Jefri Adi Kam Sitepu, - and Marjono Dwi Wibowo, Marjono and Iskandar Ali, - The Survival of Locally Advanced Breast Cancer Patients with Luminal Subtype after Modified Radical Mastectomy. International Journal of Research and Review, 8 (11). pp. 191-197. ISSN '2349 – 9788

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Abstract

Abstract Background: Breast cancer is the leading cause of cancer death in women worldwide. Breast cancer has been classified into several molecular subgroups with different prognostic consequences based on immunohistochemistry and molecular pathology. The prognosis that commonly used is 5-years survival. In this study we aimed to examine the relationship between luminal subtype and 5-year survival rate in patients with early post-mastectomy breast cancer. Methods: We recruited early breast cancer patient who underwent modified radical mastectomy (MRM) in Dr. Soetomo General Hospital (Surabaya, Indonesia) between 2010 – 2014. Breast cancer tissues were collected during surgery for immunohistochemistry. The patients’ 5-years survival data was obtained from medical records and by phone call to the patients or to the close relatives of the patients. Breast cancer subtype was determined based on the result of immunohistochemistry Results: A total of 84 patients was included in this study. The majority of patients were aged >40 years (72/84; 85.7%). There were 39 patients (39/84; 46.4%) with luminal A subtype and 45 patients (45/84; 53.6%) with luminal B subtype. Seventy-four patients were diagnosed as invasive ductal carcinoma histologically. Almost all of the patients were able to survive within 5 years (81/84; 96.4%). We found that luminal B had a 1.071 times higher risk of dying within 5 years after therapy than luminal type A, although the analysis did not show significant results (P = 0.101). Conclusion: Luminal B was the most prevalent breast cancer subtype in Surabaya, Indonesia. The prevalence of breast cancer was higher in patients aged >40 years. There was no significant difference between the 5-years survival of luminal A and luminal B subtypes. Keywords: survival, locally advanced breast cancer, luminal subtype, mastectomy.

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