Breast cancer in a tertiary cancer center in India - An audit, with outcome analysis

• Published in: Indian journal of cancer 2018-01, Vol.55 (1), p.16-22
• Main Authors: Nair, Nita, Shet, Tanuja, Parmar, Vani, Havaldar, Rohini, Gupta, Sudeep, Budrukkar, Ashwini, Sarin, Rajiv, Thakur, Meenakshi, Desai, Sangeeta, Yadav, Prabha, jalali, Rakesh, Gulia, Seema, Wadasadawala, Tabassum, Gosh, Jaya, Bajpai, Jyoti, Kembhavi, Seema, Patil, Asawari, Joshi, Shalaka, Popat, Palak, Rangarajan, Venkatesh, Shah, Sneha, Vanmali, Vaibhav, Siddiqui, Shabina, Mittra, Indraneel, Badwe, Rajendra
• Format: Article
• Language: English
• Subjects: Auditing; Breast cancer; Cancer surgery; Cancer therapies; Chemotherapy; HER2 receptor; Lymphatic system; Mammography; Mastectomy; Medical prognosis; Metastasis; Patient outcomes; Risk factors; Survival analysis; Tumors; Ultrasonic imaging; Ultrasound imaging; Womens health
• ISSN: 0019-509X; 1998-4774
• DOI: 10.4103/ijc.IJC_484_17

Background: Survival studies may serve as benchmarks to develop cancer-related policies and estimate baseline survival rates in a given patient population. Materials and Methods: We carried out a retrospective audit of cases managed in 2009 and now report the disease-free survival (DFS) in early breast cancer (EBC) and locally advanced breast cancer (LABC) in patients registered at a tertiary cancer center in India. Results: The study included 2192 patients with breast cancer with ages ranging from 18 years to 94 years with a median of 50 years. Of these, 888 (40.5%) were EBCs Stage I and II, 833 (38%) were LABCs (Stage III), and 471 (21.5%) were de novo metastatic or relapsed cancers at presentation. The 5-year DFS in the women with EBC was 85.5% and in LABC, it was 67.7%, P < 0.001. The factors adversely affecting DFS in EBC were node metastasis (P < 0.001), higher metastatic nodes (P < 0.001), hormone receptor negativity (P = 0.001), and human epidermal growth factor receptor 2 (Her2neu) positivity (P = 0.033). In the multivariate Cox regression analysis in EBC, node-positive status (hazard ratio [HR] 2.28, 95% confidence interval [CI] 1.51-3.45, P < 0.001) and hormone receptor negative tumors (HR 1.96, 95% CI 1.30-2.94, P = 0.001) significantly affected DFS in EBC. The factors adversely affecting DFS in LABC in the univariate analysis were node metastasis (P < 0.001), increasing numbers of nodes (P < 0.001), presence of lymphovascular emboli (LVE) (P < 0.01), mastectomy (P < 0.001), and Her2neu positivity (P = 0.03). In the multivariate Cox regression analysis, node positivity (HR 2.96, 95% CI 2.04-4.29, P < 0.0001), presence of LVE (HR 1.47, 95% CI 1.06-2.04, P = 0.023), and mastectomy (HR 1.49, 95% CI 1.06-2.10, P = 0.023) adversely impacted DFS in LABC. Conclusions: The survival rates in this study are equal to the documented global rates; nodal disease burden emerged as the most important prognostic factor. In addition, in EBCs, a lack of hormone receptor expression and in LABC, Her2neu overexpression appear to worsen the outcome.