 SEATTLE, WA ACCESSWIRE October 27, 2021 Aptevo Therapeutics Inc. Aptevo or the Company NASDAQ:APVO, a clinical-stage biotechnology company focused on developing novel immuno-oncology therapeutics based on its proprietary ADAPTIRTM and ADAPTIR-FLEXTM platform technologies, will participate at the 2nd Virtual Congress on Controversies in Leukemias EuroLeuk, an international leukemia symposium which is being held October 28-29, 2021, with a Poster Presentation. The poster abstract was selected as one of the best abstracts and included into the Congress program as an oral presentation as well. 