Methods: 75 patients were selected, including 39 patients with leukoplakia (Lk), 15 patients with lichen planus (LP) and 21 patients with oral squamous cell carcinoma (SCC).

• 对这些病变患者的普查是很重要的防癌步骤。癌前病变的诊断依赖于组织活检，但并非每个患者都能接受手术介入的方法。