Oral cancer is the most common malignant epithelial neoplasm affecting the mouth. More than 90% is oral squamous cell carcinoma (OSCC) (Table 1)..

The most important feature of ulceration is whether the ulcer is single, multiple or persistent..

Ulceration is a breach in the oral epithelium, which typically exposes nerve endings in the underlying lamina propria, resulting in pain or soreness, especially on eating spicy foods or citrus fruits....