Heterotopic, sebaceous glands appear yellow, pinpoint on the oral mucosa. They are mostly located bilaterally as an extension of the oral fissure but are sometimes also found on the mucosa of the lips, palate, gingiva or the retro-molar pad region. The oval glands typically coalesce and form large plaques which can reach a diameter of several centimeters. This variant is seen in 20 per cent of the population and is considered to be totally harmless. The lesions are asymptomatic and do not require any therapy.