University of Pavol Jozef Safarik 1 article published in JoVE Cancer Research Quail Chorioallantoic Membrane - A Tool for Photodynamic Diagnosis and Therapy Mariana Máčajová1, Veronika Huntošová2, Majlinda Meta1, Barbora Kundeková1, Ivan Čavarga1, Boris Bilčík1 1Centre of Biosciences SAS, IABG, Bratislava, Slovakia, 2Center for Interdisciplinary Biosciences, University of Pavol Jozef Šafárik, Košice, Slovakia The chorioallantoic membrane (CAM) of the avian embryo is a very useful and applicable tool for various areas of research. A special ex ovo model of Japanese quail CAM is suitable for photodynamic treatment investigation.