Types of oral lesions:A lesion is a general term referring to an abnormality in the tissue. Lesions may be flat or raised, ulcerated, painful, acute or chronic, and have different causes. Whatever the cause or appearance, a lesion is not normal and must be evaluated and treated.
White lesions:White lesions are quite common and may be completely benign or precursor of cancer tissues. Majority of white lesions that are flat are related to irritation and are known as hyperparakeratosis. They may also be in response to fungal infections. More concerning is the white lesions that are precursors of neoplasm (tumor). Early neoplastic changes can appear white and may represent dysplasia (involving partial thickness of the mucosa) or carcinoma-in-situ (involving full thickness of mucosa). A biopsy must be done as soon as possible to establish diagnosis. If neoplastic changes are noted, further treatment may be recommended.One such common lesion is known as Lichen Planus.
Pigmented (colored) lesions:
Pigmented lesions present as brown, red, purple, blue, or in combinations of. The most concerning pigmented lesion is melanoma, which is cancerous and can appear brownish. Red lesions may represent precursor to oral cancer, especially when they are mixed with white lesions. Red or purple lesions may represent a hematoma, which is a benign vascular lesion. Blue-purple lesions are mostly nevus (similar to a birth mark), which are also benign. A biopsy is recommended to establish diagnosis.