My wife recently got operated for a 7 cm endometriotic chocolate cyst. I want to know whether the fact that she had a cyst shows that she has endometriosis. By definition, and endometrioma is a cyst formed by endometriosis. So, having an endometrioma means that she has endometriosis. Chocolate cyst is a term that is sometimes used to describe what a surgeon might see.
Blood becomes trapped within the endometrioma, and over time, it becomes dark and thick.
Finally, having old blood within a cyst does not automatically mean it is an endometrioma. Sometimes a normal follicle cyst from a developing egg can bleed a little at ovulation, resulting in a hemorrhagic corpus luteum. It is not always possible to tell the difference between this type of cyst and an endometrioma until you can examine it under the microscope. See Dr. Albee's article on cysts for more information. I want to submit a question .