LOCALLY ADVANCED BREAST-CARCINOMA - RESULTS OF A MULTIMODAL THERAPY INCLUDING ALTERNATING NEOADJUVANT CHEMOTHERAPY, SURGERY AND RADIOTHERAPY

Abstract

Thirty women with locally advanced breast cancer (LABC), but no evidence of distant metastases, were prospectively treated with four fixed cycles of neoadjuvant chemotherapy (CT). This regimen consisted of epidoxorubicin (Epi) alternated every 21 days with cyclophosphamide, methotrexate and 5-fluorouracil (CMF). After this induction CT, subsequent therapy was planned according to the response obtained as follows: (a) modified mastectomy with axillary dissection was performed in patients who had major objective response (complete or partial), followed by four doses of adjuvant CT and radiotherapy (RT); (b) debulking rescue surgery followed by RT and 2nd line CT with mitomycin C were given in patients with stable disease or minor response. The response rate to induction CT was 63% (19 of 30 patients) (95% confidence limits 46-80%). Overall, 43% of patients had no persistance of tumor at the end of the planned therapy. After a median follow-up time of 36 months, disease-free survival (DFS) and overall survival (OS) were 35% and 47%, respectively. The median duration of DFS was 16 + months (4-52+ months). A significantly better OS was observed in complete responders compared to the others (77% versus 23.5%; p=0.01). Compliance to treatment was high, gastrointestinal and hematological toxicities were the most common side-effects. Thus, this multimodal approach is effective in reducing primary tumor size with acceptable morbidity. Five of the 11 (45%) patients non responsive to induction CT obtained a transient local control of disease after debulking surgery, RT and mitomycin C. To assess the role of alternating non cross resistant regimens as induction therapy in LABC vs conventional schedules, phase III comparative studies are warrented.