Mucous membrane pemphigoid (MMP) encompasses a heterogeneous group of diseases, which predominantly affects the elderly. The peak incidence is at roughly 70 years. However, rare childhood cases have also been reported. There is no racial or ethnic predilection associated with MMP, but the condition does appear to be twice as common in women than it is in men. For completeness, MMP is also termed cicatricial pemphigoid, oral pemphigoid and ocular pemphigoid.