PO-49 CNS thrombosis as initial symptom of ALK+ALCL in a child. Issue 200 (April 2021) - Karametou, M.; Doulioglou, V.; Pavlidou, E.; Patoulias, I.; Prassopoulos, P.; Koletsa, T.; Ioannidou, M.; Palabougiouki, M.; Tragiannidis, A.; Sfougaris, D.; Papageorgiou, T.; Pavlou, E.; et al.