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  • Title: Local recurrence after mastectomy and adjuvant CMF: implications for adjuvant radiation therapy.
    Author: Rangan AM, Ahern V, Yip D, Boyages J.
    Journal: Aust N Z J Surg; 2000 Sep; 70(9):649-55. PubMed ID: 10976894.
    Abstract:
    BACKGROUND: The purpose of the present study was to evaluate the patterns of failure in a series of patients with node-positive breast cancer that was treated by total mastectomy and adjuvant chemotherapy. METHODS: A retrospective review was undertaken of 217 patients with node-positive breast cancer who were referred to the oncology departments of Westmead and Nepean Hospitals following total mastectomy between January 1980 and December 1991. The majority of patients (82%) were pre- or peri-menopausal and all underwent chemotherapy with cyclophosphamide, methotrexate and 5-fluorouracil (CMF) by either an oral or intravenous regimen. No patient received adjuvant radiation therapy. RESULTS: After a median follow up of 8.7 years, 19% of patients had developed a loco-regional recurrence (LRR). The majority of LRR (79%) occurred within the initial 3 years after mastectomy. The risk of LRR was positively associated with the size of the tumour (11% for T1 vs 53% for T3, P < 0.001) and axillary nodal status (16% for three or fewer positive nodes vs 31% for four or more positive nodes, P = 0.017). Patients with T1 or T2 tumours and 1-3 positive nodes had the lowest rate of LRR (11%) while those with T3 tumours or 4-10 positive nodes had the highest rates, ranging from 23 to 75%. Relapse at the chest wall and supraclavicular fossa (SCF) accounted for 46 and 35%, respectively, of all LRR; relapse at the internal mammary chain and axilla was uncommon. CONCLUSION: The data suggest that patients with T3 tumours (> 5 cm) and any nodal involvement or patients with four or more involved axillary nodes, regardless of T stage, are at a high risk of LRR and will benefit from adjuvant radiation therapy to the chest wall and SCF.
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