
Memorial Sloan Kettering's radiation oncology residents and fellows.
Our residents come from diverse educational and personal backgrounds, but all share a passion for radiation oncology clinical practice and research. We are also fortunate to have multiple fellows as part of our department, specializing in brachytherapy, proton therapy, and CNS.
We work and learn together — in a single residents’ room — and consider the camaraderie of the residents and fellows one of the major strengths of our residency program.
First-Year Residents (July 2024-June 2028)
Revathi Ravella, MD

I was born and raised in West Palm Beach, Florida before moving to Houston, Texas to attend Rice University where I studied biochemistry and cell biology. I then attended medical school at UT Southwestern Medical Center in Dallas, Texas where I became interested in radiation oncology. Under the mentorship of Dr. Kiran Kumar, I investigated the use of radiation in combination with CAR T-cell therapy in patients with refractory DLBCL and explored the use of VMAT in patients undergoing total body irradiation prior to stem cell transplant. I completed my transitional year internship at MSK before joining our radiation oncology residency program. In my free time, I love to play tennis, visit museums, explore Central Park, and cheer on the Knicks!
Elisa Liu, MD

I was born and raised in Honolulu, Hawaii and attended Stanford University, where I majored in bioengineering and studied cartilage tissue regeneration using biomaterials. During this time, I developed an interest in oncology and studied outcomes of stereotactic radiosurgery for brain metastases. After college, I moved to Manhattan to attend NYU Grossman School of Medicine. Under the mentorship of Drs. Erik Sulman and Matija Snuderl, I studied radiation associated secondary malignancies, racial disparities in outcomes, and DNA methylation patterns in central nervous system tumors. I completed a preliminary medicine year at Lenox Hill Hospital prior to joining the MSK Radiation Oncology Residency Program. In my free time, I enjoy lifting weights, card games, and attempting to recreate international recipes.
Alexander Terry, MD, PhD

I grew up in Omaha, Nebraska and went to college at the University of Chicago, where I played varsity baseball and majored in biology. During college, I became fascinated with the biology of cancer and joined the lab of Dr. Kay Macleod, where I was first exposed to cancer metabolism. I then moved across town to begin my MD/PhD training at the University of Illinois at Chicago. In Dr. Nissim Hay’s lab, I studied cancer metabolism and cellular signaling, and my graduate thesis focused on understanding how cancer cells maintain lipid homeostasis under energetic stress and during metastasis in obese mice. Following completion of my PhD, I joined my wife in NYC and completed my final two years of medical school at Stony Brook University. Next, I completed my transitional year internship at MSK prior to joining the Radiation Oncology Residency Program, where I anticipate continuing cancer metabolism research. In my free time, I enjoy reading, sports, sampling new restaurants, and watching TV with my wife and our two cats.
Shoshana Rosenzweig, MD

I was born and raised in Englewood, New Jersey. I attended Brown University where I studied computational biology. For medical school, I attended the Icahn School of Medicine at Mount Sinai through the FlexMed program. During medical school I developed an interest in radiation oncology and disparities in cancer care while conducting research with the bladder cancer research group at Mount Sinai and the pediatric radiation oncology team at the New York Proton Center. Prior to joining the Radiation Oncology residency program, I completed my transitional-year internship at Memorial Sloan Kettering. Outside of the hospital I enjoy running, skiing, cooking, and spending time with family and friends.
Gideon Haber, MD

I grew up just outside Philadelphia, in Merion Station, as one of four siblings. I attended college nearby at the University of Pennsylvania, where I studied physics and biochemistry. After graduation, I spent a year as a National Institutes of Health research fellow, where our lab used high resolution electron microscopy to study clathrin-mediated endocytosis. From Washington, DC, I moved to Saint Louis to attend medical school at Washington University. There, I cultivated my interest in computational research through informatics work on predicting respiratory failure and dosimetry research gauging the accuracy of radiation treatments. I spent my preliminary internal medicine year in California at Kaiser San Francisco prior to joining the radiation oncology residency program at MSK. In my free time, I enjoy cooking/baking, playing tennis, swing dancing, and exploring new restaurants.
Kathryn Hockemeyer, MD, PhD

I grew up in Indianapolis, Indiana and attended Vanderbilt University, where I studied Molecular and Cellular Biology and International Studies. There, I performed research on the crosstalk between fibroblasts and cancer cells in the breast tumor microenvironment. After graduating, I worked at the École Polytechnique Fédérale de Lausanne in Switzerland studying the role of lymphatic endothelial cells in cross-presenting antigens derived from tumor exosomes in melanoma. I then joined the NYU MD-PhD program, where I worked under the mentorship of Iannis Aifantis investigating the role of the proteotoxic stress response in the melanoma tumor immune microenvironment. I completed the Transitional Year program at Memorial Sloan-Kettering prior to starting the Radiation Oncology Residency Program. I am interested in leveraging my research in the tumor immune microenvironment to study cancer cell-immune crosstalk in the context of radiation therapy in metastatic disease.
Second Year Residents (July 2023 – June 2027)
Ross Weber, MD, PhD

David Miller, MD

Yue Helen Zhang, MD

Kevin Boehm, MD, PhD

Sybil Sha, MD

Alok Deshane, MD

Third Year Residents (July 2022 - June 2026)
Nikhil Mankuzhy, MD

Edward “Christopher” Dee, MD

Kaitlyn Lapen, MD

Roshal Patel, MD

Alex Goglia, MD, PhD

Yuzhong “Jeff” Meng, MD, PhD

Fourth Year Residents (July 2021 – June 2025)
Alexandra Dreyfuss, MD, MS

Chengcheng Gui, MD

Christopher Jackson, MD, MS

Gustav Cederquist, MD, PhD

Matthew McMillan, MD

Sana Raoof, MD, PhD

Brachytherapy Fellow (July 2024 - June 2025)
Aneesh Dhar, MD, MS

I grew up in Windsor, Ontario, Canada and studied Medical Physics for my Bachelor’s and Master’s of Science degrees at the University of Windsor. I then attended the Schulich School of Medicine and Dentistry at Western University in London, Ontario, Canada. During this time, I became very interested in Radiation Oncology as a specialty, as I find the use of advanced technologies and caring for patients with cancer to be very rewarding. I completed my five-year Radiation Oncology residency training at McMaster University in Hamilton, Ontario, Canada, and then completed a PGY6 Fellowship in Genitourinary Radiation Oncology at Western University. The topics of this Fellowship were stereotactic radiation for prostate and renal cancers, and advanced imaging of prostate cancer with MRI and PSMA PET. I have since worked as an locum Radiation Oncologist in London, Ontario, Canada, seeing patients with genitourinary, gastrointestinal, breast, and skin malignancies. I am excited to start my Brachytherapy Fellowship at Memorial Sloan Kettering. In my free time, I like to read books, go for hikes, and spend time with family and friends.
Proton Therapy Fellow (July 2024 – June 2025)
Amir Safavi, MD, MSc

I grew up in Toronto, Canada and attended Columbia University for college, where I majored in Biology and Music, studied violin with Juilliard School faculty, and performed at venues including Carnegie Hall. Fascinated by cancer biology, I completed a Master of Science at the University of Toronto investigating the functional genomics of leiomyosarcoma under Dr. Rebecca Gladdy. My clinical interest in oncology led me to medical school at McMaster University and Radiation Oncology residency at the University of Toronto (Princess Margaret Cancer Centre/Sunnybrook Odette Cancer Centre). During this time, I served as Chief Resident and published work in clinical outcomes, health services, and oncology education under Drs. Laura Dawson, David Palma, Alexander Louie, Alejandro Berlin, and Meredith Giuliani. I am excited to train at Memorial Sloan Kettering Cancer Center as an aspiring clinician-investigator and develop expertise in head-and-neck and lung oncology, CNS radiosurgery, as well as adaptive and proton radiotherapy.
Central Nervous System and SRS Fellow (September 2024-September 2025)
Ahmed Galal Rezk, M.B.Ch.B, MSc

I was born and raised in Tanta, Egypt. I completed my medical education at Tanta University, where I obtained my M.B., B.Ch. with honors and also where I then pursued a Master’s degree in Clinical Oncology and Nuclear Medicine. My thesis focused on the changes in hormone receptor status and HER2/neu expression pre- and post-neoadjuvant chemotherapy and its impact on outcomes in patients with primary breast cancer, which deepened my interest in the field of precision oncology.
My professional journey began as a resident physician in Clinical Oncology at Tanta University. I then served as a Radiation Oncologist at CCHE 57357, Egypt, where I gained invaluable experience in pediatric radiation oncology. I also joined Suez and Tanta Universities as an assistant lecturer.
What ignites my interest is the realm of precision radiation oncology, including SRS/SBRT, proton therapy and genomics especially in the management of CNS tumors. My hobbies include swimming and reading. I am passionate about advancing my expertise in radiation oncology and contributing to the improvement of cancer treatment outcomes and I am grateful for the opportunity to further my training at MSKCC, where I have the privilege of working with some of the leading experts in the field.
Clinical Translational Research Fellow (July 2024-June 2025)
Bill Diplas, MD, PhD

I grew up in Blacksburg, Virginia and attended Johns Hopkins University for my undergraduate degree in biomedical engineering. During and after college, I did genetics and biomedical engineering research at Johns Hopkins and then at the Swiss Federal Institute of Technology Lausanne (EPFL) through the Whitaker Fellowship. I then joined the MD/PhD program at Duke University School of Medicine, where I did my doctoral research on cancer genomics and neuro-oncology, funded by the NCI F30, in the laboratory of Hai Yan. My work focused on identifying novel genomic alterations in glioblastoma and developing sensitive mutation-detection tools with applications in liquid biopsy. I completed a transitional year internship at MSKCC and then joined the Radiation Oncology Residency Program at MSKCC. During residency, I did translational research studying genetic and radiographic features of head and neck cancer (Nancy Lee, Nadeem Riaz) and genetic predictors of response to immunotherapy (Steve Maron, Luis Diaz). I served as a chief resident and completed the Holman Research Pathway, working to study factors regulating the alternative lengthening of telomeres (ALT) pathway in cancer in the laboratory of Agnel Sfeir at the Sloan Kettering Institute. I was awarded the K12 Paul Calabresi Career Development Award to support my current translational cancer research training and continue my work studying ALT.