Effect of prevailing local treatment options of breast cancer on survival outside controlled clinical trials: experience of a specialist breast unit in North India.

BACKGROUND: This study aimed at analyzing different treatments of breast cancer (BC) prevalent in the region, their effect on patients' survival, and discusses the most suitable method within available resources.
METHODS: The study was set up at a tertiary care hospital in north India. We retrospectively reviewed data of 473 female BC patients who attended the departments of Surgical Oncology and Radiotherapy from January 1997 to December 1999. Patients with cTNM stage IV and inoperable stage III were included; those who defaulted or were lost to follow-up were excluded. Out of 473 patients, 372 were selected. The selected patients were divided into groups on the basis of place and type of local treatment they received: (1) local excision only, (2) standard breast conservation therapy (BCT), (3) total mastectomy (TM) + axillary lymph node dissection + radiotherapy (RT), and (4) modified radical mastectomy (MRM) + RT. Data regarding recurrence and survival were analyzed in December 2005. Minimum follow-up was 6 years.
RESULTS: Overall recurrence rates were significantly higher in patients operated elsewhere (P <0.0001). Of 194 operated at our Breast Unit, 25 (14.6%) of 171 MRM patients and none of 23 BCT had recurrence. Of 178 patients operated elsewhere, 44 (100%), 6 (42.9%), 41 (41%), and 8 (40%) developed recurrence in groups 1, 2, 3, and 4 respectively. Overall survival was significantly better in patients with MRM at our unit versus TM outside (93.6% vs. 80%).
CONCLUSIONS: Several types of treatment from improper local excision alone, BCT, TM, to a carefully done MRM are prevalent here. Properly done, MRM yields significant local control with survival benefit and appears to remain the gold standard in management of our BC patients.