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Chromosome 18: a possible site for a tumour suppressor gene deletion in squamous cell carcinoma of the head and neck. 1995

H Rowley, and A S Jones, and J K Field
Department of Otolaryngology/Head and Neck Surgery, University of Liverpool, UK.

The present study analyses tumour samples from 41 patients with squamous cell carcinoma of the head and neck (SCCHN) using the polymerase chain reaction (PCR) to detect genetic alterations on chromosome 18. Microsatellite markers were used to examine each sample for loss of heterozygosity (LOH) and microsatellite instability. Genetic alterations were most commonly noted on the long arm of chromosome 18 (18q). LOH/microsatellite instability occurred on 18q in 20/41 (49%) of patients. The highest single incidence of LOH was found at 18q21.1-21.3 using the microsatellite marker D18S35. LOH occurred in 10/30 (33%) informative cases while LOH/microsatellite instability occurred in 13/30 (43%) informative cases using this marker. Interestingly the tumour suppressor gene known as the 'deleted in colonic carcinoma' (DCC) gene is located in this region at 18q21.3 but is not commonly lost. This suggests that the marker D18S35 is mapping close to a second as yet unidentified tumour suppressor gene in this area.

UI MeSH Term Description Entries
D007012 Hypopharyngeal Neoplasms Tumors or cancer of the HYPOPHARYNX. Hypopharyngeal Cancer,Neoplasms, Hypopharyngeal,Cancer, Hypopharyngeal,Cancers, Hypopharyngeal,Hypopharyngeal Cancers,Hypopharyngeal Neoplasm,Neoplasm, Hypopharyngeal
D007013 Hypopharynx The bottom portion of the pharynx situated below the OROPHARYNX and posterior to the LARYNX. The hypopharynx communicates with the larynx through the laryngeal inlet, and is also called laryngopharynx. Laryngopharynx,Hypopharynges,Hypopharynxes,Laryngopharynges,Laryngopharynxes
D007822 Laryngeal Neoplasms Cancers or tumors of the LARYNX or any of its parts: the GLOTTIS; EPIGLOTTIS; LARYNGEAL CARTILAGES; LARYNGEAL MUSCLES; and VOCAL CORDS. Cancer of Larynx,Laryngeal Cancer,Larynx Neoplasms,Cancer of the Larynx,Larynx Cancer,Neoplasms, Laryngeal,Cancer, Laryngeal,Cancer, Larynx,Cancers, Laryngeal,Cancers, Larynx,Laryngeal Cancers,Laryngeal Neoplasm,Larynx Cancers,Larynx Neoplasm,Neoplasm, Laryngeal,Neoplasm, Larynx,Neoplasms, Larynx
D007830 Larynx A tubular organ of VOICE production. It is located in the anterior neck, superior to the TRACHEA and inferior to the tongue and HYOID BONE. Anterior Commissure, Laryngeal,Anterior Commissure, Larynx,Laryngeal Anterior Commissure,Laryngeal Posterior Commissure,Posterior Commissure, Laryngeal,Posterior Commissure, Larynx,Anterior Commissures, Laryngeal,Anterior Commissures, Larynx,Commissure, Laryngeal Anterior,Commissure, Laryngeal Posterior,Commissure, Larynx Anterior,Commissure, Larynx Posterior,Commissures, Laryngeal Anterior,Commissures, Laryngeal Posterior,Commissures, Larynx Anterior,Commissures, Larynx Posterior,Laryngeal Anterior Commissures,Laryngeal Posterior Commissures,Larynx Anterior Commissure,Larynx Anterior Commissures,Larynx Posterior Commissure,Larynx Posterior Commissures,Posterior Commissures, Laryngeal,Posterior Commissures, Larynx
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009959 Oropharyngeal Neoplasms Tumors or cancer of the OROPHARYNX. Cancer of Oropharnyx,Oropharyngeal Cancer,Cancer of the Oropharynx,Neoplasms, Oropharyngeal,Oropharynx Cancer,Oropharynx Neoplasms,Cancer, Oropharyngeal,Cancer, Oropharynx,Cancers, Oropharyngeal,Cancers, Oropharynx,Neoplasm, Oropharyngeal,Neoplasm, Oropharynx,Neoplasms, Oropharynx,Oropharnyx Cancer,Oropharnyx Cancers,Oropharyngeal Cancers,Oropharyngeal Neoplasm,Oropharynx Cancers,Oropharynx Neoplasm
D009960 Oropharynx The middle portion of the pharynx that lies posterior to the mouth, inferior to the SOFT PALATE, and superior to the base of the tongue and EPIGLOTTIS. It has a digestive function as food passes from the mouth into the oropharynx before entering ESOPHAGUS. Oropharynxs
D002294 Carcinoma, Squamous Cell A carcinoma derived from stratified SQUAMOUS EPITHELIAL CELLS. It may also occur in sites where glandular or columnar epithelium is normally present. (From Stedman, 25th ed) Carcinoma, Epidermoid,Carcinoma, Planocellular,Carcinoma, Squamous,Squamous Cell Carcinoma,Carcinomas, Epidermoid,Carcinomas, Planocellular,Carcinomas, Squamous,Carcinomas, Squamous Cell,Epidermoid Carcinoma,Epidermoid Carcinomas,Planocellular Carcinoma,Planocellular Carcinomas,Squamous Carcinoma,Squamous Carcinomas,Squamous Cell Carcinomas
D002887 Chromosomes, Human, Pair 18 A specific pair of GROUP E CHROMOSOMES of the human chromosome classification. Chromosome 18
D005819 Genetic Markers A phenotypically recognizable genetic trait which can be used to identify a genetic locus, a linkage group, or a recombination event. Chromosome Markers,DNA Markers,Markers, DNA,Markers, Genetic,Genetic Marker,Marker, Genetic,Chromosome Marker,DNA Marker,Marker, Chromosome,Marker, DNA,Markers, Chromosome

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