There are no 50 shades of melena, only one color: Black; and it's a color that smells bad. Otherwise it's not melena or it's derivatives (melenic, melanotic, melenatonic ) Great thread w a Differentiating between early melanomas and melanocytic nevi: A state of the art review ScienceDirect Melanoma MEDizzy Staging Melanocytic Skin Neoplasms Using High Level Pixel Based Features Melanocyte an overview ScienceDirect Topics Labial or Oral Melanotic Macule Benign, asymptomatic, and often underdiagnosed. Swipe to learn how to recognize, diagnose, and manage this simple yet important lesion! #thebasicdentist #rguhs #kuhs #tnmgrmu #OralPathology #MelanoticMacule #DentalFacts