Navigation Menu

Clinical Trial External Search

Provider Display

Sean S. Mahase, MD

Sean S. Mahase, MD
Penn State Cancer Institute
400 University Dr
Hershey, PA 17033
**If mailing, please call to verify address
Publications:
View My Publications
4.9 out of 5
94 Patient Satisfaction Ratings
  • Radiation Oncology
  • Brain cancers and benign tumors
  • Gamma Knife and spine radiosurgery
  • GammaTile brachytherapy
  • Head and neck cancers
  • Palliative radiation therapy
  • Pediatric cancers
  • Sarcomas
  • Spine cancers
  • Stereotactic body radiation therapy

I’m a board-certified radiation oncologist who works closely with teams caring for adults and children with cancers of the brain, spine, head, neck and skin, as well as sarcomas and leukemias/lymphomas. I was drawn to radiation oncology because of the strong bonds I’m able to form with my patients. Penn State Health’s advanced treatment options mean I can use leading-edge technology to treat cancer while protecting healthy tissue from unnecessary radiation exposure.  

During our first meeting, many of my patients discuss their fears about their diagnosis and feel overwhelmed about their treatment. It is very important to me that every person I meet with feels seen as an individual, with hopes, fears and a personal history that is much more than the cancer diagnosis. I help them understand their diagnosis and treatment options through open and clear communication, empowering them to feel well-informed and have the confidence to choose the treatment plan most suited to their goals.  

It is a privilege to care for every one of my patients, and I’m dedicated to supporting them through their challenging cancer journeys. My team will become your or your loved one’s unwavering advocates, striving to ensure any emotional or physical concerns are addressed at every stage.

Professional memberships

  • American College of Radiation Oncology (ACRO)
  • American Radium Society (ARS)
  • American Society for Radiation Oncology (ASTRO)
  • Children’s Oncology Group (COG)
  • North American Base of Skull Society (NSABP)
  • NRG Oncology
  • The Radiosurgery Society (RSS)
  • Radiation Oncology Education Collaborative Study Group (ROESCG)

Medical School
SUNY Downstate at Brooklyn, School of Medicine - 2016

Internship, Internal Medicine
Lenox Hill Hospital (New York) - 2017

Residency, Radiation Oncology
New York - Presbyterian Hospital - 2021

  • American College of Radiation Oncology (ACRO)
  • American Radium Society (ARS)
  • American Society for Radiation Oncology (ASTRO)
  • Children’s Oncology Group (COG)
  • North American Base of Skull Society (NSABP)
  • NRG Oncology
  • The Radiosurgery Society (RSS)
  • Radiation Oncology Education Collaborative Study Group (ROESCG)
  • Assistant Professor and Medical Director, Department of Radiation Oncology
  • Interim Vice Chair for Education, Department of Radiation Oncology
  • Director, Central Nervous System Radiation Oncology
  • Director, Pediatric Radiation Oncology
  • Co-director, Spine Radiosurgery Program