Melanoma, Amelanotic

**Definition:** An unpigmented malignant melanoma. It is an anaplastic melanoma consisting of cells derived from melanoblasts but not forming melanin. (Dorland, 27th ed; Stedman, 25th ed)

**Tree numbers:** - C04.557.465.625.650.510.515 - C04.557.580.625.650.510.515 - C04.557.665.510.515