School of Medicine
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Professor of Pathology
Current Research and Scholarly Interests I work as a diagnostic surgical pathologist doing translational research in renal neoplasia and medical renal disease and neoplastic and medical liver disease. Subspecialty areas of clinical interest include diagnostic immunohistochemistry, renal, hepatic and transplant pathology.
Marie Hollenhorst, MD, PhD
Clinical Instructor, Pathology
Bio Dr. Hollenhorst is a physician and scientist with expertise in non-malignant hematology, transfusion medicine, and chemical biology. Dr. Hollenhorst values the one-on-one relationships that she forms with her patients, and strives to deliver the highest quality of care for individuals with blood diseases. Her experience caring for patients drives her to ask scientific questions in the laboratory, where she aims to bring a chemical approach to the study of non-malignant blood disease.
Dr. Hollenhorst pursued combined MD and PhD training at Harvard University, where she received a PhD in Chemical Biology under the mentorship of Professor Christopher T Walsh. She subsequently completed a residency in Internal Medicine at Brigham and Women's Hospital, a fellowship in Transfusion Medicine at Harvard Medical School, and a fellowship in Hematology at Stanford.
Dr. Hollenhorst has an interest in the biology of platelets, which are cellular fragments that help the blood to maintain a healthy balance between bleeding and clotting. Working in the laboratory of Professor Carolyn Bertozzi of Stanford Chemistry, Dr. Hollenhorst is studying sugar molecules found on the surface of platelets that are important in controlling their function and lifespan.
Dr. Hollenhorst's research is supported by an NIH K99 Career Pathway to Independence in Blood Science Award for Physician-Scientists, a Stanford Chemistry, Engineering & Medicine for Human Health Physician-Scientist Fellowship, and a National Blood Foundation Early-Career Scientific Research Grant.
Professor (Clinical) of Pathology, Emeritus
Current Research and Scholarly Interests Neuropathology of:
1. Neurodegenerative diseases
2. Neurodevelopmental disorders
3. CNS neoplasms
4. Nerve & muscle diseases
Associate Professor of Pathology
Bio Dr. Howitt is a gynecologic and sarcoma pathologist, with academic interests in gynecologic mesenchymal tumors and morphologic and clinical correlates of molecular alterations in gynecologic neoplasia.
Chris C.S. Hsiung
Bio Chris Hsiung, M.D., Ph.D., is a physician-scientist developing and applying methods for studying the combinatorial functions of genes and genomic regulatory elements in specifying cell states.