Schematic representation of insects' immune effector mechanisms. (A) Download Scientific Diagram Melanosis coli** Melanosis coli is a benign, reversible condition characterized by brown black pigmentation of the colonic mucosa, most often due to chronic use of anthraquinone laxatives. The discoloration is caused An interesting finding in melanocytic nevus that may alarm a pathologist and prompt a thorough search for other features of melanoma Herniation of a nevus nest into the lumen of Melanotic encapsulation of wasp eggs. (A) A Z. indianus larva with an Download Scientific Diagram