<unk>  is a type of skin cancer in which the cells do not make any melanin. They can be pink, red, purple or of normal skin color, and are therefore difficult to diagnose correctly. They can occur anywhere on the body, just as a typical<unk>  can. Often,<unk> s are mistaken for benign lesions, including dermatitis, benign neoplastic processes, or a different malignancy such as basal-cell carcinoma or squamous-cell carcinoma. A poor prognosis is associated with<unk>  lesions, partially due to the difficulty in achieving a diagnosis; however, metastatic<unk>  has a worse prognosis than other subtypes. Survival after diagnosis of<unk>  was found in a 2014 seven-year study of 3,000 patients to be poorer than for pigmented<unk> , which was attributed to the more advanced stage at diagnosis due probably to difficulty of diagnosis. The study also suggested that<unk> s might grow faster than pigmented<unk> s.
Amelanotic melanoma
Pseudomelanoma
Melanocytic nevus
Nodular melanoma
Polypoid melanoma
Cherry angioma
Acral lentiginous melanoma
Desmoplastic melanoma