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Oral Squamous Cell Carcinoma (OCC)

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2. Literatures Review 2.1. Oral squamous cell carcinoma (OSCC) Oral cancer (OC) includes a group of neoplasms affecting any region of the oral cavity, pharyngeal regions and salivary glands. However, this term tends to be used interchangeably with oral squamous cell carcinoma (OSCC) (Choi and Myers, 2008). Oral SCC is the most common malignant neoplasm of the oral cavity derived from stratified squamous epithelium including lips, buccal mucosa, lower and upper alveolar ridges, retromolar gingiva, floor of the mouth, hard palate, and the anterior two-thirds of the tongue (Lozano et al., 2013). By gross morphologic examination, the exophytic, ulcerative, or verrucous types are seen (Mehrotra and Yadav 2006). Regardless of the easy access of oral cavity for clinical examination, OSCC is usually diagnosed in advanced stages. …show more content…

2.1.1. Epidemiology Head and neck squamous cell carcinomas (HNSCCs) is the sixth most common cancer with an annual incidence of ~400.000 cases (Duray et al., 2012)6 and represents about 3.5% of all malignant tumors Siegel et al., 2012). Head and neck SCC is quite heterogeneous and most of the tumors arise in the oral cavity, oropharynx, hypopharynx and larynx. Nearly 90% of these cancers are OSCC, which is associated with a poor prognosis, with a 5-year survival rate less than 50% (Osei-Sarfo et al.,

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