COMESAMA, a Mexican coalition for breast health, was launched by 15 Mexican nongovernmental organizations (NGOs) on September 30 in Mexico City. The American Cancer Society is a member of the coalition and an active supporter of the advocacy efforts of founding NGO Fundación CIM*AB. Maria Elena Maza, regional consultant of the American Cancer Society in Mexico and a provider of technical assistance to Fundación CIM*AB, spoke at the event about the importance of patient-led advocacy efforts. Dr Alejandro Mohar, director of the Mexican National Cancer Institute, was also present at the COMESAMA launch. Approximately 20 media representatives were present, including TV, print, and online. COMESAMA is an advocacy coalition aimed at decreasing breast cancer mortality in Mexico. The organization aims to dialogue with decision makers; bring awareness to people affected by breast cancer; generate proposals to improve breast cancer control; raise the public profile of breast cancer issues; and increase access to early detection services. The advocacy areas of action for COMESAMA are: increase access to quality treatment and screening; increase service coverage and free breast health care; increase human and material resources; and earmark funds for breast cancer, guideline revision, and certification of radiology services. COMESAMA is also part of the Latin American breast cancer advocacy coalition, LATINAMAMA, which is a regional initiative led by the American Cancer Society.