{"entity":{"id":"mariana-chavez-macgregor","kind":"person","name":"Mariana Chavez-MacGregor","aka":[],"tldr":"Mariana Chavez-MacGregor is a breast oncologist who studies how care is delivered and leads SWOG's international work.","summary":"Mariana Chavez-MacGregor is Professor of Breast Medical Oncology and Health Services Research at MD Anderson Cancer Center and SWOG Executive Officer for International Affairs. A medical oncologist and health services researcher, she studies treatment timing, disparities and outcomes in breast cancer and how care is delivered. Her papers include a JAMA Oncology study of delayed initiation of adjuvant chemotherapy among patients with breast cancer and a JAMA Oncology evaluation of COVID-19 outcomes in US patients with or without cancer. She leads SWOG's international work within the SWOG Cancer Research Network, with a focus on triple-negative and HR-positive breast cancer and cooperative group trials.","asOf":"2026-09-08","links":[{"label":"MD Anderson faculty","url":"https://faculty.mdanderson.org/search?q=Mariana%20Chavez-MacGregor"},{"label":"PubMed","url":"https://pubmed.ncbi.nlm.nih.gov/?term=Chavez-MacGregor%20M%5BAuthor%5D"},{"label":"Google Scholar","url":"https://scholar.google.com/scholar?q=Mariana%20Chavez-MacGregor"}],"tags":[],"related":[],"cancers":["tnbc","breast-hr-positive"],"sections":[],"technologies":[],"targets":[],"drugs":[],"companies":["swog"],"institutions":["md-anderson"],"pathways":[],"terms":[],"trials":[],"people":[],"bottlenecks":[],"keyPapers":[],"journals":[],"dependsOn":[],"notes":[],"role":"Professor, Breast Medical Oncology and Health Services Research, MD Anderson; SWOG Executive Officer for International Affairs","institutionId":"md-anderson","specialisms":["Breast cancer","Health services research","Cooperative group trials"],"profiles":[{"label":"MD Anderson faculty","url":"https://faculty.mdanderson.org/search?q=Mariana%20Chavez-MacGregor"},{"label":"PubMed","url":"https://pubmed.ncbi.nlm.nih.gov/?term=Chavez-MacGregor%20M%5BAuthor%5D"},{"label":"Google Scholar","url":"https://scholar.google.com/scholar?q=Mariana%20Chavez-MacGregor"}],"papers":[{"title":"Delayed Initiation of Adjuvant Chemotherapy Among Patients With Breast Cancer","journal":"JAMA Oncology","year":2016,"url":"https://doi.org/10.1001/jamaoncol.2015.3856","doi":"10.1001/jamaoncol.2015.3856"},{"title":"Evaluation of COVID-19 Mortality and Adverse Outcomes in US Patients With or Without Cancer","journal":"JAMA Oncology","year":2022,"url":"https://doi.org/10.1001/jamaoncol.2021.5148","doi":"10.1001/jamaoncol.2021.5148"}]},"route":"/people/mariana-chavez-macgregor/","neighbours":{"cancer":[{"id":"breast-hr-positive","kind":"cancer","name":"HR-positive / HER2-negative breast cancer","route":"/cancers/breast-hr-positive/"},{"id":"tnbc","kind":"cancer","name":"Triple-negative breast cancer (TNBC)","route":"/cancers/tnbc/"}],"company":[{"id":"swog","kind":"company","name":"SWOG Cancer Research Network","route":"/companies/swog/"}],"institution":[{"id":"md-anderson","kind":"institution","name":"MD Anderson Cancer Center","route":"/institutions/md-anderson/"}]}}