[Dermoscopic changes in melanocytic nevi during use of melanotan II].

For cosmetic reasons, a 24-year-old man performed subcutaneous autoinjections with a preparation having alpha-MSH-like effects (melanotan II) purchased via the internet. The changes of patient's nevi were documented by sequential videodermoscopy before and during treatment. The observed dermoscopic changes made it difficult to differentiate a nevus from a melanoma.