Hi,
Your patient is having breakthrough bleeding while on ovarian suppression. Please check
FSH LH and estradiol levels. If they are in post menopausal range go for gynecological examination to check for the cause of bleeding. If they are in premenopausal range , u need to go for tamoxifen and continue leuprolide injection, once the values reach post menopausal range, you can go with letrozole plus leuprolide