School of Medicine


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  • M. Usman Ahmad

    M. Usman Ahmad

    Postdoctoral Scholar, General Surgery

    BioDr. Ahmad is currently a postdoctoral research fellow under the mentorship of Prof. George Poultsides in the Section of Surgical Oncology at Stanford University. In addition, he engages in basic scientific inquiry in tumor immunology under Prof. Amanda Kirane. As part of an interdisciplinary team, Dr. Ahmad is currently investigating the role of the intratumor microbiome and response to treatment for patients with pancreatic cancer funded by the Stanford Cancer Institute (SCI) and Sarafan ChEM-H. He entered his current position after completing 2 years of general surgical training at Stanford University and the University of Colorado.
    Dr. Ahmad received his medical education at the University of South Florida (USF) where he was the recipient of numerous scholarships and awards including the Galen Scholarship, SELECT Koch Award, Anderson SELECT Scholarship, and Osler Award. During medical school, Dr. Ahmad was productive in both basic science and research resulting in 3 peer-reviewed publications and induction into the Robert A. Good Honor Society bestowed upon the top 10% of medical students in research. Dr. Ahmad also received the Alpha Omega Alpha Carolyn A. Kuckein Fellowship to continue policy work on improving the organ supply for Americans requiring organ transplants. Early in medical school, he conducted basic scientific work transplanting immune cells on metastatic melanoma in a mouse model while a visiting researcher under Prof. Gavin Pettigrew & Prof. Reza Mottalebzadeh in the Department of Surgery at the University of Cambridge in the United Kingdom. Dr. Ahmad was also active in health policy work culminating in a role as Vice Chair of the Medical Student Section Committee of Legislation & Advocacy for the American Medical Association with several roles at university, county, and state levels in both Florida and Pennsylvania. Dr. Ahmad has an extensive record of volunteer activity serving at risk populations in the United States during medical school including HIV, LGBTQ, pediatric, and homeless populations. In addition, he spends time mentoring and reviewing scholarship applications for Greenhouse Scholars, program focused on developing under-resourced high performing American students from high school to first career and beyond.
    Prior to medical school, Dr. Ahmad had a career in the life sciences industry after receiving a degree in Economics from Northwestern University where he primarily focused on bringing new medical technology to market. Dr. Ahmad was part of a team selected by the Chicago Chamber of Commerce as the most innovative company in 2010 winning a state-wide competition. He also volunteered his time as a board member re-vitalizing a 25 year old arts organization in Chicago and helping to develop a business incubator in Detroit shortly after the Great Recession.
    Dr. Ahmad is a native Chicagoan hailing from a large family raised near the Southside of Chicago. In his free time he enjoys cooking, reading, history, traveling, working on cars, and developing his interest in aviation.

  • Jean Jingzhi Bao

    Jean Jingzhi Bao

    Clinical Assistant Professor, Surgery - General Surgery

    BioDr. Jean Bao is a board-certified, fellowship-trained general surgeon who specializes in breast surgical oncology. She is a clinical assistant professor of surgery at Stanford University School of Medicine.

    Dr. Bao’s clinical interests include treatment of men and women who have breast cancer, benign breast disease, genetic mutations, family history of breast cancer, or other breast cancer risk factors. Procedures performed by Dr. Bao include skin- and nipple-sparing mastectomies, partial mastectomies, oncoplastic procedures, benign breast lesion excisions, axillary node dissections, and sentinel lymph node biopsies. Dr. Bao is certified in breast ultrasound and utilizes this technology to visualize and biopsy breast masses.

    She completed a breast surgical oncology fellowship at Cedars-Sinai Medical Center under the mentorship of one of the world’s foremost experts in the field. Prior to joining Stanford, Dr. Bao practiced at the University of Chicago as an assistant professor of surgery in the Breast Center.

    Dr. Bao works closely with medical oncology, radiation oncology, plastic surgery, genetics, and other breast cancer specialists in a multidisciplinary setting to provide high quality, evidence-based, and individualized care. Dr. Bao is a strong advocate for patient education and empowerment and strives to deliver compassionate care to patients and their families.

    Her research has focused on the management of breast cancer in older patients, male breast cancer, high-risk breast cancers, and axillary lymph node management after preoperative chemotherapy. She also has strong research interests in intraoperative 3D breast imaging, the benefits and risks of prophylactic mastectomy, fertility issues in young women with breast cancer, and the role of endocrine therapy in breast cancer. She has delivered presentations on a wide range of topics related to breast cancer at national and regional meetings. The results of her research have been published in JAMA, Annals of Surgical Oncology, Breast Journal, Clinical Imaging, and elsewhere.

    For her scholarship and research achievements, Dr. Bao has won numerous honors and awards. She earned the Excellence in Teaching Award twice from the University of Chicago Department of Surgery. She was also named a Lynn Sage Breast Cancer Symposium Scholar, where she joined other medical, surgical, and radiation oncologists who lead in the field.

    Dr. Bao is a fellow of the American College of Surgeons and a member of the American Society of Breast Surgeons. She is a member of Breast Disease Site Work Group in the Society of Surgical Oncology, and serves as the society’s external liaison to the American College of Radiology Appropriateness Criteria Breast Imaging Panel. She previously held the position of chair of the Cancer Committee at University of Chicago Medicine.