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Head and neck squamous cell carcinomas (HNSCCs) most commonly develop in older patients (≥60 years of age) with a history of tobacco and alcohol use. However, young individuals (≥45 years of age) can also develop HNSCC, often without common risk factors. Increasing evidence shows that Human Papillomavirus (HPV) infection is associated with particular HNSCC sites (e.g. oropharynx). We assessed the Roche Linear Array HPV Genotyping Test in several lesions and then examined the prevalence of HPV in HNSCCs from young and older patients. HPV infection was most prevalent in oropharyngeal cancers (16/22, 73%), rarely found in oral cavity cancers (2/53, 4%), and other head and neck sites (1/17, 6%). HPV positive tumors were associated with patients that were >40 and 60 years old (p=0.02).The absence or shortened time of carcinogen exposure from common risk factors and the development of oral squamous cell carcinoma (OSCC) at an early age suggest aberrant genetic events that are different than those in OSSCs from older patients. We used Affymetrix SNP 6.0 arrays to genomically profile oral tumors from young and older patients. Tumors from young patients showed different regions/genes of copy number alterations than those from older patient tumors. An increase of regions of loss of heterozygosity (LOH) in tumors from older patients was observed, and there was a high prevalence of copy number neutral LOH on chromosome 9 in tumors from young and older patients. These data suggest different genetic mechanisms in these patient groups.We have previously shown that HNSCCs from younger patients exhibited a high incidence of microsatellite instability (MSI), a marker of defective mismatch repair (MMR). Deregulated mRNA levels of hPMS1, hPMS2 and hMLH1 were observed and absent/low expression of hPMS1, hPMS2 and hMLH1 protein levels were observed in 50% of OSCCs. No mutations were observed in hPMS1 and hPMS2 and no significant differences of MSI or LOH were observed across genomic loci between tumors of young and older patients. The role of these genetic mechanisms in oral cancer appears complex; studies such as ours should further improve our knowledge of the molecular mechanisms leading to early-onset oral carcinomas.
Academic dissertation for obtaining the degree of doctor by the University of Amsterdam under the authority of Rector Magnificus prof. mr. P.F. van der Heijden in the presence of the regular promotion committee to defend in public in the Auditorium of the University on thursday 2 december 2004, at 10:30 hour with Volkert Boudewijn Wreesmann born in Rotterdam and at 11:30 hours with Bhuvanesh Singh born in Patna (India).
A working group of sixteen experts from seven countries re-evaluated the evidence of the carcinogenicity of betel-quid and areca-nut chewing and some areca-nut related nitrosamines. Betel-quid and areca-nut chewing are widely practised in many parts of Asia and in Asian-migrant communities elsewhere in the world. There are hundreds of millions of users worldwide. They evaluated betel quid with tobacco as carcinogenic to humans (Group 1) on the basis of sufficient evidence of an increased risk of cancer of the oral cavity, pharynx and oesophagus. The working group reviewed epidemiological studies of human cancer, mainly studies from India, Pakistan and Taiwan (China). Studies on betel quid with tobacco and areca nut with tobacco in experimental animals now also provide sufficient evidence of carcinogenicity. The working group also evaluated betel quid without tobacco as carcinogenic to humans (Group 1), on the basis of sufficient evidence of an increased risk of oral cancer. Studies on betel quid without tobacco and areca nut without tobacco in experimental animals now also provide sufficient evidence of carcinogenicity. Areca nut, a common ingredient of betel quid and many different chewing preparations, including those available commercially, has been observed to cause oral submucous fibrosis
-Richly illustrated; 109 illustrations, 57 in color -Cover a wide range of diagnostic and theraputic techniques, i.e. MRI, PET, surgical treatment, radiation therapy
The American Joint Committee on Cancer's Cancer Staging Manual is used by physicians throughout the world to diagnose cancer and determine the extent to which cancer has progressed. All of the TNM staging information included in this Sixth Edition is uniform between the AJCC (American Joint Committee on Cancer) and the UICC (International Union Against Cancer). In addition to the information found in the Handbook, the Manual provides standardized data forms for each anatomic site, which can be utilized as permanent patient records, enabling clinicians and cancer research scientists to maintain consistency in evaluating the efficacy of diagnosis and treatment. The CD-ROM packaged with each Manual contains printable copies of each of the book’s 45 Staging Forms.
This concise reference book provides an international standard for pathologists and oncologists and will serve as an indispensable guide for use in the design of studies monitoring response to therapy and clinical outcome. Diagnostic criteria, pathological features, and associated genetic alterations are described in a strictly disease-oriented manner. Sections on all WHO-recognized neoplasms and their variants include new ICD-O codes, incidence, age and sex distribution, location, clinical signs and symptoms, pathology, genetics, and predictive factors. This volume covers tumours of the nasal cavity and paranasal sinuses, of the nasopharynx, of the hypophyranyx, larynx and trachea, of the oral cavity and oropharynx, of salivary glands, as well as odontogenetic tumours, tumours of the ear, the paraganglionic system, and inherited tumour syndromes. Each entity is extensively discussed with information on clinicopathological, epidemiological, immunophenotypic and genetic aspects of these diseases.
Since the publication of the first edition of this best-selling book in 2009, the field of immunohistochemistry has advanced significantly. Fully updated to reflect the latest developments in the field, Modern Immunohistochemistry, Second Edition, is a practical guide to all the important diagnostic markers in each organ system. Concise text is supplemented by over 1,100 high-quality colour images and algorithms. The new edition features even more summary tables, highlighting the key points of differential immunophenotypic panels. A new, expanded introduction explains the basic principles of immunohistochemistry, and chapters have been updated to incorporate predictive/prognostic markers and the latest WHO classifications. All chapters are written by the same expert authors, providing a consistent, engaging style throughout and avoiding contradictory advice. An essential text for residents, this is also an extremely valuable resource for practitioners in anatomic pathology wishing to familiarise themselves with diagnostic markers at a quick glance.
Human tumor cells in culture are valuable for studying cancer causes and properties. This convenient reference provides useful information for cancer researchers on commonly used, established tumor cell lines of the major human organ systems. Atlas of Human Tumor Cell Lines includes data about morphological, metabolic, genetic, and growth characteristics of human tumor cells, with morphological characteristics presented in more than 250 photomicrographs. It also contains information for establishing and maintaining human tumor cell lines in culture, and each chapter covers future perspectives. Covers well-characterized tumor cell lines from the major human organ systems Presents over 250 photomicrographs, both phase-contrast and electron micrographs Includes a list of key references for each chapter Written by world-renowned experts
"The WHO Classification of Tumours of the Digestive System presented in this book reflects the views of a Working Group that convened for an Editorial and Consensus Conference at the International Agency for Research on Cancer (IARC), Lyon, December 10-12, 2009"--P. [5].