Differential Diagnosis of Pigmented Lesions in the Oral Mucosa: A Clinical Based Overview and Narrative Review Black Lesion on the Tongue Pigmented fungiform papillae, or papillary tip melanosis Registered Dental Hygienists case 348 what's black hairy tongue? lingua villosa Nigra, tetracycline, melanosis, leucoplakia ,navi ORAL MELANOSIS leading to the diagnosis of HIV infection. Despite being a weak association, any unexplained oral pigmentation in a high risk individual should make one suspect HIV associated oral melanosis and proceed