Agents for preventing postoperative recurrence of premenopausal breast cancer

摘要

The agent for preventing the postoperative recurrence of premenopausal breast cancer comprising a GnRH agonist or antagonist of the present invention can prevent the postoperative recurrence of premenopausal breast cancer without severe side effects. In addition, by using the agent of the present invention in the form of a long term sustained-release type microcapsule, the drug action can be maintained for a long time without frequently administering the drug, and thus, prevention of the postoperative recurrence of premenopausal breast cancer having a long recurrence-preventing term and having high convenience becomes possible.