Meet Our Fellows

Lisa Wallace, DO
Lisa was born and raised in Massachusetts. She completed her bachelor’s degree at the University of Maryland, and her master’s degree at Tulane University. She attended medical school at Philadelphia College of Osteopathic Medicine. Lisa completed her Clinical Pathology residency here at WashU Medicine and decided to pursue Transfusion Medicine for her career path. She is the current Transfusion Medicine fellow and will be job searching for next year. Outside of work, Lisa enjoys taking her dog for long walks in Tower Grove park, trying new restaurants, and traveling.   

Isaiah Mensah, PhD
Isaiah was born in Afife, Ghana. He earned his Bachelor of Science in Biochemistry, Cell and Molecular Biology from the University of Ghana, and his Ph.D. in Biochemistry from Purdue University. Isaiah’s graduate research focused on the regulation of gene expression in Stem Cell pluripotency maintenance and cardiomyocyte differentiation. Isaiah enjoys playing soccer, biking, and talking to friends and family in his spare time. 

Yanchun Lin, PhD
Yanchun Lin was born and raised in Shantou, China. She earned her Bachelor of Science degree in Chemistry from Shaanxi Normal University and her PhD in Chemistry from Washington University in St. Louis. During her PhD, she used mass spectrometry to characterize the higher order structure of therapeutic antibodies to provide insights into the stability of antibodies under different stressed conditions. Yanchun stayed at WashU Medicine for her clinical chemistry fellowship training. Outside of work, she enjoys weightlifting, outdoor running, cooking, learning about cocktails, and exploring restaurants.

Christopher Zarbock, MD
Chris hails from Wisconsin where he spent many of his formative years. He earned a biomedical engineering degree from Dartmouth College and a Bachelor of Engineering degree from the Thayer School of Engineering at Dartmouth College. He earned his MD from the University of Wisconsin Madison School of Medicine and Public Health and completed a clinical pathology residency at the University of Minnesota Medical School. He is excited to now complete fellowship training in both molecular genetic pathology and clinical informatics – two areas of immense interest to him. Outside of work he likes to tinker with programming and electronics, play board games and computer games, and spend time with his wife and their cats.

Patrick Morse, MD
Patrick Morse was raised between Harrisonville, Missouri and Starkville, Mississippi. He attended the University of Missouri-Columbia for his B.S. in Biochemistry and his M.D.  His first exposure to pathology was working as a lab technician at Boone Hospital, which led to a fulfilling AP/CP training at WashU Medicine/Barnes-Jewish Hospital.  His clinical interests include cytopathology, fine needle aspiration, digital pathology, quality assurance, and the healthcare of underserved populations.  Otherwise, he is making poor choices on TV shows and books, enjoying the outdoors, spending time with family and friends, and corralling his dog and cat. 

Kandice Bailey, MD

Bio coming soon!

Jason Sina, MD
Bio coming soon!

Udita Chapagain, MD
Bio coming soon!

Sylvia Jang, MD
Sylvia was born in Ames, Iowa and spent time in Mason City, IA and Evansville, IN before going to Vanderbilt University in Nashville, TN for a bachelor’s degree in molecular biology and a minor in international politics. She attended medical school at the Medical University of South Carolina (MUSC) in Charleston, SC where she founded the MUSC Asian Student Association and was elected the Vice President of Diversity and Inclusion for the Student Government Association. After receiving her MD, she went on to AP/CP residency at Houston Methodist Hospital in Houston, TX, where she served as chief resident. She is currently loving learning more about breast and gynecologic pathology as the Gyn/Breast fellow at WashU and exploring St. Louis. In her free time, she enjoys watching HGTV, walking in the park with her husband, and cuddling her two cats Smokey and Rocky against their will.   

Anu Rijal, MD
Anu was born and raised in beautiful Kathmandu valley of Nepal. She earned her MBBS degree from Kathmandu Medical College and worked as a general practitioner for some years in Nepal. She then completed residency training in anatomic and clinical pathology at Saint Louis University in June 2024 where she served as a chief resident. Outside work, she loves spending quality time with her precious daughter, hiking, and watching movies.

Maryam Sadough, MD
Maryam is from Iran. She was born, raised and went to medical school in her hometown, Babol. After graduation from medical school, she worked for a few years as a general practitioner and then moved to the US. She finished her AP/CP residency at Louisiana State University, New Orleans. This year she is doing a hematopathology fellowship. Maryam also likes molecular and surgical pathology. She thinks St Louis is a beautiful city, and especially enjoys exploring different trails at Forest Park and spending time at the Arch national park and river side. She also likes to cook, make stained glass, and travel.

Nicholas Borcherding MD, PhD
View faculty profile.

Gregory Martens MD, PhD
View faculty profile.

Ruizhi (Vince) Duan, PhD
Originally from Northwest China, Vince (Ruizhi) completed his predoctoral and postdoctoral training in medical genetics and genomics research at MD Anderson Cancer Center (2016-2018) and Baylor College of Medicine (2018-2023). He holds certifications as a molecular and cytogenetics technologist from the American Society of Clinical Pathology and has a longstanding commitment to research and diagnosis in rare genetic diseases. Outside of the lab, he enjoys hiking, running, weightlifting, as well as watching movies and soccer matches.   

Hamed Rahi, PhD
Hamed Rahi grew up in Kermanshah, a city in western Iran. He received his bachelor’s degree in Biology at the University of Minnesota before earning his Ph.D. in Human Genetics at Howard University. His research focused on the epigenetics of colorectal carcinoma. After his graduate studies, Hamed completed a postdoctoral fellowship at the Biomarker Discovery Laboratory in the Mayo Clinic, where he used next-generation sequencing data to study DNA alterations in prostate cancer patients. He then worked in various clinical cytogenetics laboratories for several years before becoming a fellow in Laboratory Genetics and Genomics at Washington University in St. Louis. In his spare time, he enjoys traveling, cooking, watching movies, and spending time with family and friends.

Larry Ha, MD
Larry grew up in San Jose, California. He completed his undergraduate at UC San Diego. Following that he attended medical school at the University of Utah in Salt Lake City where he also graduated with a Master’s degree in Clinical Informatics. He completed his anatomic and clinical pathology residency training at UC Davis in 2024. Outside of work you can catch him hiking the National Parks, snowboarding, or playing tennis. Side job includes mining and trading cryptocurrency. 

Tina Bui-Bullock, PhD
Tina Bui-Bullock was born in Vietnam and raised in Garland, Texas. She earned her B.S. in microbiology and infectious diseases from the University of Texas at Austin in 2018. In 2023, she completed her doctoral studies at the University of Rochester, focusing on S. aureus bone infections in type 2 diabetics. Tina then became a postdoctoral associate in the Yarbrough lab in the Department of Pathology and Immunology at Washinton University in St. Louis. There, she investigated the utility of screening pregnant women for Haemophilus influenzae as a cause for neonatal infections and a new method for rapid diagnosis of hepatitis C infections. Tina is currently a medical and public health microbiology fellow with interests in the use of the microbiome as a diagnostic and prognostic marker, mixed mycobacterial infections, and leveraging new testing capabilities to improve patient care. In her spare time, Tina enjoys reading (fictional works only), gardening, trying out new restaurants, and spending time with her husband and their three dogs. Among family and friends, she is also known as the queen of Tetris.

Michaela Eickhoff, PhD
Michaela Eickhoff is from Oakwood, Illinois, and she earned her bachelor’s degree in Molecular and Cellular Biology from the University of Illinois at Urbana-Champaign. For her graduate studies, she attended Princeton University where she conducted research in the laboratory of Dr. Bonnie Bassler studying quorum sensing, a process of cell-to-cell communication in bacteria. After earning her PhD in Molecular Biology, she completed a two-year postdoctoral fellowship with the New Jersey Department of Health in the state public health laboratory. Michaela is currently a medical and public health microbiology fellow with interests in molecular diagnostics, antimicrobial resistance, and public health microbiology. In her free time, Michaela enjoys hiking, seeing musicals, and spending time with her family.

Krithika Shenoy, MBBS
Krithika was born and raised in India and graduated with an MBBS degree from Kasturba Medical College in Mangalore, India. She has worked on several translational research projects during medical school has been a recipient of two Indian Council of Medical Research, Short Term Studentship awards. After graduation, Krithika worked as a pathology teaching assistant for medical students at her alma mater before starting her Anatomic and Clinical Pathology residency at Washington University in St. Louis where she served as one of the Anatomic Pathology Chief Residents. She is very excited to start her fellowship in Gastrointestinal and Liver Pathology at Washington University in St. Louis and will be staying back for another year to complete a fellowship in Molecular Pathology. Outside of work, she loves cooking, painting and spending time with friends and family.

Patricia Hernandez, MD
Patricia (Patty) Hernandez was born and raised in Campinas, Brazil. She earned her MD from Pontificia Universidade Catolica de Campinas. When she moved to the United States, she worked on several projects at Mayo Clinic as a research trainee. Thereafter, she started a research assistant position at Institute for Systems Biology, Hadlock Lab. She collaborated on multidisciplinary studies with data scientists and software engineers involving machine learning approach and interpretability risk models for clinical decisions support. She completed her Clinical Pathology residency at WashU and was a former Clinical Pathology chief resident. Currently, Patty is matriculated in the combined Molecular Genetic Pathology and Clinical Informatics fellowship program. Ultimately, her goal is a career in academia. Outside work, Patty enjoys outdoor activities with her babies (fur and human).

Brenndan Crumley, MD
Brenndan was born in St. Louis (at Jewish Hospital before it merged with Barnes, in fact!) and lived in Belleville through middle school, then went to high school in St. Louis County. After leaving for college in Tennessee and graduate and medical school in Philadelphia, he’s happy to be back in St. Louis for both residency and now neuropath fellowship at WashU Medicine. Research interests include neurodegeneration, infectious neuropathology, and medical education. In his free time Brenndan enjoys playing board and video games, making good use of his Spotify subscription, and taking care of his sweet but very spoiled cats. 

Emilie (Mimi) Russler-Germain, MD, PhD
Emilie was born and raised in New York City. She completed her BS in biology with honors in neuroscience at Stanford University. After college, she moved to St. Louis, MO and spent two years studying axon degeneration in the lab of Aaron DiAntonio at WashU Medicine. She subsequently entered the WashU Medicine Medical Scientist Training Program, where she earned her MD and PhD in immunology studying dendritic cell induction of T cell differentiation to gut commensal organisms in the lab of Chyi-Song Hsieh. Emilie is the first year clinical neuropathology fellow and also part of the Physician Scientist Training Program. She is interested in nervous system autoimmune processes as well as CNS tumor immunology. She spends most of her spare time with her wonderful family.

Jackson Rowe, MD

Bio coming soon!

Guilherme Gomide Almeida, MD
Guilherme was born and raised in Juiz de Fora, Brazil, where he earned his medical degree from Universidade Federal de Juiz de Fora. His journey toward pathology began during medical school when he worked as a histology tutor. After his second year of medical training, he was awarded a one-year scholarship through the Brazilian federal government’s Science Without Borders program. During this period, he studied human physiology and conducted research on castrate-resistant prostate cancer at Newcastle University in the United Kingdom. To further expand his knowledge and gain experience in pathology, he completed an elective at the University of Kansas and an observership at the University of Minnesota. Currently, Guilherme is a surgical pathology fellow at WashU Medicine in St. Louis. Next year, he will pursue a fellowship in genitourinary and renal pathology, also at WashU Medicine. Outside of work, he enjoys playing video games, singing, playing the guitar, and spending time with friends and family.