at least a partial parotidectomy is necessary for pleomorphic adenomas, whereas enucleation is sufficient for Warthin tumors. This study aimed to evaluate the usefulness of vascular pattern analysis using microvascular sonography to differentiate between the tumors. METHODS: Sixty-two patients with pathologically proven pleomorphic adenomas (n = 38) and Warthin tumors (n = 24) were included...
September 8, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28863883/clinicopathologic-and-surgical-study-of-pleomorphic-adenoma-of-the-parotid-gland-analysis-of-risk-factors-for-recurrence-and-facial-nerve-dysfunction
#6
Carlos A Espinosa, Álvaro Fernández-Valle, Paloma Lequerica-Fernández, Lucas de Villalaín, Juan Carlos de Vicente
PURPOSE: To determine whether clinicopathologic or surgical features are risk factors for recurrence and facial nerve dysfunction in pleomorphic adenoma (PA) of the parotid gland. PATIENTS AND METHODS: The records of 198 patients surgically treated for a PA of the parotid gland from 1999 through 2013 were retrospectively reviewed to identify patients who developed a tumor recurrence. The Fisher exact test and Mann-Whitney U test were used to analyze patient characteristics between recurrent and non-recurrent PAs...
August 3, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28857999/transnasal-endoscopic-resection-of-a-pleomorphic-adenoma-originate-from-nasal-floor
#7
Yesun Cho, Yul Gyun Kim, Eunhye Shin, Boo-Young Kim
A 81-year-old female presented to our hospital frequent epistaxis. Nasal endoscopy showed a mass obstructing nasal cavity completely and occupying middle meatus. Magnetic resonance imaging was performed, an about 4.8 × 4 × 4.2 cm sized heterogeneous T2 high signal intensity and T1 enhancing mass mainly involving right nasal cavity with invasion of right hard palate with bony destruction. Therefore, the authors planned to do endoscopic mass excision, under general anesthesia for diagnosis and treatment...
August 28, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28844507/accuracy-of-fnac-and-ct-in-the-differentiation-of-benign-and-malignant-parotid-tumours-in-a-case-series
#8
Marina A Gavín-Clavero, Tomás Usón-Bouthelier, Úrsula M Jariod-Ferrer, Arancha Fernández-Larrañaga, Bianca Pantilie, Fernando Lobera-Molina, M Victoria Simón-Sanz, Bartolomé Nadal Cristóbal
INTRODUCTION: Parotid tumours, in addition to the wide variety of types, are histologically complex. Differentiating between benign and malignant tumours in preoperative diagnosis is important in deciding the type of surgery required. Fine needle aspiration cytology (FNAC) is a simple, quick, low-cost, low-invasive and well-tolerated tool used in the preoperative diagnosis of these tumours. MATERIAL AND METHODS: we calculated the sensitivity, specificity, predictive positive value (PPV) and negative predictive value (NPV) of FNAC and computed tomography (CT) in the differentiation of benign and malignant parotid tumours operated between 2010 to 2014 in the oral and maxillofacial surgery department of the University Hospital Miguel Servet...
August 24, 2017: Acta Otorrinolaringológica Española
https://www.readbyqxmd.com/read/28842747/increased-sox2-expression-in-salivary-gland-carcinoma-ex-pleomorphic-adenoma-progression-an-association-with-adverse-outcome
#9
Bruno Tavares Sedassari, Maria Fernanda Setúbal Destro Rodrigues, Thalita Santana Conceição, Fernanda Viviane Mariano, Venâncio Avancini Ferreira Alves, Fábio Daumas Nunes, Albina Altemani, Suzana Cantanhede Orsini Machado de Sousa
SOX2 is a regulatory factor of embryonic stem cells that has been implicated in carcinogenesis and cancer progression. We aimed to investigate the potential role of SOX2 in the stepwise progression from pleomorphic adenoma (PA) to invasive carcinoma ex pleomorphic adenoma (CXPA), evaluating its prognostic significance as well. Thirty PAs without malignant transformation and 25 CXPAs presenting both luminal or myoepithelial differentiation (7 intracapsular and 18 extracapsular) were evaluated immunohistochemically for SOX2 expression...
August 25, 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/28840842/chemokine-and-chemokine-receptor-patterns-in-patients-with-benign-and-malignant-salivary-gland-tumors-a-distinct-role-for-ccr7
#10
Mohammad Reza Haghshenas, Mohammad Javad Ashraf, Bijan Khademi, Abbas Ghaderi, Nasrollah Erfani, Mahboobeh Razmkhah
To explore the molecular mechanisms involved in pathophysiology of malignant and benign salivary gland tumors (SGTs), we investigated main tumor-inducing chemokines and chemokine receptors, CXCL12/CXCR4/ACKR3 (CXCR7), CXCR3/CXCL10, CCR5/CCL5, CCL21/CCR7, CCL2, CCR4, CXCR5, CCR6, and CXCL8 in tumor tissues. Parotid tissues were obtained from 30 patients with malignant and benign SGTs. Quantitative real-time polymerase chain reaction (qRT-PCR) was employed to determine the mRNA expression pattern of the mentioned chemokines/chemokine receptors and immunohistochemistry (IHC) was performed to verify the expression of CCR7...
March 1, 2017: European Cytokine Network
https://www.readbyqxmd.com/read/28838613/impact-of-dysfunction-of-the-facial-nerve-after-superficial-parotidectomy-a-prospective-study
#11
V E Prats-Golczer, E Gonzalez-Cardero, J A Exposito-Tirado, E Montes-Latorre, L M Gonzalez-Perez, P Infante-Cossio
To evaluate the impact of dysfunction of the facial nerve after superficial parotidectomy for pleomorphic adenoma of the superficial lobe, we prospectively analysed the data of 79 patients using the Facial Disability Index (FDI) and the Short-Form 36-Item (SF-36) questionnaires up to 12 months postoperatively. The function of the facial nerve was grading on the House-Brackmann Scale. Results at 1 week and 1, 3, 6, and 12 months were compared with preoperative (baseline) measurement. The maximum reduction in FDI scores coincided with the highest facial paresis values at one week...
August 21, 2017: British Journal of Oral & Maxillofacial Surgery
https://www.readbyqxmd.com/read/28832740/solitary-fibrous-tumor-of-the-lacrimal-gland-mimicking-pleomorphic-adenoma
#12
Eduardo Damous Feijó, Ana Carla de Souza Nery, Fábio Ramos Caiado, Roberto Murillo Limongi
Solitary fibrous tumor (SFT) is a rare mesenchymal spindle-cell neoplasm commonly found in the pleura; it is rare in the orbit and extremely rare in the lacrimal gland. We herein report a case of SFT of the lacrimal gland that mimicked a pleo morphic adenoma. We discuss the clinical, radiological, histopathological, and immunohistochemical findings that provided insight and rationale to accurately diagnose this case.
June 2017: Arquivos Brasileiros de Oftalmologia
https://www.readbyqxmd.com/read/28828496/impact-of-postoperative-radiotherapy-and-her2-new-overexpression-in-salivary-duct-carcinoma-a%C3%A2-monocentric-clinicopathologic-analysis
#13
Marlen Haderlein, Claudia Scherl, Sabine Semrau, Sebastian Lettmaier, Markus Hecht, Ramona Erber, Heinrich Iro, Rainer Fietkau, Abbas Agaimy
AIM: Retrospective Investigation of the prognostic relevance of clinicopathologic parameters in patients with salivary duct carcinoma (SDC). METHODS: An experienced pathologist reviewed 67 patients with de novo SDC or SDC ex pleomorphic adenoma. Paraffin-embedded tumor samples were examined by immunohistochemistry for expression of HER2/neu, androgen (AR), progesterone (PR), estrogen (ER), epidermal growth factor (EGFR) and programmed death ligand 1 (PD-L1-R) receptor...
August 21, 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/28819618/serum-levels-of-cyfra-21-in-patients-with-benign-and-malignant-salivary-gland-tumors
#14
Naghmeh Jeiroodi, Seyed Mohammad-Javad Aslani, Bijan Khademi, Mahyar Malekzadeh, Zohreh Jaafari-Ashkavandi
INTRODUCTION: Cyfra 21 is a serum-soluble fragment of cytokeratin19. Increased Cyfra 21 serum levels and their benefit as a tumor marker have been shown in some malignancies. This study aimed to evaluate the serum levels of Cyfra 21 in patients with benign and malignant salivary gland tumors. MATERIALS AND METHODS: In this cross-sectional study, the serum level of Cyfra 21 in 44 patients with malignant salivary gland tumors and 16 cases of pleomorphic adenoma were compared with 28 healthy controls using enzyme-linked immunosorbent assay (ELISA)...
July 2017: Iranian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28796899/plag1-immunohistochemistry-is-a-sensitive-marker-for-pleomorphic-adenoma-a-comparative-study-with-plag1-genetic-abnormalities
#15
Nora Katabi, Bin Xu, Achim A Jungbluth, Lei Zhang, Sung Yun Shao, Jason Lane, Ronald Ghossein, Cristina R Antonescu
AIMS: PLAG1 gene rearrangement is the most common genetic abnormality in pleomorphic adenoma (PA), resulting in overexpression of PLAG1 protein. PA and carcinoma ex pleomorphic adenoma (CA ex-PA) can mimic various benign and malignant salivary gland tumors. The aims of this study are to evaluate the sensitivity and specificity of PLAG1 immunohistochemistry (IHC) in the differential diagnosis of PA and CA ex-PA and to compare the PLAG1 immunohistochemical results to PLAG1 gene abnormalities as detected by fluorescence in situ hybridization (FISH)...
August 10, 2017: Histopathology
https://www.readbyqxmd.com/read/28772134/expression-of-c-x-c-motif-chemokine-receptors-4-and-7-in-salivary-gland-neoplasms
#16
Ekarat Phattarataratip, Kittipong Dhanuthai
OBJECTIVES: Chemokine receptors have been shown to overexpress in several cancer types. Binding of chemokines to their cognate chemokine receptors on tumor cells can promote tumor growth, angiogenesis and metastasis. The purposes of this study was to examine the expression of chemokine receptors, CXCR4 and CXCR7, in salivary gland neoplasms and its association with pathologic characteristics. DESIGN: Sixty-two cases of salivary gland neoplasms, including 25 mucoepidermoid carcinomas (MEC), 18 adenoid cystic carcinomas (ACC), 14 pleomorphic adenomas (PA) and 5 polymorphous low-grade adenocarcinoma (PLGA) were investigated for CXCR4 and CXCR7 expression immunohistochemically...
July 26, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28739497/salivary-gland-epithelial-neoplasms-in-pediatric-population-a-single-institute-experience-with-a-focus-on-the-histologic-spectrum-and-clinical-outcome
#17
Bin Xu, Amandeep Aneja, Ronald Ghossein, Nora Katabi
Salivary gland epithelial neoplasms are rare in children and adolescents with only a handful of large series have been published. A retrospective study was conducted for 57 cases in patients 20years or younger. The tumors were located in the parotid (n=36), submandibular gland (n=7), and minor salivary glands (n=14). 19 (33%) tumors were pleomorphic adenoma, while the remaining (67%) were malignant. The histologic types of carcinomas were mucoepidermoid carcinoma (MEC, n=19, 33%), acinic cell carcinoma (n=7, 12%), adenoid cystic carcinoma (n=6, 11%), secretory carcinoma (mammary analogue) (SC, n=4, 7%), and myoepithelial carcinoma (n=2, 4%)...
July 21, 2017: Human Pathology
https://www.readbyqxmd.com/read/28713752/largest-de-novo-parapharyngeal-pleomorphic-adenoma-a-rare-case-removed-via-minimal-access-approach
#18
Vikas Malhotra, Nikhil Arora, Varun Rai
Parapharyngeal tumors are relatively rare tumors of head and neck. In general, pleomorphic adenoma is one of the most common benign tumor of the parapharyngeal region. Various approaches have been described in the literature for removal of parapharyngeal tumor with mandibulotomy generally carried out for large tumors. Here, we describe removal of a large parapharyngeal pleomorphic adenoma transcervically without mandibulotomy which subsequently turned out to be one of the largest ever reported in the literature and describe how large tumors of parapharyngeal can be removed with minimal invasive approach with mandibulotomy kept as a backup thereby avoiding complications associated with mandibulotomy...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28713740/the-effects-of-platelet-rich-fibrin-membrane-on-secondary-healing-after-pleomorphic-adenoma-excision-in-the-hard-palate-a-preliminary-study
#19
Özer Erdem Gür, Nuray Ensari, Nevreste Didem Sonbay Yılmaz
AIM: This study aims to evaluate the effects of platelet-rich fibrin (PRF) membrane on secondary healing after pleomorphic adenoma (PA) excision in the hard palate. MATERIALS AND METHODS: PRF membranes were laid over mucosal defects which occurred following PA excision in the hard palate. The secondary healing process was monitored in the patients by follow-up examinations on postoperative days 5, 10, 15, 20, 25, 30, 35, and 40. RESULTS: In this preliminary study, epithelialization was observed to have completed on the 30(th) day of follow-up in the first patient and on the 35(th) day in the second and third patients...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28706261/plag1-deficiency-impairs-spermatogenesis-and-sperm-motility-in-mice
#20
Almas R Juma, Sylvia V H Grommen, Moira K O'Bryan, Anne E O'Connor, D Jo Merriner, Nathan E Hall, Stephen R Doyle, Pauliina E Damdimopoulou, Daniel Barriga, Adam H Hart, Wim J M Van de Ven, Bert De Groef
Deficiency in pleomorphic adenoma gene 1 (PLAG1) leads to reduced fertility in male mice, but the mechanism by which PLAG1 contributes to reproduction is unknown. To investigate the involvement of PLAG1 in testicular function, we determined (i) the spatial distribution of PLAG1 in the testis using X-gal staining; (ii) transcriptomic consequences of PLAG1 deficiency in knock-out and heterozygous mice compared to wild-type mice using RNA-seq; and (iii) morphological and functional consequences of PLAG1 deficiency by determining testicular histology, daily sperm production and sperm motility in knock-out and wild-type mice...
July 13, 2017: Scientific Reports
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