What is the difference between an ovarian cyst and a chocolate cyst?

Patient's question:

Recently, I heard that my sister has been diagnosed with a gynecological condition called a cyst. Hello, what are the differences between an ovarian cyst and a chocolate cyst?

Doctor's answer:

The components inside an ovarian cyst are mostly pure liquid. It is a retention cyst formed when a follicle fails to rupture promptly. Having one usually has minimal impact on health, and regular monitoring is generally sufficient. Chocolate cysts are caused by endometrial tissue implanting in the ovary. The ectopic endometrium bleeds during menstruation. Over time, the shedding increases, and the cyst grows larger. Having one can lead to increased menstrual cramping.

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