👉 Brachycoma is a condition characterized by an abnormal growth or development of the skin's outer layer, called the epidermis. This can occur in various parts of the body, including the face, hands, and feet, but it most commonly affects the skin on the back of the neck, chest, and abdomen. Brachycomas are typically caused by a genetic mutation or exposure to certain chemicals, such as certain types of pesticides. They may be benign (not cancerous)