Oncotyrol GmbH 1 article published in JoVE Medicine Establishment of a Human Multiple Myeloma Xenograft Model in the Chicken to Study Tumor Growth, Invasion and Angiogenesis Agnieszka Martowicz*1,4, Johann Kern*1,2, Eberhard Gunsilius1, Gerold Untergasser1,3 1Department of Internal Medicine V, Innsbruck Medical University, 2Oncotyrol GmbH, 3Tyrolean Cancer Research Institute, 4Division of Vascular Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institute Human multiple myeloma (MM) cells require the supportive microenvironment of mesenchymal cells and extracellular matrix components for survival and proliferation. We established an in vivo chicken embryo model with engrafted human myeloma and mesenchymal cells to study effects of cancer drugs on tumor growth, invasion and angiogenesis.