Ugly duckling sign for melanoma: Symptoms, studies, and self-check tips
Ever noticed a mole that stands out like a sore thumb among your others? That’s the “ugly duckling” sign, a straightforward clue dermatologists use to flag potential melanoma early. Coined by Jean-Jacques Grob–and Remy Bonerandi in their 1998 research, it highlights the one lesion that looks different from its neighbors in size, shape, color, or…