I'm sorry to hear the doctor thinks it is partial molar. The odds of a molar pregnancy leading to cancer are very slim. Here is from another website:
Some molar pregnancies lead to gestational trophoblastic disease. Sometimes this disease keeps growing after molar pregnancy is removed.
* Complete molar pregnancies: Out of 1000 cases of complete molar pregnancy, 150 to 200 develop trophoblastic disease that keeps growing after the tissue is removed. This means that in the other 800 to 850 cases, this doesn't happen.
* Partial molar pregnancies: Out of 1000 cases of partial molar pregnancy, about 50 develop trophoblastic disease. This means that in 950 cases out of 1000, this doesn't happen.
When you have a molar pregnancy, you need treatment right away to remove all of the growth from your uterus.
After treatment, you will have regular blood tests to look for signs of trophoblastic disease. These blood tests will be done over the next 6 to 12 months. You will need to use birth control for the next 6 to 12 months so you don't get pregnant. It is very important to see your doctor for all follow-up visits.
If you do get trophoblastic disease, there's a small chance that it will turn into cancer. But your doctor will likely find it early so it can be cured with chemotherapy. In the rare case when the cancer has had time to spread to other parts of the body, more chemotherapy is needed, sometimes combined with radiation treatment.