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XXI iwCLL Call for Abstracts - NOW OPEN
The International Workshop on Chronic Lymphocytic Leukemia (iwCLL) seeks original abstracts that address scientific questions, demonstrate new research/developments, or contain original scientific results related to the treatment of patients with chronic lymphocytic leukemia (CLL).
The abstract must represent original work, although previously published work may be used to fulfill this requirement. Submission of isolated case reports and hypotheses unsupported by data is discouraged. iwCLL reserves the right to reject any abstract for failure to comply with publication guidelines.
For all abstracts accepted as an Oral Presentation, Oral Poster presentation, YIM Oral Presentation, or YIM Oral Poster Presentation, a presenting author is required to be on-site at the XXI iwCLL meeting in Krakow, Poland.

Abstracts are eligible for being accepted as the following:
ABSTRACT TYPES ACCEPTED
- General: All types of clinical-based and laboratory-based research projects relating to CLL,SLL, and B-cell lymphoproliferative disorders
- Encore: Abstracts containing updated data with respect to a previous presentation. Authors must supply information regarding the original presentation for identification and comparison purposes, indicating the name of the meeting, year, and/or publication number. Encores will not be accepted if published or presented prior to 6 April 2025.
- Trials in Progress (TiP): Must provide if the trial has been registered, the registry, and the registration number upon submission
- Late-Breaking General: General Abstract Types accepted during the late-breaking submission window of 5 July 2025 to 5 August 2025. Late-breaking general abstracts will only be accepted as posters.
ABSTRACT DEADLINES
Submissions are editable until the 30 May 2025 submission deadline. Late-breaker submissions are editable from their opening on 5 July 2025 until their submission deadline of 5 August 2025. Please refer to the list of deadlines below:
Any questions regarding abstract submissions should be sent to abstracts_iwcll@bioascend.com Submission guidelines/instructions can be downloaded HERE (version 4; 05.08.25)Abstract
Submission Site is linked HERE