Prognostic significance of immunohistochemical expression of the angiogenic molecules VEGF-A, VEGFR-1 and VEGFR-2 in patients with Classical Hodgkin Lymphoma E. Georgiadi * , G. Dimtsas, P. Karakitsos, T. Vassilakopoulos, I. Thymara, P. Korkolopoulou, E. Patsouris, C. Kittas, I. Doussis-Anagnostopoulou * Larisa, Greece