A dermoid cyst is an enclosed sac near the surface of the skin that forms during a baby’s development in the uterus.
The cyst can form anywhere in the body. It may contain hair follicles, skin tissue, and glands that produce sweat and skin oil. The glands continue to produce these substances, causing the cyst to grow.
Dermoid cysts are common. They’re usually harmless, but they need surgery to remove them. They don’t resolve on their own.
Dermoid cysts are a congenital condition. This means they’re present at birth.
Dermoid cysts tend to form near the surface of the skin. They’re often noticeable soon after birth. Some may develop deeper inside the body as well. This means diagnosing them may not happen until later in life.
The location of a dermoid cyst determines its type. The more common types are:
Periorbital dermoid cyst
This type of dermoid cyst usually forms near the right side of the right eyebrow or the left side of the left eyebrow. These cysts are present at birth. However, they may not be obvious for months or even a few years after birth.
The symptoms, if any, are minor. There’s little risk to a child’s vision or health. However, if the cyst becomes infected, prompt treatment of the infection and surgical removal of the cyst is essential.