[Mucosal disorders of the tongue].

Mucosal diseases of the tongue, such as lingua geographica and lingua villosa, are relatively common and are usually harmless, but can also be more serious, such as oral cavity carcinoma of the tongue. In this article we discuss the diagnosis and treatment of the most common mucosal diseases of the tongue. The influence of underlying systemic conditions, certain medications and preventive advice are also discussed. We also pay attention to the indications for referral to secondary care.