Diagnosis is mainly clinical, based on the history and clinical appearance. The differential diagnosis includes other oral white lesions such as Leukoplakia, squamous cell carcinoma, oral candidiasis, lichen planus, white sponge nevus and contact stomatitis. In contrast to pseudomembraneous candidiasis, this white patch cannot be wiped off. Tissue biopsy is sometimes carried out to rule out other lesions, although biopsy is not routinely carried out for this condition.
Smokeless tobacco keratosis
Hydrocarbon keratosis
Arsenical keratosis
PUVA keratosis
Actinic keratosis
Reactional keratosis
Occupational acne
Seborrheic keratosis