👉 Escharoid, also known as a mucinous cyst, is a type of skin tumor that develops in the upper part of the epidermis (the outermost layer of the skin). It's usually caused by an abnormal growth of skin cells, called keratinocytes. This growth can be caused by various factors such as exposure to certain chemicals or substances, infections, or genetic abnormalities. The escharoid typically appears on the face, neck, and back, but it can also grow in