👉 Gairdner's is a type of skin cancer that occurs when melanocytes, which are responsible for producing melanin in the skin, do not develop properly or function normally. This can lead to brownish-black patches on the skin, known as melanoschism, and sometimes a thick, crusty layer called a keratosis pilaris. It is most common in adults, especially those who have had skin cancer before. Treatment options for Gairdner's typically include surgery