# Mariana Chavez-MacGregor

Source: https://onco.cc/people/mariana-chavez-macgregor/  
OnCo record `mariana-chavez-macgregor` (Person). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

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.

## Fields

- Kind: Person
- Last checked: 2026-09-08
- Role: Professor, Breast Medical Oncology and Health Services Research, MD Anderson; SWOG Executive Officer for International Affairs
- Specialisms: Breast cancer; Health services research; Cooperative group trials

## Sources

- MD Anderson faculty: https://faculty.mdanderson.org/search?q=Mariana%20Chavez-MacGregor
- PubMed: https://pubmed.ncbi.nlm.nih.gov/?term=Chavez-MacGregor%20M%5BAuthor%5D
- Google Scholar: https://scholar.google.com/scholar?q=Mariana%20Chavez-MacGregor

## Connected records

- cancers: [HR-positive / HER2-negative breast cancer](https://onco.cc/cancers/breast-hr-positive/), [Triple-negative breast cancer (TNBC)](https://onco.cc/cancers/tnbc/)
- companies: [SWOG Cancer Research Network](https://onco.cc/companies/swog/)
- institutions: [MD Anderson Cancer Center](https://onco.cc/institutions/md-anderson/)

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