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Oral premalignant

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https://www.readbyqxmd.com/read/29328891/dysplasia-should-not-be-ignored-in-lichenoid-mucositis
#1
L D Rock, D M Laronde, I Lin, M P Rosin, B Chan, B Shariati, L Zhang
Oral lichen planus is categorized as a potentially malignant condition by the World Health Organization; however, some argue that only lichen planus with dysplasia have malignant potential. Many pathologists call lichen planus with dysplasia "dysplasia with lichenoid mucositis (LM)" or "LM with dysplasia." Previous research has shown that certain high-risk patterns of loss of heterozygosity (LOH) in dysplastic lesions are associated with significantly increased cancer risk. However, LM without dysplasia lacks such molecular patterns, supporting the hypothesis that LM, by itself, is not potentially malignant and that only those with dysplasia have malignant potential...
January 1, 2018: Journal of Dental Research
https://www.readbyqxmd.com/read/29323056/role-of-salivary-biomarkers-in-early-detection-of-oral-squamous-cell-carcinoma
#2
Nidhi Awasthi
INTRODUCTION: Oral cancer is prevalent worldwide and is a common cause of morbidity and mortality. Despite advances in treatment, the survival of patients with oral cancer has not significantly improved over the past several decades owing to late detection and treatment failures. The present study was undertaken with an objective to explore the role of salivary CYFRA 21-1, CA 19-9, lactate dehydrogenase (LDH), total proteins, and amylase as biochemical markers of oral squamous cell carcinoma (OSCC) and premalignant lesions (PML)...
October 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/29288692/intraepithelial-cd8-lymphocytes-as-a-predictive-diagnostic-biomarker-for-the-remission-of-oral-lichen-planus
#3
Ai Enomoto, Eiichi Sato, Takashi Yasuda, Tatsuya Isomura, Toshitaka Nagao, Daichi Chikazu
Oral lichen planus (OLP) is an autoimmune inflammatory disease of the oral mucosa whose etiology remains unknown. Moreover, the possibility of OLP being a premalignant change is under debate. Various types of immune cells infiltrate the OLP lesion and affect its clinicopathological features. However, the diversity of infiltrating immune cells has not been fully clarified in relation to OLP diagnosis. In this study, we quantitatively examined CD8 (+) lymphocyte infiltration by immunohistochemistry, which is the principal effector of cytotoxic immune reaction in 123 cases of OLP specimens...
December 27, 2017: Human Pathology
https://www.readbyqxmd.com/read/29276184/evaluation-of-the-mirna-146a-and-mirna-155-expression-levels-in-patients-with-oral-lichen-planus
#4
Fatemeh Ahmadi-Motamayel, Zeynab Bayat, Mehrdad Hajilooi, Soroosh Shahryar-Hesami, Ali Mahdavinezhad, Lida Samie, Ghasem Solgi
BACKGROUND: Oral Lichen Planus (OLP) is a chronic autoimmune disease that could be considered as a potential premalignant status. OBJECTIVE: To evaluate the miRNA-146a and miRNA-155 expression levels in patients with oral Lichen planus lesions compared to healthy subjects with normal oral mucosa. METHODS: Forty patients with oral lichen planus and 18 healthy age and gender-matched controls were recruited in this case-control study. Oral lichen planus was diagnosed clinically and pathologically...
December 2017: Iranian Journal of Immunology: IJI
https://www.readbyqxmd.com/read/29237960/spritzer-for-diagnostic-cytopathology
#5
Rashmi Metgud, Smitha Naik, Shrikant Patel
BACKGROUND: Exfoliative cytology is an easy, economical, noninvasive, and feasible method for early detection and screening program of any premalignant or malignant lesion. In case of routine cytological procedure, classical Papanicolaou (PAP) stain is widely used while Romanowsky stains are sparingly used. Leishman-Giemsa (LG) cocktail, being a easier, cost effective staining technique, has not been used in exfoliative cytology. Therefore, this pilot study was carried out to compare and contrast the role of LG stain in routine cytological procedure which is very cost-effective, less time-consuming and requires less infrastructural support...
October 2017: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/29188097/noninvasive-structural-and-microvascular-anatomy-of-oral-mucosae-using-handheld-optical-coherence-tomography
#6
Meng-Tsan Tsai, Yingdan Chen, Cheng-Yu Lee, Bo-Huei Huang, Nguyen Hoang Trung, Ya-Ju Lee, Yen-Li Wang
In this study, we demonstrated the feasibility of using a handheld optical coherence tomography (OCT) for in vivo visualizations of the microstructural and microvascular features of various oral mucosal types. To scan arbitrary locations of the oral mucosa, a scanning probe was developed, composed of a probe body fabricated by a 3D printer, miniaturized two-axis galvanometer, relay lenses, and reflective prism. With a 3D printing technique, the probe weight and the system volume were greatly reduced, enabling the effective improvement of imaging artifacts from unconscious motion and system complexity...
November 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/29161776/awareness-on-cytology-procedure-in-oral-cancer-detection-among-undergraduates-an-institutional-study
#7
Gayathri Ramesh, Rajeev Pathak, Sunita Pathak, Amrita Raj, Amit Kumar, Anuradha Katiyar
Background: The screening and the early detection of the premalignant and malignant lesions are the only means for controlling the oral cancer which is known to be one of the leading causes for mortality worldwide. Oral exfoliative cytology though not a substitute for biopsy can be a powerful tool for its early detection. Dental Surgeons can play a great role in this direction. Aims and Objectives: The present study was undertaken to assess the self-reported knowledge and attitude regarding the early detection of oral cancer and exfoliative cytology among the undergraduates of Rama Dental College, Kanpur...
November 2017: Journal of Experimental Therapeutics & Oncology
https://www.readbyqxmd.com/read/29148069/long-term-oral-exposure-to-safe-dose-of-bisphenol-a-in-association-with-high-fat-diet-stimulate-the-prostatic-lesions-in-a-rodent-model-for-prostate-cancer
#8
Camila H Facina, Silvana G P Campos, Bianca F Gonçalves, Rejane M Góes, Patricia S L Vilamaior, Sebastião R Taboga
BACKGROUND: Studies have shown that exposure to environmental chemicals known as endocrine disruptors can cause permanent changes in genital organs, such as the prostate. Among these environmental chemicals stands out bisphenol A (BPA). Another factor associated with prostate changes is the consumption of a high-fat diet. Although the relationship between the consumption of a high-fat diet and an increased risk of prostate cancer is well established, the mechanisms that lead to the establishment of this disease are not completely understood, nor the simultaneous action of BPA and high-fat diet...
November 17, 2017: Prostate
https://www.readbyqxmd.com/read/29139244/raman-exfoliative-cytology-for-oral-precancer-diagnosis
#9
Aditi Sahu, Poonam Gera, Venkatesh Pai, Abhishek Dubey, Gunjan Tyagi, Mandavi Waghmare, Sandeep Pagare, Manoj Mahimkar, C Murali Krishna
Oral premalignant lesions (OPLs) such as leukoplakia, erythroplakia, and oral submucous fibrosis, often precede oral cancer. Screening and management of these premalignant conditions can improve prognosis. Raman spectroscopy has previously demonstrated potential in the diagnosis of oral premalignant conditions (in vivo), detected viral infection, and identified cancer in both oral and cervical exfoliated cells (ex vivo). The potential of Raman exfoliative cytology (REC) in identifying premalignant conditions was investigated...
November 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29138137/the-next-frontier-head-and-neck-cancer-immunoprevention
#10
J Silvio Gutkind, Jack D Bui
Restoring T cell-mediated antitumor immunity by targeting immune checkpoint inhibitors in head and neck squamous cell carcinoma (HNSCC) results in immunomodulation and durable remissions. However, the overall response rate to these immunotherapies in HNSCC is only approximately 20%. This raises the possibility that immunologic intervention earlier in the HNSCC continuum, such as in oral premalignant lesions (OPL) could elicit an increased therapeutic response. New experimental studies suggest that immune therapies can be used for HNSCC prevention rather than therapy...
November 14, 2017: Cancer Prevention Research
https://www.readbyqxmd.com/read/29135982/sting-expression-and-response-to-treatment-with-sting-ligands-in-premalignant-and-malignant-disease
#11
Jason R Baird, Zipeng Feng, Hong D Xiao, David Friedman, Ben Cottam, Bernard A Fox, Gwen Kramer, Rom S Leidner, R Bryan Bell, Kristina H Young, Marka R Crittenden, Michael J Gough
Human papilloma virus positive (HPV+) tumors represent a large proportion of anal, vulvar, vaginal, cervical and head and neck squamous carcinomas (HNSCC) and late stage invasive disease is thought to originate from a premalignant state. Cyclic dinucleotides that activate STimulator of INterferon Genes (STING) have been shown to cause rapid regression of a range of advanced tumors. We aimed to investigate STING ligands as a novel treatment for papilloma. We tested therapies in a spontaneous mouse model of papilloma of the face and anogenital region that histologically resembles human HPV-associated papilloma...
2017: PloS One
https://www.readbyqxmd.com/read/29126494/adjunctive-diagnostic-techniques-for-oral-and-oropharyngeal-cancer-discovery
#12
REVIEW
Michaell A Huber
The most important prognostic factor in predicting the outcome of oral and oropharyngeal cancer (OPC) is the stage at which it is diagnosed. Only 30% of patients are diagnosed with early-stage disease. The oral health care provider performs an important role in early diagnosis of oral cancer. The conventional oral examination consists of a visual and tactile assessment of accessible oral, and head and neck structures. Any suspicious or equivocal lesion should be reevaluated within 4 weeks. Evidence supporting the use of adjunctive devices to improve the ability to screen for and identify OPCs and oral premalignant lesions remains low...
January 2018: Dental Clinics of North America
https://www.readbyqxmd.com/read/29123408/the-matrix-metalloproteinase-and-insulin-like-growth-factor-system-in-oral-cancer-a-prospective-clinical-study
#13
Eik Schiegnitz, Peer W Kämmerer, Holger Schön, Christoph Gülle, Manfred Berres, Keyvan Sagheb, Bilal Al-Nawas
Aim: The absence of reliable single serum biomarkers for oral premalignant lesion (OPL) and oral squamous cell carcinoma (OSCC) limits early diagnosis, monitoring of advanced disease, and prediction of prognosis. Methods: In this prospective study, serum levels of matrix metalloproteinase (MMP)-2, MMP-3, MMP-13, insulin-like growth factor (IGF)-1, and IGF-binding protein (IGFBP)-3 were measured in 81 untreated OSCC patients, 49 healthy subjects, and 75 individuals with OPLs, and correlated with clinicopathological parameters...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29109745/evaluation-of-myofibroblasts-in-oral-submucous-fibrosis-and-oral-squamous-cell-carcinoma-the-pathogenesis-and-correlation
#14
Piyush Gandhi, Umesh Chandra Prasad
Background: Oral submucous fibrosis (OSMF) is a chronic debilitating disease of the oral cavity having premalignant potential and unclear pathogenesis. Recently, myofibroblast has been postulated to play an important role in its pathogenesis and in the process of carcinogenesis. The purpose of this study was to evaluate and compare the presence of myofibroblasts in normal mucosa, different grades of OSMF, and oral squamous cell carcinoma (OSCC). Materials and Methods: The present in vitro cross-sectional descriptive study sample consisted of three groups, including 40 OSCCs, 40 OSMF, and 10 sections of normal oral epithelium taken as control group...
September 2017: Dental Research Journal
https://www.readbyqxmd.com/read/29097794/oral-leukoplakia-and-proliferative-verrucous-leukoplakia-a-review-for-dental-practitioners
#15
K Staines, H Rogers
Objectives To provide an overview of the current thinking in terms of the diagnosis and management of oral leukoplakia and proliferative verrucous leukoplakia as relevant to general dental practitioners.Data sources, data selection, data extraction, data synthesis We searched the MEDLINE Ovid, EMBASE databases and the Cochrane Library, (1990 to 16 April 2017), restricting our search to English language with the following key words: leukoplakia, white patch, proliferative verrucous leukoplakia, precancerous lesion, premalignant lesions, potentially malignant oral conditions and potentially malignant oral disorders...
December 2017: British Dental Journal
https://www.readbyqxmd.com/read/29079347/the-diagnostic-value-of-the-native-fluorescence-visualization-device-for-early-detection-of-premalignant-malignant-lesions-of-the-oral-cavity
#16
Maryam Amirchaghmaghi, Nooshin Mohtasham, Zahra Delavarian, Mohammad Taghi Shakeri, Masoud Hatami, Pegah Mosannen Mozafari
PURPOSE: The present study aimed to determine the diagnostic value of a native fluorescence visualization device in the identification of oral malignant/dysplastic lesions. METHODS: This study involved 45 patients who had oral lesions that were suspected to be malignant, potentially malignant, or benign. The patients visited the Oral Medicine Department of the Mashhad Dental School. The sensitivity, specificity, positive and negative predictive values, and likelihood ratio of this device were determined...
October 24, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29073177/hypomethylated-fgf3-is-a-potential-biomarker-for-early-detection-of-oral-cancer-in-mice-treated-with-the-tobacco-carcinogen-dibenzo-def-p-chrysene
#17
Yuan-Wan Sun, Kun-Ming Chen, Yuka Imamura Kawasawa, Anna C Salzberg, Timothy K Cooper, Carla Caruso, Cesar Aliaga, Junjia Zhu, Krishne Gowda, Shantu Amin, Karam El-Bayoumy
Genetic and epigenetic alterations observed at end stage OSCC formation could be considered as a consequence of cancer development and thus changes in normal or premalignant tissues which had been exposed to oral carcinogens such as Dibenzo[def,p]chrysene (DBP) may better serve as predictive biomarkers of disease development. Many types of DNA damage can induce epigenetic changes which can occur early and in the absence of evident morphological abnormalities. Therefore we used ERRBS to generate genome-scale, single-base resolution DNA methylomes from histologically normal oral tissues of mice treated with DBP under experimental conditions known to induce maximum DNA damage which is essential for the development of OSCC induced by DBP in mice...
2017: PloS One
https://www.readbyqxmd.com/read/29039225/toxicological-impact-of-waterpipe-smoking-and-flavorings-in-the-oral-cavity-and-respiratory-system
#18
Fawad Javed, Shatha Subhi ALHarthi, Munerah Saleh BinShabaib, Sangeeta Gajendra, Georgios E Romanos, Irfan Rahman
Waterpipe smoking (WS), an emerging trend has major health concerns. It is prevalent worldwide as a recreational activity both indoors and outdoors. The aim of this review was to assess the impact of waterpipe smoke on the oral and respiratory system (oral cavity and pulmonary tissues). A number of studies have shown that periodontal health status is compromised in waterpipe smokers when compared with nonsmokers. Some studies have associated WS with oral premalignant and malignant lesions; however, due to the poor quality of these studies, the presented outcomes should be interpreted with caution...
August 2017: Inhalation Toxicology
https://www.readbyqxmd.com/read/29034442/correlation-between-tissue-expression-of-microrna-137-and-cd8-in-oral-lichen-planus
#19
Sana Maher Hasan Aghbari, Abdelrahman Ibrahim Abushouk, Olfat Gamil Shakir, Shaimaa Omar Zayed, Attia Attia
OBJECTIVES: Oral lichen planus (OLP) is a chronic, inflammatory condition, classified by the World Health Organization as a premalignant lesion. We performed this study to evaluate the correlation between microRNA-137 (miR-137) and CD8 oral tissue expression in OLP patients. MATERIALS AND METHODS: Twenty OLP patients [classified into three groups: (a) papular, reticular, or plaque; (b) atrophic; and (c) erosive] and 20 healthy controls were subjected to biopsy of the oral mucosa...
October 15, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29018057/pd-1-blockade-prevents-the-development-and-progression-of-carcinogen-induced-oral-premalignant-lesions
#20
Jin Wang, Tongxin Xie, Bingbing Wang, William N William, John V Heymach, Adel K El-Naggar, Jeffrey N Myers, Carlos Caulin
Oral squamous cell carcinoma (OSCC) is preceded by progressive oral premalignant lesions (OPL). Therefore, therapeutic strategies that prevent malignant progression of OPLs are expected to reduce the incidence of OSCC development. Immune checkpoint inhibitors that target the interaction of programmed death receptor 1 (PD-1) on T cells with the PD-1 ligand PD-L1 on cancer cells have been shown to extend the survival of patients with advanced OSCC. Here, we used the 4-nitroquinoline-1-oxide (4-NQO) mouse model of oral carcinogenesis to test the hypothesis that PD-1 blockade may control the progression of OPLs...
October 10, 2017: Cancer Prevention Research
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