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Partners Online Second Opinions

For those with complex medical questions or concerns, looking for answers or alternatives, or simply peace of mind – we are here to help.

Partners Online Second Opinions has provided thousands of patients and physicians remote access to the many specialists affiliated with Partners HealthCare, a Harvard Medical School-affiliated healthcare delivery system, based in Boston, Massachusetts.

The Partners HealthCare network includes top hospitals in the United States, including Massachusetts General Hospital, Brigham and Women’s Hospital, Dana Farber Cancer Institute, and Spaulding Rehabilitation Hospital. Many of our specialists are world-renowned experts in their field, and are available to review medical history and related materials, and provide you with a written consultation report.

When you are faced with decisions regarding a new diagnosis or treatment plan, having another expert opinion is the first step towards getting the care you need.

For 200 years, patients have been traveling to Boston to get some of the best care in the world. Now you can access this expertise from the comfort of your home.


Featured Specialist
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Jason Efstathiou, MD


I am an Instructor of Radiation Oncology at Harvard Medical School and the Massachusetts General Hospital. My clinical practice focuses on the treatment of men with prostate cancer and other urologic malignancies. My clinical research focuses on adverse effects of hormonal therapy for prostate cancer, long-term outcomes and late toxicities with bladder-sparing chemoradiation, the effects of obesity and lifestyle modification on cancer control, as well as investigations into the comparative effectiveness of proton beam therapy for prostate cancer of which the current proposal is a main priority. I hold a doctorate degree in cancer genetics and remain active in translational science. I am actively involved in clinical trial design and with the Radiation Therapy Oncology Group (RTOG), where I am the Principal Investigator of a Phase II study using proton beam radiation therapy with androgen deprivation for locally advanced prostate cancer and serve as the lead for proton evaluation in RTOG's translational research program.

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