Mary Louise Keohan, MD

Mary Louise Keohan, MD

Medical Oncologist

Clinical Expertise

Sarcomas of Soft Tissue and Bone; New Investigational Therapies; Gastrointestinal Cancers

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Dr. Keohan accepts the following list of insurance providers. Select your insurance provider to see more details.

Contact and Location

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Memorial Sloan Kettering has locations throughout New York City, Long Island, New Jersey, and Westchester. These locations offers many services, including screening, chemotherapy, and medical testing.

About Me


MD, St. George's University School of Medicine (Grenada, West Indies)


University of Medicine and Dentistry of New Jersey


Columbia University College of Physicians & Surgeons

Board Certifications

Internal Medicine; Medical Oncology

I am a medical oncologist who cares for adults with a very rare cancer known as soft tissue sarcoma. These tumors are notoriously difficult to treat because they begin in the connective tissues — such as fat, muscles, nerves, tendons, and blood and lymph vessels — that surround and support other parts of the body.

My fellow medical oncologists and I work alongside a broader disease management team that includes pathologists, surgeons, and radiation oncologists. Together, we create an individualized treatment plan for each patient, based on the need to preserve limb and organ function as best we can. Chemotherapy is often used as part of treatment, either before surgery to shrink a larger tumor or after surgery to kill any remaining cells that remain in the body. As a leader in the treatment of these complicated diseases, we also seek ways to refine and enhance therapy alternatives through various clinical research trials.

I am grateful to receive research funding from a number of sarcoma-related philanthropic organizations, including the Liddy Shriver Ewing’s Sarcoma Fund, the Alan Rosenthal Research Fund in Hemangiopericytoma, and the Dorcas Casey Fund for Sarcoma. From this research, I have published more than 60 journal articles, reviews, and abstracts.

Outside of Memorial Sloan Kettering, I am active in a number of our specialty’s key medical groups, including the American Society of Clinical Oncology, the Connective Tissue Sarcoma Society, and the Sarcoma Alliance for Research Through Collaboration.


Doctors at Memorial Sloan Kettering work as teams, with specialists from all different areas. This allows us to consider all your needs together, and to give you the best possible care.

Clinical Trials

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Find a Clinical Trial for You

Memorial Sloan Kettering's doctors and scientists are constantly developing new treatments for cancer. MSK is typically running hundreds of clinical trials at a given time.

You may be able to participate in a clinical trial even if you are new to MSK. Search our online directory to find trial information and see more about who can participate.