Dr. Gregory S. Willis

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 clinical expertise encompasses Glioma, Astrocytoma, Glioblastoma, and Brain Tumor. Dr. Holdhoff is board certified in American Board Of Internal Medicine. Dr. Holdhoff is currently accepting new patients.

Taofeek Owonikoko is an Oncologist practicing medicine in Baltimore, Maryland. Dr. Owonikoko is highly rated in 18 conditions, according to our data. His clinical expertise encompasses Small Cell Lung Cancer (SCLC), Lung Cancer, Non-Small Cell Lung Cancer (NSCLC), EGFR Positive Lung Cancer, and Tissue Biopsy. Dr. Owonikoko is currently accepting new patients.

Dr. Nina Wagner-Johnston is Professor of Oncology at the Johns Hopkins University School of Medicine. Her areas of clinical expertise include non-Hodgkin lymphoma, Hodgkin lymphoma, and HIV-related lymphomas. Dr. Wagner-Johnston serves as the Director for the Lymphoma Drug Development Program at the Johns Hopkins University. Dr. Wagner-Johnston received her baccalaureate degree in nursing from Georgetown University in Washington, DC. She earned her MD and completed her residency training at the University of Chicago, Chicago Illinois. She performed a fellowship in Medical Oncology at Johns Hopkins University, Baltimore, Maryland. Dr. Wagner-Johnston joined the Johns Hopkins faculty in 2015. Prior to joining Johns Hopkins, Dr. Wagner-Johnston was an Assistant Professor at Washington University, St. Louis, Missouri. Her research interests include clinical trial and biomarker development for patients with lymphoma. She is additionally involved in palliative/supportive care research and has a particular interest in chemotherapy-induced peripheral neuropathy. Dr. Wagner-Johnston serves as a member on the NCCN Cancer Related Fatigue Guidelines Panel and the ASCO Neuropathy Guidelines Panel. She has served as a journal reviewer for Annals of Oncology, Leukemia and Lymphoma, Blood, and the Journal of Nuclear Medicine. She is a previous recipient of a Young Investigator Award at the Supportive Oncology Conference as well as a Mentoring Program Award through the American Academy of Hospice and Palliative Medicine. She has served on the National Cancer Institute (NCI) Lymphoma Steering Committee Clinical Trials Design Committee and the NCI Symptom Management and Health Related Quality of Life Steering Committee. She is a member of the American Society of Hematology (ASH), the American Society of Clinical Oncology (ASCO), the AIDS Malignancies Consortium (AMC), and the Eastern Cancer Oncology Group (ECOG) Lymphoma Committee. Dr. Wagner-Johnston is highly rated in 22 conditions, according to our data. Her clinical expertise encompasses Non-Hodgkin Lymphoma, B-Cell Lymphoma, Diffuse Large B-Cell Lymphoma (DLBCL), Bone Marrow Transplant, and Bone Marrow Aspiration. Dr. Wagner-Johnston is currently accepting new patients.