Pathology Residents and Alumni
Meet residents training at the forefront of diagnosis and discovery
Residents in pathology and laboratory medicine train at Oregon’s only academic health center, where clinical excellence, research, and education come together. Our close-knit program fosters collaboration while preparing residents to become skilled diagnosticians and thoughtful leaders in the field.
Why residents choose OHSU
Our residents gain experience in both anatomic and clinical pathology within a high-volume setting, building confidence and expertise to excel as pathologists. As a resident, you will find:
- Access to subspecialty fellowship training in GI, hematopathology, neuropathology, cytopathology, molecular genetics and more
- A collegial, supportive community of residents, fellows and faculty
- Commitment to wellness, work-life balance and career development
- Life in Portland, a vibrant, family-friendly city with hiking, biking, exceptional food and outdoor adventure
Pathology residents
Our residents bring diverse backgrounds and perspectives to the program. Below you'll find current trainees listed alphabetically by year.
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Dariela Perez, D.O.
- Clinical interests: Hematopathology, gynecologic and breast pathology, gastrointestinal pathology and molecular
- Interests outside of medicine: Reading, walks, binging TV shows, watching movies and puppies
- Why OHSU? To learn and be surrounded by individuals that would provide the support I need to succeed.
Amanda Saenz, D.O.
- Clinical interests: Hematopathology, molecular and forensics pathology
- Interests outside of medicine: Walking my dog on new hiking trails and taking dance classes in different styles
- Why OHSU? I chose OHSU for residency because it is an academic hospital with a welcoming environment
Joanne Tran, D.O.
- Clinical interests: Dermatopathology and hematopathology
- Interests outside of medicine: Trying new food and dessert spots, binge watching Korean dramas, building Legos/3D puzzles, photography, pickleball and violin
- Why OHSU? During my visiting rotation, I was impressed by the supportive and welcoming culture among the residents, faculty and administration. As a Portland native, returning home to train at OHSU made it an easy choice.
Josh Trapp, D.O.
- Clinical interests: Hematopathology and clinical lab medicine
- Interests outside of medicine: Hiking, board games and baking
- Why OHSU? Attendings and residents are welcoming and eager to teach. Portland is also a great and beautiful place to live!
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Jonathan Bettencourt, D.O.
- Clinical interests: Forensic pathology
- Interests outside of medicine: Hiking, video games and going to estate sales
- Why OHSU? I chose OHSU because of the friendly and supportive learning environment. Being close to all the outdoor wonders that the Pacific Northwest offers is a huge plus!
Emma LaChapelle, M.D.
- Clinical interests: Cytology (fellowship interest; still exploring)
- Interests outside of medicine: Games (board, video, card, TTRPG), training my dog and jigsaw puzzles
Elizabeth Matison, M.D.
- Clinical interests: Hematopathology, clinical laboratory medicine
- Interests outside of medicine: Swimming, crafts (crochet, painting, drawing) and cooking, especially soups
- Why OHSU? OHSU has a wide variety of interesting and unique cases with engaging faculty. Centered in the Pacific Northwest, Portland is an amazing place to live and close to home.
Alatheia Proue, M.D.
- Clinical interests: Neuropathology
- Interests outside of medicine: Knitting, crafting, cats and collecting (rocks, stickers, Funko pops and crafting supplies)
- Why OHSU? The residents: they seemed like family and very friendly.
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Year 3 residents (PGY-3)
Jacob Dougherty, D.O., M.P.H.
- Clinical interests: Renal pathology, blood banking and transfusion medicine
- Interests outside of medicine: Walking, gym, exploring the outdoors, roaming grocery stores, rewatching White Lotus and following the Chicago White Sox
- Why OHSU? When I was picking places to train, I wanted to be somewhere with well-rounded training and a supportive professional environment. I was struck by the caliber of the residents' training here when I rotated through as a medical student, prompting me to pick OHSU as one of my top choices for residency.
Nora Fisher-Campbell, M.D.
- Clinical interests: Gynecologic and breast pathology
- Interests outside of medicine: Mushroom foraging, rockhounding and all things art- related
- Why OHSU? The work culture, my co-residents, and because I love Portland!
Clarice Martinez deCastro, D.O.
- Clinical interests: Gastrointestinal pathology
- Interests outside of medicine: Knitting, cooking, baking, embroidery and anything that invokes coziness
- Why OHSU? OHSU was the Goldilocks program for me — not too large a program but also not too small, and everyone I met was very welcoming.
Sahre Ozpolat, M.D.
- Clinical interests: Forensic pathology
- Interests outside of medicine: Spending time with family and fostering kittens
- Why OHSU? In addition to excellent training, our program listens to our voices, keeps its doors open and is always here to help us. I'm happy to be here.
Liz Thai, D.O.
- Clinical interests: Hematopathology
- Interests outside of medicine: Rock climbing, PC gaming, knitting/crocheting
- Why OHSU? I fell in love with the culture of the program at OHSU. The attendings are here to nurture you in your interests and career goals. The camaraderie among residents is something I cherish. Residency is so hard no matter where you go, but being in the beautiful Pacific Northwest, surrounded by people you can count on, has made such a difference.
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Ricardo Ferral, M.D.
- Clinical interests: Bone and soft tissue, surgical pathology
- Interests outside of medicine: Biking, hiking, soccer, podcasts, popular science and philosophy, film analysis
- Why OHSU? I chose OHSU for its warm and welcoming culture among residents, administrators and faculty, as well as for its excellent training and strong record of placing graduates into competitive fellowships.
Graham Stoddard, D.O.
- Clinical interests: Gastrointestinal and genitourinary pathology
- Interests outside of medicine: Piano, skiing, hiking, strategy games, reading
- Why OHSU? Collaborative, open culture and great training. Plus, Portland is a wonderful place to live!
Chloe Young, M.D.
- Chief Resident, 2026–2027
- Clinical interests: Blood banking and transfusion medicine, gastrointestinal pathology
- Interests outside of medicine: Cycling, cooking and baking, plants (indoor and outdoor), cats
- Why OHSU? OHSU has a strong balance among three prongs of practice: clinical service, leadership and research. All these elements are critical not only to become an effective pathologist in my day-to-day practice, but also to be an excellent pathologist who can lead a laboratory and advance the field through research. Portland is also a wonderful cultural milieu to live outside of the hospital.
Pathology resident alumni
2025
Zhengchun Lu, M.B.B.S., Ph.D., M.Sc.
Molecular genetic pathology fellow, OHSU, 2025–2026
Douglas Preston, M.D., Ph.D.
Molecular genetic pathology fellow, OHSU, 2025–2026
2024
Anfisa Baiandurova, M.D.
Forensic pathology fellow, West Tennessee Regional Forensic Center, 2024–2025
Paula Babb, D.O.
Staff pathologist, St. Charles Bend, Bend, OR
Eric Nomura, M.D.
Staff pathologist, St. Charles Bend, Bend, OR
Benjamin Smith, M.D., M.S.
Bone and soft tissue fellowship, Cleveland Clinic, 2025–2026
2023
Alaaeddin Alrohaibani, M.D.
Staff pathologist, Ochsner LSU Health Shreveport Academic Medical Center, Shreveport, LA
Robert Christian, M.D., M.S.
Assistant professor, Transfusion Medicine, OHSU, Portland, OR
Hetal Gujaria, M.B.B.S., M.D.
Gastroenterology fellowship, Florida, 2024–2025
Cristina Magallanes, M.D.
Staff pathologist, Children’s Health Systems of Texas, Dallas, TX
2022
Ashley Gamayo, M.D.
Hematopathologist, UC Irvine, Orange, CA
2021
Erik Handberg, M.D.
Medical examiner, Fort Bend County Medical Examiner’s Office, Rosenberg, TX
Alyssa Penning, M.D.
Pediatric hematology and oncology fellow, OHSU, 2027 (anticipated)
Maedeh (Mana) Mohebnasab, M.D.
Assistant professor in Molecular Pathology Division at University of Pittsburg, Pittsburg, PA
2020
Erica Swenson, D.O.
Assistant professor (clinical pathology), University of Utah School of Medicine, Salt Lake City, UT
Brian Werstein, M.D.
Pathologist, Legacy Health Systems, Portland, OR
Todd Williams, M.D.
Hematopathology fellowship director, OHSU, Portland, OR
“OHSU gave me the rare combination of a tight-knit, supportive department and a case load of complex, high-stakes diagnostics in AP and CP services that consistently challenge you. And Portland makes the rest of life easy, with incredible food, culture and outdoor access right outside the door.”
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