Endometrioid cyst, also known as an endometrioma. It is one kind of cyst that can form on the ovaries. You could have only one, or you could have a cyst on each of your ovaries. While they're often small (less than 2 inches), these cysts can grow as big as 8 inches across.
Endometrioma, also called "chocolate cyst" due to their brown color, are cysts that form on the ovaries.
