Photo of Torunn (Torunn)  Yock, MD

Torunn (Torunn) Yock, MD

  • Director, Pediatric Service, Radiation Oncology
  • Associate Professor, Harvard Medical School
  • Chair, Radiation Oncology Quality Assurance


Accepting New Patients



Radiation Oncology

Centers & Specialties

Cancer Center

MassGeneral Hospital for Children

Clinical Interests
  • Pediatric oncology
  • Pediatric tumors
  • Pediatric brain tumors
  • Pediatric malignancies
  • Proton Radiation Therapy
  • Thoracic oncology
Medical Education
  • MD, Harvard Medical School
  • Residency, Massachusetts General Hospital
Board Certifications
  • Radiation Oncology
  • Boston: Massachusetts General Hospital
Insurances Accepted
  • Aetna Health Inc.
  • AllWays Health (NHP) - ACD
  • AllWays Health (NHP) - PBO
  • Beech Street
  • Blue Cross Blue Shield - Blue Care 65
  • Blue Cross Blue Shield - Indemnity
  • Blue Cross Blue Shield - Managed Care
  • Blue Cross Blue Shield - Partners Plus
  • BMC HealthNet Mass Health MCO/ACO
  • Cigna (PAL #'s)
  • Commonwealth Care Alliance
  • Fallon Community HealthCare
  • Great-West Healthcare (formally One Health Plan)
  • Harvard Pilgrim Health Plan - PBO
  • Health Care Value Management (HCVM)
  • Humana/Choice Care PPO
  • MassHealth
  • Medicare
  • Medicare - ACD
  • OSW - Connecticut
  • OSW - Maine
  • OSW - New Hampshire
  • OSW - New York
  • OSW - Rhode Island
  • OSW - Vermont
  • Private Health Care Systems (PHCS)
  • Railroad Medicare
  • Railroad Medicare - ACD
  • Senior Whole Health
  • TriCare
  • Tufts Health Plan
  • Unicare
  • United Healthcare (non-HMO) - PBO
  • Well Sense Pediatrics

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.

Patient Age Group
Pediatric and Adult
Provider Gender


Dr. Yock completed her B.S. in genetics and ethics from Duke University on full academic scholarship as a National Merit and Angier B. Duke Scholar. She then acquired a Masters in Community Health as a Fulbright Scholar and from the University of New South Wales in Sydney, Australia and subsequently an MD from Harvard Medical School. Her residency was at Massachusetts General Hospital. She currently serves as the Chief of Pediatric Radiation Oncology at Massachusetts General Hospital and as an Associate Professor at Harvard Medical School, where she teaches residents, fellow, medical student and PhD students as well as lecturing in multiple continuing medical education classes.  She is an internationally recognized expert in pediatric radiation oncology and serves on multiple committees for the American Society for Therapeutic Radiation Oncology (ASTRO) and Children s Oncology Group (COG) and the American Board of Radiology in the certification process of new and tenured radiation oncologists.

Research & Publications

Research Summary

Dr. Yock has published over 55 medical papers, chapters and reviews and serves on the American Board of Radiology in the certification process of new and tenured radiation oncologists. Her academic efforts have centered on the use of proton radiotherapy, intensity modulation, and image guidance to treat cancer and to spare side effects of therapy including second malignancies in the pediatric population.  MGH is one of the leaders in the development and use of proton radiotherapy and has the largest experience in the world with the pediatric population.  Dr. Yock is the primary investigator of five pediatric proton protocols and she holds grant funding from a variety of sources including the NCI.  She also participates in collaborative research with the Children's Oncology Group and is leading an NIH and MGH sponsored effort to formulate a pediatric proton research collaborative group among the pediatric proton physicians in the United States. Learn more about Dr. Yock's research.


View my most recent publications at PubMed

  1. Pulsifer MB, Sethi RV, Kuhlthau KA, MacDonald SM, Tarbell NJ, Yock TI. Early Cognitive Outcomes Following Proton Radiation in Pediatric Patients With Brain and Central Nervous System Tumors. Int J Radiat Oncol Biol Phys. 2015 Oct 1;93(2):400-7, 2015. PMID: 26254679
  2. Eaton BR, Esiashvili N, Kim S, Patterson B, Weyman EA, Thornton LT, Mazewski C, MacDonald TJ, Ebb D, MacDonald SM, Tarbell NJ, Yock TI. Endocrine outcomes with proton and photon radiotherapy for standard risk medulloblastoma. Neuro Oncol. 2016 Jun; 18(6): 881-7.
  3. Yock TI, Yeap BY, Ebb DH, Weyman E, Eaton BR, Sherry NA, Jones RM, MacDonald SM, Pulsifer MB, Lavally B, Abrams AN, Huang MS, Marcus KJ, Tarbell NJ. Long-term toxic effects of proton radiotherapy for paediatric medulloblastoma: a phase 2 single-arm study. Lancet Oncol. 2016 Mar;17(3):287-98.
  4. Kasper HB, Raeke L, Indelicato DJ, Symecko H, Hartsell W, Mahaja A, Hill-Kayser C, Perkins SM, Chang AL, Childs S, Buchsbaum JC, Laurie F, Khan AJ, Yeap BY, Yock TI. The Pediatric Proton Consortium Registry (PPCR): A Novel Multi-institutional Collaboration among US Proton Centers, International Journal for Particle Therapy, Vol. 1, No. 2, Fall 2014: 323-333.
  5. Ladra ML, Szymonifka J, Mahajan A, Friedmann AM, Yeap BY, Goebel C, MacDonald SM, Grosshans D, Rodriguez-Galindo C, Marcus KJ, Tarbell NJ, Yock TI. Preliminary results of a Phase II Trial of proton radiotherapy for pediatric rhabdomyosarcoma. J Clin Oncol. 2014 Nov 20;32(33):3762-70. PMID: 25332253

News & Events

  • Coverage of study led by Torunn Yock, MD, MCH

    Compared with traditional photon radiotherapy, proton radiotherapy irradiates less normal tissue and might improve health outcomes associated with photon radiotherapy by reducing toxic effects to normal tissue. The investigators did a trial to assess late complications, acute side-effects, and survival associated with proton radiotherapy in children with medulloblastoma.

  • Proton therapy controls common pediatric brain tumor with fewer long-term side effects

    The use of proton radiotherapy to treat the most common malignant brain tumor in children is as effective as standard photon (x-ray) radiation therapy while causing fewer long-term side effects such as hearing loss and cognitive disorders, according to a study receiving online publication in Lancet Oncology.

  • Proton therapy controls common pediatric brain tumor with fewer long-term side effects

    The use of proton radiotherapy to treat medulloblastoma, the most common malignant brain tumor in children, is as effective as standard radiation therapy while causing fewer long-term side effects.

  • Charlie's Story: Instilling Confidence Through a High Standard of Care

    Charlie Beecher's family described the first two years of his life as joyously normal until Charlie developed belly pain. When they found out it was cancer, the Beechers brought Charlie to the Francis H. Burr Proton Therapy Center, which helped Charlie return to his normal, happy childhood.

  • Ryan's Story: Inspired by Compassionate Care to Achieve His Dreams

    When Ryan Schlosser received his master's degree this year, he thought of everyone who supported him along the way, especially his care team at the Francis H. Burr Proton Therapy Center at MGHfC, who played a larger role in his success than he ever imagined.

  • Alex's Story: Family-Centered Care Helps Kids Be Kids Throughout Challenging Treatments

    When Alex Sheehan was diagnosed with a brain tumor at age 10, staff at the Francis H. Burr Proton Therapy Center helped him simply be a kid during a challenging time.

  • Crushing Cancer

    After their 8-year-old son had a successful brain tumor surgery in their home state of Washington, Joe and Leigh McGraw chose to take Tommy to MassGeneral Hospital for Children's Francis H. Burr Proton Therapy Center for targeted treatment. The McGraw's share the story of their experience at MGHfC in the letter and video below.


  • Tommy's Story

    Tommy McGraw, 8 years old, received Proton Beam Therapy at Massachusetts General Hospital after having a brain tumor removed at their hometown hospital, Seattle Children’s Hospital.


Francis H. Burr Proton Therapy Center
55 Fruit Street
Boston, MA 02114-2696
Phone 1: 617-724-1836
Phone 2: 617-726-6876
Fax: 617-724-4808

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