Dr. Allen R. Chen

Dr. Matthias Holdhoff is a medical oncologist and co-director of the Brain Cancer Disease Group at the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins. He is a professor of oncology, neurology and neurological surgery at Johns Hopkins University School of Medicine. Dr. Holdhoff’s expertise is in primary brain cancers and central nervous system lymphomas. He earned his medical degree from Freie Universität Berlin, received his doctorate degree at Charité University Medicine Berlin. Dr. Holdhoff completed residency training in internal medicine at Johns Hopkins Bayview Medical Center, followed by a fellowship in medical oncology at Johns Hopkins Hospital with research training at the Ludwig Center for Cancer Genetics and Therapeutics (Kinzler-Vogelstein lab). As a clinical investigator in neuro-oncology, his research is focused on novel trials and translational biomarker studies in malignant gliomas and primary central nervous system lymphomas. He has led and contributed to numerous clinical trials, publications and presentations. Dr. Holdhoff serves as the director of the solid tumor inpatient service at the Sidney Kimmel Comprehensive Cancer Center. He is passionately involved in mentoring and teaching of fellows, residents and students. He is the director of the UCNS-certified neuro-oncology fellowship program at Johns Hopkins, and he is a teaching attending physician for the Osler internal medicine residency program. Dr. Holdhoff is highly rated in 19 conditions, according to our data. His top areas of expertise are Glioma, Glioblastoma, Astrocytoma, and Brain Tumor.

Dr. DeZern is a Professor of Oncology and Medicine at The Johns Hopkins University School of Medicine. She is active in the Division of Hematology Malignancies, Leukemia Program at the Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins. Dr. DeZern has expertise in aplastic anemia, myelodysplastic syndromes, paroxysmal nocturnal hemoglobinuria, acute myeloid leukemia, and bone marrow transplantation. Dr. DeZern received her medical degree at The Johns Hopkins University School of Medicine. She completed a residency in internal medicine at Johns Hopkins, followed by fellowships in medical oncology and hematology, as well as obtained a Masters in Clinical Investigations at the Bloomberg School of Public health. Dr. DeZern is a member of the American Society of Hematology, the American Society of Clinical Oncology, and the American Society for Transplantation and Cellular Therapy. Dr. DeZern’s principle research activities consist of designing and conducting clinical trials that test investigational new therapies and approaches in the treatment of bone marrow failure (aplastic anemia and myelodysplastic syndromes). She has specific expertise in the use of alternative donor bone marrow transplantation in patients with severe aplastic anemia and trials of novel therapeutics for patients with myelodysplastic syndromes. Additionally, she has taken a rigorous approach to the study of diagnostics and supportive case (such as transfusion practices) in these patient populations. She is or has been the Principal Investigator for a number of multicenter trials in collaboration with the MDS Clinical Research Consortium, the Eastern Co-operative Oncology Group (ECOG)-ACRIN and now the Bone Marrow Trials Clinical Trials Network (BMTCTN). She is the Study Chair for the multi-site BMTCTN study (CHAMP) investigating the role of haploidentical donor transplantation using post-transplantation cyclophosphamide in patients with relapsed several aplastic anemia. Dr. DeZern is the local PI as well as the Deputy Chair for The National MDS Study, a collaborative natural history study of the NHLBI and the NCI. As a clinical investigator with a focus on translation of novel treatments to the clinic, Dr. DeZern’s goal is to improve outcomes for patients with bone marrow failure at the bedside and in her research environment. Dr. Dezern is highly rated in 27 conditions, according to our data. Her top areas of expertise are Myelodysplastic Syndrome (MDS), Chronic Myelomonocytic Leukemia (CMML), Acute Myeloid Leukemia (AML), Bone Marrow Transplant, and Bone Marrow Aspiration.

Eric Raabe, M.D., Ph.D., is an associate professor of oncology and pathology at Johns Hopkins School of Medicine. Dr. Raabe majored in neural science at Brown University and received his M.D. and Ph.D. from the University of Cincinnati College of Medicine. He completed his pediatric internship and residency at Children’s Hospital of Philadelphia. After spending a year working in Africa as part of the Baylor International Pediatric AIDS Initiative, Dr. Raabe joined Johns Hopkins as a pediatric oncology fellow. Working in the laboratory of Charles Eberhart in Neuropathology, Dr. Raabe established a neural stem cell system to create genetically accurate models of pediatric brain tumors. In collaboration with patients and families, he has also developed multiple pediatric brain tumor cell lines that are some of the key models used for pre-clinical testing. Dr. Raabe sees patients in the pediatric oncology outpatient clinic at Johns Hopkins, with a focus on pediatric brain tumors. Dr. Raabe is also the point person in oncology for retinoblastoma care. He continues his research in the new Smith Building of the Wilmer Eye Institute in the Neuropathology Division, in collaboration with Charles Eberhart. Dr. Raabe is highly rated in 8 conditions, according to our data. His top areas of expertise are Rhabdoid Tumor, Diffuse Midline Glioma H3 K27M-Mutant, Glioma, and Pediatric Low-Grade Glioma (pLGG).