Complex sentence: Ovarian cyst removal without oophorectomy or through partial oophorectomy is often used to treat milder cases of endometriosis when non-surgical hormonal treatments fail to stop cyst formation, or to treat extreme pelvic pain from chronic hormonal-related pelvic problems.
Split into simpler sentences: Ovarian cyst removal not involving total oophorectomy is often used to treat milder cases of endometriosis when non-surgical hormonal treatments fail to stop cyst formation. Removal of ovarian cysts through partial oophorectomy is also used to treat extreme pelvic pain from chronic hormonal-related pelvic problems.