Nonmelanoma Skin Cancers: Lesser Known, More Common How Can You Tell if It's Melanoma or Just a Mole? The Hidden Danger: Amelanotic Melanoma & Why It's Different Non melanoma skin cancer refers to a group of skin cancers that include basal cell and squamous cell carcinoma. They are less worrisome than melanoma, but still require treatment, left untreated, they Amelanotic nodular melanoma misdiagnosed as a benign skin lesion: A rare case report from Syria ScienceDirect