Merkel cell carcinoma is a rare but very aggressive form of skin cancer. It commonly presents as a rapidly growing nodule or bump on a sun-exposed site such as the face, head, or neck. Merkel cell carcinomas can range in color from flesh colored to red, purple, or blue. This type of aggressive skin cancer is more common in individuals who are fair skinned, male, have a history of significant sun exposure, have a history of other skin cancers, and/or who have a compromised immune system. As this type of skin cancer has a high risk of spreading (metastasizing) or recurring, early and prompt diagnosis is crucial for survival. Any new, unusual, changing, or symptomatic growth should prompt a visit to your dermatologist.