Dr. John L. Marshall

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 rated as an Elite provider by MediFind in the treatment of Primitive Neuroectodermal Tumor (PNET). His top areas of expertise are Glioma, Glioblastoma, Astrocytoma, and Brain Tumor.

Adam Cohen is an Oncologist in Fairfax, Virginia. Dr. Cohen is rated as a Distinguished provider by MediFind in the treatment of Primitive Neuroectodermal Tumor (PNET). His top areas of expertise are Glioblastoma, Embryonal Tumor with Multilayered Rosettes, Neuroepithelioma, Bone Marrow Aspiration, and Liver Embolization. Dr. Cohen is currently accepting new patients.

Stuart Grossman, M.D., is a professor of oncology at the Johns Hopkins Kimmel Cancer Center. He has served as Principal Investigator and Director of the Central Operations office of the National Cancer Institute-funded phase I/II brain tumor consortia (New Approaches to Brain Tumor Therapy CNS Consortium and the Adult Brain Tumor Consortium) for the past 22 years. He has led many phase I, II, and III institutional and cooperative group translational and clinical brain cancer research projects. Dr. Grossman's expertise is in brain cancers, translational and clinical research, and directing large, multicenter, multidisciplinary clinical trial groups and training programs. Dr. Grossman was an intern and resident at Strong Memorial Hospital in Rochester, NY, and a fellow at the Johns Hopkins University School of Medicine. He received his M.D. from the University of Rochester. Dr. Grossman is rated as an Elite provider by MediFind in the treatment of Primitive Neuroectodermal Tumor (PNET). His top areas of expertise are Glioblastoma, Astrocytoma, Glioma, and Gliomatosis Cerebri.