Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Adenoid Cystic Carcinoma of Parotid Salivary Gland—A Case Study  [PDF]
Shuaib Kayode Aremu
Case Reports in Clinical Medicine (CRCM) , 2018, DOI: 10.4236/crcm.2018.711052
Abstract: Adenoid Cystic Carcinoma (ACC) is an infrequent slow growing epithelial tumour constituting for around less than 1% of all the oral and maxillo-facial malignancies and almost 10% of all the salivary gland tumors. Parotid gland is the second most common site to be involved in the head and neck region along with submandibular gland, Palate being the most common site involved in the oral cavity. Key feature of these tumors include its asymptomatic presentation, indolent nature, typically showing infiltrative growth and peri-neural invasion. Herein, we report a case of adenoid cystic carcinoma of right parotid gland of a 33-year-old male who presented with complaint of painless slow enlargement of left parotid gland and facial muscle weakness. On Examination firm mass in the region of the left parotid gland as well as left facial paralysis was seen. Biopsy results and further management is discussed here within.
Management of salivary gland adenoid cystic carcinoma: institutional experience of a case series
Tincani, Alfio José;Del Negro, André;Araújo, Priscila Pereira Costa;Akashi, Hugo Kenzo;Martins, Antonio Santos;Altemani, Albina Milani;Barreto, Gilson;
Sao Paulo Medical Journal , 2006, DOI: 10.1590/S1516-31802006000100006
Abstract: context and objective: salivary gland tumor management requires long-term follow-up because of tumor indolence and possible late recurrence and distant metastasis. adenoid cystic carcinoma (acc) accounts for 10-15% of such tumors. the aim here was to evaluate surgical and clinical management, staging and follow-up of acc patients in one academic institution. design and setting: retrospective study at head and neck service, universidade estadual de campinas. methods: data on 21 patients treated between 1993 and 2003 were reviewed. management utilized clinical staging, histology and imaging. major salivary gland tumor extent was routinely assessed by preoperative ultrasonography. diagnosis, surgery type, margin type (negative/positive), postoperative radiotherapy and recurrence (presence/absence) were evaluated. results: there were eleven major salivary gland tumors (52.3%), seven submandibular and four parotid. ten patients (47.7%) had minor salivary gland acc (all in palate), while the submandibular was the most frequently affected major one. diagnoses were mostly via fine-needle aspiration (fna) and incision biopsy. frozen sections were used for six patients. there was good ultrasound/fna correlation. sixteen (76%) had postoperative radiotherapy. one (4.7%) died from acc and five now have recurrent disease: three (14.2%) locoregional and two (9.5%) distant metastases. conclusion: adenoid cystic carcinoma has locally aggressive behavior. in 21 cases, of acc, the facial nerve was preserved in all except in the few with gross tumor involvement. treatment was defined from physical examination, imaging, staging and histology.
Salivary Gland Tumors in Maxillofacial Region: A Retrospective Study of 130 Cases in a Southern Iranian Population  [PDF]
Mahmoud Shishegar,Mohamad J. Ashraf,Negar Azarpira,Bijan Khademi,Basir Hashemi,Amir Ashrafi
Pathology Research International , 2011, DOI: 10.4061/2011/934350
Abstract: Tumors of the salivary glands are uncommon head and neck neoplasia. We conducted a retrospective study of 392 cases over the last 6 years in Shiraz, south of Iran, to investigate the clinicopathological features of these tumors in Iranian population. The age of the patients ranged from 8 to 85 years, with the mean age years and male-to-female (M?:?F) ratio was 1.02?:?1. For benign tumors, there was a propensity towards females, whereas the malignant tumor was more common in males. The ratio of benign tumors to malignancies was 2.19?:?1. Pleomorphic adenoma (PA) was the most common tumor and accounted for 85% of all benign tumors, followed by Warthin's tumor (8.6%). Of the 125 malignancies, adenoid cystic carcinoma (40%), mucoepidermoid carcinoma (24%) and invasive squamous cell carcinoma (16%) were the most common histological types. Most of the salivary gland tumors (75%) originated from major salivary glands and the remained (25%) originated from minor glands. The parotid gland was the most common site both in benign and malignant tumors. Most of our findings were similar to those in the literature, with some variations. The salivary tumors slightly predominated in males. Adenoid cystic carcinoma and mucoepidermoid carcinoma constituted the most common malignancies. 1. Introduction Salivary gland tissues are diffusely distributed in the upper aerodigestive tract. The parotid, submandibular, and sublingual glands are the major salivary glands. Minor salivary glands are present in many sites, such as the lips, gingiva, cheek, palate, tongue, oropharynx, paranasal sinuses, and parapharyngeal space. Salivary gland tumors are relatively uncommon lesions accounting for 3–6% of all head and neck neoplasms [1]. The global incidence of these tumors is 0.4–13.5 per 100,000 persons annually [2–4]. These neoplasms composed heterogeneous groups of tumors with variable histological pictures. The site, patient age, and sex distributions of different types of salivary gland neoplasms vary with race and geographic location. The incidence of these tumors is different in between geographic areas and ethnic groups [2, 3, 5]. In the English literature, there is little report [1] on salivary gland tumors in Iranian population. The aim of this study was to analyze the relative frequency, location, patient sex, and age of salivary gland tumors in the southern Iranian population over the last 6 years. 2. Material and Methods This study included patients with primary epithelial salivary gland neoplasms between 2004 to 2009, who underwent operations in the Department of
Mitochondrial Mutations in Adenoid Cystic Carcinoma of the Salivary Glands  [PDF]
Suhail K. Mithani,Chunbo Shao,Marietta Tan,Ian M. Smith,Joseph A. Califano,Adel K. El-Naggar,Patrick K. Ha
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0008493
Abstract: The MitoChip v2.0 resequencing array is an array-based technique allowing for accurate and complete sequencing of the mitochondrial genome. No studies have investigated mitochondrial mutation in salivary gland adenoid cystic carcinomas.
Suprabasin Is Hypomethylated and Associated with Metastasis in Salivary Adenoid Cystic Carcinoma  [PDF]
Chunbo Shao,Marietta Tan,Justin A. Bishop,Jia Liu,Weiliang Bai,Daria A. Gaykalova,Takenori Ogawa,Ami R. Vikani,Yuri Agrawal,Ryan J. Li,Myoung Sook Kim,William H. Westra,David Sidransky,Joseph A. Califano,Patrick K. Ha
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0048582
Abstract: Salivary gland adenoid cystic carcinoma (ACC) is a rare cancer, accounting for only 1% of all head and neck malignancies. ACC is well known for perineural invasion and distant metastasis, but its underlying molecular mechanisms of carcinogenesis are still unclear.
In vitro angiogenesis and expression of nuclear factor κB and VEGF in high and low metastasis cell lines of salivary gland Adenoid Cystic Carcinoma
Jiali Zhang, Bin Peng
BMC Cancer , 2007, DOI: 10.1186/1471-2407-7-95
Abstract: Electrophoretic mobility shift assay was used to detect nuclear factor κappa B activity. Semi-quantitative RT-PCR was used to quantify the mRNA level of VEGF. Immuofluorescence double staining and semi-quantitative confocal laser scanning analysis was carried out to detect nuclear factor κappa B nuclear localization and staining intensity of VEGF. The angiogenesis ability of ACC-M and ACC-2 was compared by an in vitro three-dimensional angiogenic model assay. The vector transfection assay was performed to transfect the PCMV-IκBαM vector into ACCs cell lines expressing the phosphorylation defective IκBαM.Nuclear factor κappa B activity and the rate of nuclear factor κappa B nuclear localization in ACC-M was significantly higher than that in ACC-2. Moreover, ACC-M exhibited higher mRNA and protein levels of vascular endothelial growth factor than ACC-2. VEGF mRNA expression was effectively decreased by inhibition of nuclear factor κappa B activity. Furthermore, ACC-M could remarkably stimulate the migration and tube formation of endothelial cells and induce The umbilical vein endothelial cells sprouting into the gel matrix.These results implicated that ACCs cells with higher metastasis feature might present greater angiogenesis ability.Adenoid cystic carcinoma of salivary glands (ACCs) is a high malignant carcinoma characterized by intensive local invasion and insidious distant metastasis to the lung at an early stage, which is responsible for a poor long-term survival rate [1]. Although reasons of the invasiveness and aggressive metastatic dissemination of ACCs remain unclear, angiogenesis might be a possible involving mechanism [2]. Our previous study showed that the ACCs histological type which presented high metastasis tendency exhibited higher microvessel density levels and more intensive expression of angiogenic related factors [3].Angiogenesis, the development of new blood vessels from the pre-existing vascular beds, is an essential pathophysiologic event occur
Prognostic value of expression of molecular markers in adenoid cystic cancer of the salivary glands compared with lymph node metastasis: a retrospective study  [cached]
Lee Seok Ki,Kwon Min Su,Lee Yoon Se,Choi Seung-Ho
World Journal of Surgical Oncology , 2012, DOI: 10.1186/1477-7819-10-266
Abstract: Background Adenoid cystic cancer arising in the salivary glands has distinctive features such as perineural invasion, distant metastasis, and a variable prognosis. In salivary gland cancer, c-kit, EGFR, and VEGF are representative molecular markers that may predict remnant and recurrent tumors. In this study, the expression of c-kit, EGFR, and VEGF in adenoid cystic cancer was evaluated, and the relationships between the expression of these markers and the clinical findings were investigated. Methods The medical records of 48 patients who were treated for parotid adenoid cystic cancer from January 1990 to January 2006 were reviewed. The tumor location, size, histological subtypes, perineural invasion, the resected margin status, and lymph node metastasis were assessed. Immunohistochemical staining and semiquantitative analysis of c-kit, EGFR and VEGF were performed. The relationship between the expression of each marker and the clinicopathological factors were analyzed. Results Positive c-kit immunostaining was present in 45 patients (94%), with weak positivity (+1) in 23, moderate positivity (+2) in 19 and strong positivity (+3) in three. Positive EGFR immunostaining was observed in 27 (56%), with weak positivity (+1) in 19 and moderate positivity (+2) in eight with no strong positive staining. Positive VEGF immunostaining was present in 42 patients (88%) with weak positivity (+1) in 12, moderate positivity (+2) in 17, and strong positivity (+3) in 13. Only the expression of VEGF was significantly higher in parotid gland tumors than in any other gland (P = 0.032). Marginal involvement was associated with strong VEGF expression (P = 0.02). No marker was significantly correlated with recurrence or the survival rate. Lymph node status was related to the survival rate. Conclusions The expression of c-kit, EGRF, and VEGF had no predictive value for recurrence or the prognosis of adenoid cystic cancer. Only the lymph node status was related to the prognosis.
Lacrimal gland adenoid cystic carcinoma treated with intraarterial chemotherapy
Bülent KARAG?Z,O?uz B?LG?,Cengiz DUMAN,??nar BA?EK?M
Turkish Journal of Oncology , 2009,
Abstract: Adenoid cystic carcinoma is a malignant tumor of glandular tissue and progresses with local relapse and distant metastasis. In this report, we present a case of lacrimal gland adenoid cystic carcinoma who treated by multimodal approach with intraarterial chemotherapy. A 32-year-old woman was diagnosed with adenoid cystic carcinoma (solid variant) of the left lacrimal gland. Neoadjuvant intraarterial cisplatin, intravenous doxorubicin, and orbital exenteration were performed. The patient was followed for 32 months without relapse. Achievement of long-time survival for this disease supports studies that show benefit of intraarterial chemotherapy.
Pulmonary adenoid cystic carcinoma : An unusual presentation
Dixit Ramakant,Nuval Paras
Lung India , 2007,
Abstract: Adenoid cystic carcinoma is a rare but distinctive salivary gland type malignant neoplasm that arises infrequently in the respiratory tract, where it is largely seen in the trachea or large airways. A 29-year-old female who presented with a peripheral lung mass due to pulmonary adenoid cystic carcinoma is reported in view of its unusual location, early age of presentation and lack of such reports in the recent literature. Lung India 2007; 24 : 28-29
MicroRNA Profiling of Salivary Adenoid Cystic Carcinoma: Association of miR-17-92 Upregulation with Poor Outcome  [PDF]
Yoshitsugu Mitani, Dianna B. Roberts, Hanadi Fatani, Randal S. Weber, Merrill S. Kies, Scott M. Lippman, Adel K. El-Naggar
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0066778
Abstract: Background Salivary adenoid cystic carcinoma (ACC) is a rare relentlessly progressive malignant tumor. The molecular events associated with ACC tumorigenesis are poorly understood. Variable microRNAs (miRNA) have been correlated with tumorigenesis of several solid tumors but not in ACC. To investigate the association of miRNAs with the development and/or progression of ACC, we performed a comparative analysis of primary ACC specimens and matched normal samples and a pooled salivary gland standard and correlated the results with clinicopathologic factors and validated selected miRNAs in a separate set of 30 tumors. Methods MiRNA array platform was used for the identification of target miRNAs and the data was subjected to informatics and statistical interrelations. The results were also collected with the MYB-NFIB fusion status and the clinicopathologic features. Results Differentially dysregulated miRNAs in ACC were characterized in comparison to normal expression. No significant differences in miRNA expression were found between the MYB-NFIB fusion positive and -negative ACCs. Of the highly dysregulated miRNA in ACC, overexpression of the miR-17 and miR-20a were significantly associated with poor outcome in the screening and validation sets. Conclusion Our study indicates that the upregulation of miR-17-92 may play a role in the biology of ACC and could be potentially targeted in future therapeutic studies.
Page 1 /100
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.