What causes a dermoid cyst?

What causes a dermoid cyst?

Dermoid cysts are present at birth (congenital). These cysts occur when skin layers don’t grow together as they should. This happens during the early stages of development in the uterus (fetal development).

For a dermoid cyst to form, skin cells, tissues and glands typically found in skin collect in a sac. These glands continue to produce fluid, often causing the cyst to grow.