INTRODUCTIONWorldwide, breast cancer is the leading type of cancer in women, accounting for 25% of all cases.1 In those who have been diagnosed with cancer, a number of treatments may be used, including surgery, radiation therapy, chemotherapy, hormonal therapy and targeted therapy. Surgical intervention ranges from wide local excisions to palliative mastectomy.Modified Radical Mastectomy involves removal of the entire breast including the breast tissue, skin, areola, nipple and most of the axillary lymph nodes.Outcomes for breast cancer vary depending on the cancer type, extent of disease, and person's age. Survival rates in the developed world are high, with between 80% and 90% of those in England and the United States alive for at least 5 years.2 In developing countries survival rates are poorer. Drains remove blood, serum, lymph, and other fluids that accumulate in the wound bed after a procedure. If allowed to build, these fluids put pressure on the surgical site as well as adjacent organs, vessels, and nerves. The decreased perfusion delays healing and the increased pressure causes pain. In addition, fluid collection serves ABSTRACT Background: Active drains are routinely used after Modified Radical Mastectomy (MRM) and is an important factor contributing to increased hospital stay as the patients are often discharged only after their removal. Amongst various factors that influence the amount of post operative drainage, the negative suction pressure applied to the drain has been reported to be of great significance. Against this background a study was conducted to compare the amount and duration of drainage between suction and dependent drainage in patients following Modified Radical Mastectomy. Methods: Patients were randomised using randomly ordered sealed envelopes, which were opened immediately before the closure of the wound, to decide on whether suction or dependent drain was to be given. Drains were removed when output was less than 30 ml per day. Patients were followed up from the day of surgery till the day of drain removal. Statistical analysis was performed with SPSS. Results: There is significant increase in the drain per day in post MRM patients with active suction drain. But, there is no relation between the type of drain and either total drain output or the total number of days of drain. The study also revealed that there is no significant difference in the number of days of hospital stay in both groups of patients. Conclusions: Suction drains do not have any significant advantage over dependent drains after Modified Radical Mastectomy in breast cancer patients.