A benign, rapidly growing, deeply pigmented tumor of the jaw and occasionally of other sites, consisting of an infiltrating mass of cells arranged in an alveolar pattern, and occurring almost exclusively in infants. Its source of origin is in dispute, the various theories giving rise to its several names. (Dorland, 27th ed). The disease is melanotic neuroectodermal tumor (Experimental Factor Ontology entry EFO_1001038). Also known as: Infantile Melanotic neuroectodermal neoplasm, Melanotic neuroectodermal tumor (morphologic abnormality), Melanotic neuroectodermal tumor of infancy (morphologic abnormality), Neuroectodermal Tumor, Melanotic, Pigmented neuroectodermal tumour of infancy.