Pigmented tumor-like lesions in an ophluroid echinoderm.
D004447:Echinodermata; D008545:Melanoma / Q000453:epidemiology* / Q000473:pathology; D009508:Nevus, Pigmented / Q000453:epidemiology* / Q000473:pathology; D012878:Skin Neoplasms / Q000453:epidemiology* / Q000473:pathology