OP03.04: Imaging in gynecological disease: ultrasound features of malignant yolk sac tumours (endodermal sinus tumours). (30th September 2019) - Anfelter, P.; Testa, A.C.; Chiappa, V.; Froyman, W.; Fruscio, R.; Guerriero, S.; Mascilini, F.; Pascual, M.; Sibal, M.; Savelli, L.; Alcazar, J.; Zannoni, G.; et al.