A small percentage of patients with chocolate cysts may develop cancer. Chocolate cysts are a form of endometriosis, which is the accumulation of endometrial bleeding from the normal uterine cavity in the ovaries and the formation of cysts, similar to chocolate in color, mainly due to the backflow of menstrual blood planted on the surface of the ovaries and around the fallopian tubes. Most of the symptoms of chocolate cysts are dysmenorrhea, painful intercourse, secondary infertility, heavy menstruation, prolonged periods, etc. Some cysts may rupture, but cancer has been clinically reported in a small number of these patients. If the size of chocolate cyst is about five centimeters, laparoscopic cyst debridement can be considered, but it is easy to recur after the operation. If you can get pregnant as soon as possible after the operation, it will have a certain therapeutic effect on the disease, because after pregnancy, menstruation will stop, which will reduce the shedding of the endometrium, so some of them will be treated by oral contraceptives or traditional Chinese medicine. In short, chocolate cysts are generally not cancerous, but very few people may become cancerous. If you are older, do not have the requirement to have children, and the dysmenorrhea is strong, you can choose surgery to remove the ovaries to achieve the purpose of radical treatment.