A chocolate cyst is an ovarian cyst filled with old blood, which is why it has a dark brown coloring. Chocolate cysts occur when endometrial-like tissues form sacs on the ovaries. Endometriosis causes ...

Ovarian cysts are sacs that form in an ovary or on the surface of an ovary. While many are noncancerous, some could be malignant. In both cases, ovarian cysts may only cause noticeable symptoms as ...