Endometriomas (endometriosis cysts) can have a negative impact on the surrounding ovarian tissue. Sclerotherapy is an outpatient procedure in which the contents of the endometriosis cyst are first aspirated and the cyst is then instilled with alcohol (ethanol) for sclerotherapy in order to destroy the inner layer of the endometrioma. Ideally, the cyst transforms into connective tissue and then degrades itself. The surrounding ovarian tissue is not affected and the ovarian reserve is spared.
The procedure is performed under a short anaesthetic and takes about 20 minutes; after about 2 hours of observation, you can be discharged.