Hematology and Medical Oncology Fellows and Alumni

HemOnc Fellows with Dr. Druker

Meet our current fellows

Cameron Chalker, M.D.

Cameron Chalker, M.D.
Cameron Chalker, M.D.

Undergraduate: Reed 
Medical School: Royal College of Surgeons in Ireland School of Medicine 
Residency: University of Washington, Washington 

Dr. Chalker earned his BA from Reed in Biology and is completing his residency at the University of Washington. While at UW, he has researched toxicity and efficacy of immunotherapy in patients with head and neck cancer with a poor performance status along with their health care utilization at end-of-life. He is also interested in the intersection of equity and medicine and would like to focus his career on underserved populations with solid tumors. He is particularly interested in working with our veteran population. 

Brie Chun, M.D.

Brie Chun, M.D.
Brie Chun, M.D.

Undergraduate: University of Washington 
Medical School: University of Virginia School of Medicine 
Residency: Providence Portland Medical Center 

Dr. Chun earned her BS in Biology and BA in Dance from the University of Washington and returned to the Northwest for her residency at Providence. Following residency she completed a research fellowship in immuno-oncology at Providence. She is interested in breast cancer and is working with Zahi Mitri on a project characterizing the microbiome in breast cancer patients. She is also working with the lab of Dr. Bahareh Ajami at OHSU. She has published multiple manuscripts and abstracts in recent years, including as a first author in the Journal for ImmunoTherapy of Cancer entitled, “Changes in T-cell subsets and clonal repertoire during chemoimmunotherapy with pembrolizumab and paclitaxel or capecitabine for metastatic triple-negative breast cancer.” 

Hong De Sa, M.D.

Hong De Sa, M.D.
Hong De Sa, M.D.

Undergraduate: Harvard University 
Medical School: Drexel University College of Medicine 
Residency: Case Western Reserve University Hospitals/Rainbows Babies and Children’s Hospital 

Dr. De Sa is originally from Pennsylvania, majored in Neurobiology at Harvard and is completing a four year residency in medicine-pediatrics at Case Western Reserve University/Rainbow Babies and Children’s Hospital. She is interested in malignant hematology and wants to focus on young adults and adolescents. Given her interest in the AYA population and malignant hematology she is an excellent fit for our program and will pursue clinical research during her fellowship. She hopes to work with Dr. Brandon Hayes-Lattin and Dr. Eneida Nemecek during fellowship and develop protocols She has first authored three manuscripts and abstracts in her time as a resident, all while competing in ultra-marathons. 

Ashley Paquin, M.D.

Ashley Paquin, M.D.
Ashley Paquin, M.D.

Undergraduate: Carleton College 
Medical School: Mayo Clinic Alix School of Medicine 
Residency: OHSU 

Dr. Paquin originally hails from Massachusetts but has slowly migrated to the Northwest, starting with her undergrad at Carlton in frosty Minnesota. She received the Glosgow-Rubin Citation for Academic Achievement while at the Mayo Clinic – Arizona for medical school for female students who graduate in the top 10% of their medical class. Prior to medical school she worked at the NIH for two years as a translational researcher which lead to numerous publications and poster presentations. At Mayo, she researched outcomes of patients with Multiple Myeloma and received two ASH abstract awards and a honors scholar award. She will complete her residency at OHSU and has worked with Dr. Rebecca Silbermann performing data collection for a retrospective study of outcomes of patients with primary and secondary plasma cell leukemia. While at OHSU she won several awards including a Housestaff Teaching Award by the Department of Medicine. We are delighted she has decided to stay at OHSU continue her career with us. 

Daniel Chandra, M.D.

Daniel Chandra, M.D., Hem-Onc Fellow
Daniel Chandra, M.D.

I am from Atlanta, Georgia and attended Yale University for college, where I majored in Biology. Following college, I returned to Georgia for medical school at the Medical College of Georgia in Augusta, Georgia, and I stayed there to complete my Internal Medicine residency. I discovered my interest in Hematology/Oncology during medical school while working in a lab studying the immunology of bone marrow transplantation and graft versus host disease. I hope to pursue a career as a physician-scientist with a specific interest in bone marrow transplantation and immunotherapy. Outside of work, I enjoy playing basketball, running, playing the ukulele and skateboarding.

Read about Daniel's research

Selina Liu, M.D.

Selina Liu, M.D., Hem-Onc Fellow
Selina Liu, M.D.

Born in China, Selina came to the U.S. with her family at age 14 and has been calling Portland home since 2004. She first discovered her passion in medicine and cancer biology research after working with Dr. William Fleming at OHSU during high school. After receiving her degrees in biology and international studies from Oregon State University, Selina spent a year as a research assistant in Drs. Stephen Spurgeon and Brian Druker’s laboratory studying the pathogenesis of myeloid neoplasms. She continued with her project during medical school at OHSU, where she further consolidated her interest in hematology oncology. She later went on to complete his internal medicine residency training at University of New Mexico after receiving her M.D. in 2018. As her clinical skill evolved during residency, she gained a deep appreciation of the need for ongoing basic and translational research to improve treatments for patients with hematologic malignancy. She looks forward to continuing her clinical and research training at OHSU as a hematology oncology fellow, where she will work alongside with world-class physicians and researchers to master the art of treating difficult hematologic conditions and the science of conducting translational research for novel cancer interventions.

Read about Selina's research

Kylee Martens, M.D.

Kylee Martens, M.D., Hem-Onc Fellow
Kylee Martens, M.D.

Kylee was born in New Jersey and completed both undergrad and medical school at Emory University in Atlanta. She moved to the Pacific Northwest for residency training at the University of Washington in Seattle, and is excited to now be living in Portland for fellowship. Through her training, she discovered a passion for hematology and hopes to pursue a career in academia exploring questions in thrombosis and hemostasis to inform the care she gives her patients. She is equally interested in mentorship and medical education, both of which she hopes to pursue during her time in fellowship. Outside of medicine, Kylee enjoys a variety of activities like running and baking bread, but her true passion lies in skiing, which first sparked her love for the Pacific Northwest.

Read about Kylee's research

Limin Zhu, M.D., Ph.D.

Limin Zhu, M.D., Ph.D.
Limin Zhu, M.D., Ph.D.

Limin was born and raised in China. She came to the U.S. for undergraduate education at Wesleyan College where she majored in Biology and minored in French, Psychology, and Neuroscience. Through a summer research program at the University of Texas Medical School at Houston during her junior year, she discovered a passion for biomedical research. Limin then went to graduate school at the University of Texas MD Anderson Cancer Center where she focused on translational research exploring the mechanisms underlying pulmonary metastasis of osteosarcoma. She received her Ph.D. in cancer biology in 2014 and her M.D. from the University of Texas McGovern Medical School in 2018. She completed internal medicine residency training at Baylor College of Medicine and continued to participate in clinical research in NTRK fusions and POLE mutation in solid tumors. Limin is particularly interested in sarcoma and GI cancers, and hopes to further broaden her perspective and skills in clinical cancer research during fellowship. She would like to pursue a career in academia and lead translational research and clinical trials that identify novel targets for therapeutic interventions. Outside medicine she enjoys travelling, cooking, and gardening. 

Titas Banerjee, M.D.

Titas Banerjee, M.D., Hem-Onc Fellow
Titas Banerjee, M.D.

Hometown: Parsippany, NJ and Lilburn, GA
Medical School: SUNY - Stony Brook 
Residency Program: University of Rochester

Favorite things to do in Portland: Trying the new Salt & Straw flavors each month, waking up to Mt. Hood and Mount St. Helens views on sunny days, getting out to explore a new waterfall/forest/mountain/coastline every weekend, discovering new food cart pods.

Why OHSU?: You get flexibility to tailor your schedule to your interests and dedicate time to research in second and third year. Also, the VA continuity clinic and weekly fellows' tumor board make for amazing learning in a friendly setting, and you can say you commute to work via the Portland Ariel Tram!

Stephanie Chu, M.D.

Stephanie Chu, M.D., Hem-Onc Fellow
Stephanie Chu, M.D.

Hometown: Hilo, Hawaii
Medical School: John A. Burns School of Medicine at the University of Hawaii
Residency Program: University of Hawaii Internal Medicine Program

Favorite things to do in Portland: Eating, hiking and berry picking.

Why OHSU?: There's a good balance of inpatient and outpatient care, excellent clinical care exposure with access to cutting edge research, true ownership of patients at VA continuity clinic, and flexible scheduling that allows you to tailor your training to your interests.

Michael Pfeffer, M.D.

Michael Pfeffer, M.D., Hem-Onc Fellow
Michael Pfeffer, M.D., Chief Fellow

Hometown: Brookline, MA
Medical School: University of Queensland
Residency Program: Dartmouth-Hitchcock

Favorite things to do in Portland: Hiking around Mt. Hood and the Oregon coast.

Why OHSU?: The wonderful learning opportunities in a continuity clinic working with the veteran population and being a member of a friendly and engaging community.

Rajat Thawani, M.D.

Rajat Thawani, M.D., Hem-Onc Fellow
Rajat Thawani, M.D., Chief Fellow

Hometown: New Delhi, India
Medical School: University of Delhi
Residency program: Maimonides Medical Center, Brooklyn, NY

Favorite things to do in Portland: Trying different food carts, hiking, exploring the coast, biking and enjoying the view of Mt. Hood from our office.

Why OHSU?: OHSU is the perfect balance of clinical and research training. We have our own panel of patients at the VA with supervision from the finest physicians, and expertise available from world experts on the university side. The programs gives us enough time and independence to find our passion and work toward it, after establishing a solid base in our first year. There are experts available in any topic of interest who are always available to mentor research project, answer questions about clinic patients and give career advice.


  • Zizhen (Feifei) Feng, M.D., Ph.D.
    • Summit Health, Bend, Oregon
  • Myung Sun (Sunny) Kim, M.D.
    • Compass Oncology, Portland, Oregon
  • Malinda West, M.D.
    • Assistant Professor at University of Wisconsin, specializing in breast oncology
  • Emily Fay, M.D.
    • Kaiser Mid-Atlantic Permanente Medical Group, Woodlawn, Maryland
  • Luke Fletcher, M.D.
    • Willamette Valley Cancer Institute and Research Center, Eugene, Oregon
  • Allen Li, M.D.
    • Memorial Medical Center Modesto, Modesto, California
  • Vikram Raghunathan, M.D.
    • Seattle Cancer Care Alliance at EvergreenHealth, Kirkland, Washington
  • Adam Kittai, M.D.
  • Emerson Chen, M.D.
    • Assistant Professor of Medicine, Division of Hematology/Medical Oncology, School of Medicine
  • Ted Braun, M.D., Ph.D.
    • Instructor of Medicine, Division of Hematology/Medical Oncology, School of Medicine
  • Joseph Shatzel, M.D.
    • Assistant Professor, Division of Hematology and Medical Oncology, Oregon Health & Science University
  • Robyn Scherber, M.D.
    • Mays Cancer Center UT Health San Antonia
  • Nate Gay, M.D.
  • Kenneth Bensch, M.D., Ph.D.
  • Nina Lamble, M.D.
    Clinical Assistant Professor, University of Washington, Seattle Cancer Care Alliance
  • Austin Lammers, M.D.
  • Sharl Azar, M.D.
  • Jessica Leonard, M.D.
    • Assistant Professor, Division of Hematology and Medical Oncology, Oregon Health & Science University
  • Dawn Brooks, M.D., Ph.D.
    • Berkshire Health Systems, Pittsfield, MA
  • Eliana Kozin, M.D.
  • Matthew Siegel, M.D.
    • Edward Medical Group, Naperville, IL
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