ORAL CANCER: FUNDAMENTALS, APPLICATIONS, AND EMERGING RESEARCH

Oral cancer constitutes a major global public health challenge, accounting for significant 
morbidity, mortality, and socioeconomic burden (Warnakulasuriya, 2018; Bray et al., 2020; 
Siegel et al., 2022). Predominantly categorized under head-and-neck squamous cell carcinomas 
(HNSCCs), oral cancers arise from the epithelial lining of the lips, tongue, buccal mucosa, floor 
of the mouth, gingiva, or hard palate (Chi et al., 2015; Rivera, 2015). Despite advances in 
diagnostic technology and multimodal treatments, survival rates have remained largely 
unchanged for decades, primarily due to late-stage diagnosis, aggressive disease progression, and 
limited public awareness (Scully & Bagan, 2009; Mehrotra & Gupta, 2006). This paper provides 
a detailed and structured exploration of oral cancer with a specific focus on its epidemiology, 
etiology, pathophysiology, clinical presentation, diagnostic foundations, and current treatment 
modalities. It emphasizes fundamental concepts while integrating contemporary research trends 
such as molecular biomarkers (Glazer et al., 2009; Nagao et al., 2012), precision oncology (Kang 
et al., 2015), artificial intelligence-assisted diagnostics (Hsu et al., 2021; Gupta et al., 2019), 
targeted therapy (Cohen, 2019; Al-Dakkak, 2013), and immunotherapy (Ferris, 2017; Cohen et 
al., 2016).