How is a partial hysterectomy surgery done?

is there other alternatives to a partial hysterectomy? is this the best thing to do? my mom, 44 years old, had a molar pregnancy surgery on April 2,2009. the body did not clean out completely, after they did the surgery. she was in chemotherapy, for a month and they were giving her medicine to lower the hormones, but it did not help it only made it worse. the blood levels were going up, the chemotherapy was not killing the bad cells. is there something else that can be done or is this the only way? thank you :]