Myeloproliferative neoplasms (MPN) are uncommon in children/young adults. Here we present data on unselected patients diagnosed before 25 years of age included from 38 centres in 15 countries. Sequential patients were included. We identified 444 patients, with median follow up 9.7 years (0-47.8). Forty-nine (11.1%) had a history of thrombosis at diagnosis, 49 new thrombotic events were recorded (1.16 % pt/year), peri-hepatic vein thromboses were most frequent (47.6% venous events) and logistic regression identified JAK2V617F mutation (p=0.016) and hyperviscosity symptoms (visual disturbances, dizziness, vertigo, headache) as risk factors (p=0.040). New hemorrhagic events occurred in 44 patients (9.9%, 1.04 % pt/y). Disease transformation occurred in 48 patients (10.9%, 1.13 % pt/year), usually to myelofibrosis (7.5%) with splenomegaly as a novel risk factor for transformation in ET (p= 0.000) in logistical regression. Eight deaths (1.8%) were recorded, three after allogeneic stem cell transplantation. Concerning conventional risk scores: IPSET-T and IPSET-NT differentiated ET patients in terms of thrombotic risk. Both scores identified high-risk patients with the same median thrombosis-free survival of 28.5y. No contemporary scores were able to predict survival for young ET or PV patients. Our data represents the largest real-world study of MPN patients age <25 years at diagnosis). Rates of thrombotic events and transformation were higher than expected compared with the previous literature. Our study provides new and reliable information as a basis for prospective studies, trials, and development of harmonized international guidelines for the specific management of young patients with MPN.
The t(14;16) translocation, found in 3%-5% of newly diagnosed (ND) multiple myeloma (MM), has been associated with adverse outcomes. However, the studies establishing the characteristics of t(14;16) included solely small cohorts. The goal of the current international, multicenter (n = 25 centers), retrospective study was to describe the char-
Background. The severe acute respiratory syndrome coronavirus (SARS-CoV-2) has become the cause of a worldwide pandemic, and its clinical infection course in patients with hematological malignancies may be severe. Methods. We performed a retrospective study on 188 chronic lymphocytic leukemia patients (CLL) with COVID-19 infection. Results. At the time of infection 51 patients (27.1%) were treated with Bruton tyrosine kinase inhibitor (BTKi), 46 (24.5%) with anti-CD20 antibodies while 37 patients (19.7%) received venetoclax. In total, 111 patients (59.0%) required hospitalization and 50 patients (26.5%) died due to COVID-19. Patients with poor performance status (ECOG >1; p = 0.02), advanced age (>65 years; p = 0.04), low hemoglobin concentration (≤10 g/dl; p = 0.0001), low platelets (<100 × 109/L; p = 0.003), and elevated lactate dehydrogenase level (LDH; p = 0.014) had an increased risk of death due to COVID-19. Neither CLL treatment status (treatment naïve vs. treated) nor the type of CLL-directed treatment had impact on the SARS-CoV-2 related risk of death. The multivariate survival analysis showed that advanced age (p = 0.009) and low platelet count (p = 0.0001) were associated with significantly shorter patients’ overall survival. Conclusions. SARS-CoV-2 infection in CLL patients is associated with poor outcome regardless of administered CLL-directed treatment.
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