<prompt> Oral hairy leukoplakia occurs inCarcinoma tongueOral cardidiasisHIV-AIDSInfectious mononucleosis  <response>: Hairy leukoplakia is a distinctive oral lesion that is usually seen in immunocompromised patients. Approx 80 of patients with hairy leukoplakia are infected with HIV; the presence of this lesion sometimes calls attention to the existence of HIV infection. However rest 20 are seen in Immunocompromised due to cancer therapyor transplant immunosuppression. ref:Robbins pathologic basis of disease; Edition 8 ;pg;743. 