Ocular Pathology: What is primary acquired melanosis of the conjunctiva? Black and Brown: Non neoplastic Pigmentation of the Oral Mucosa Head and Neck Pathology Springer Nature Link Figure 2 from Oral pigmentation Semantic Scholar Pigmented Conjunctival Cancers (Primary Acquired Melanosis) New York Eye Cancer Center Pigmented Conjunctival Cancers (Primary Acquired Melanosis) New York Eye Cancer Center