Patients infected with the human immunodeficiency virus frequently suffer from characteristic lesions of the oral cavity and in some patients the oral lesions are the first manifestation of the disease.  Candidiasis is present in over 50% of infected patients, the erythematous type being predominant in the primary stages and the pseudomembranous type present in those patients who have developed AIDS.  Patients tend to have simultaneous mirror lesions on the palate and dorsum of the tongue.  At the lip commisures the candidiasis causes actinic cheilitis .(see photos)