[Clinical trial of lentaron for postmenopausal patients with advanced breast cancer].

Objective: To evaluate the efficacy and adverse effects of lentaron for postmenopausal patients with recurrent and metastatic breast cancer.

Methods: Thirty-four patients with recurrent and metastatic breast cancer received 250 mg lentaron by intramuscular injection every 2 weeks for at least one month.

Results: In 34 patients who were evaluable for efficacy and toxicity, the complete response rate (CR), partial response rate (PR), disease stabilization rate (SD) and progressive disease rate (PD) were 0%, 14.7%, 58.8% and 26.5%. The clinical benefit rate (CR + PR + SD >/= 6 months) was 50.0%. (17/34) with 12 patients (35.3%) having SD for at least 6 months. The response rates for bone, soft tissue and visceral metastasis were 28.6% (3/14), 13.6% (3/22) and 5.3% (1/19), respectively. There were no severe adverse effects in the treatment bylentaron.

Conclusion: Lentaron is a well tolerated agent with reasonable efficacy but low toxicity for postmenopausal patients with recurrent and metastatic breast cancer.