Transformation of a benign oral pigmentation to primary oral melanoma Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontics Diffuse pigmentation of the oral mucosa Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontics Pigmented Lesions of the Oral Mucosa Pocket Dentistry Intramucosal melanocytic nevi CCIDE Dove Medical Press Disorders of Pigmentation of the Nails and Mucous Membranes Springer Nature Link