Hematologia Pediátrica
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Browsing Hematologia Pediátrica by Subject "Adolescent"
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- Age-Dependent Phenotypic and Molecular Evolution of Pediatric MDS Arising from GATA2 DeficiencyPublication . Kotmayer, Lili; Kozyra, Emilia J; Kang, Guolian; Strahm, Brigitte; Yoshimi, Ayami; Sahoo, Sushree S; Pastor, Victor B; Attardi, Enrico; Voss, Rebecca; Vinci, Luca; Kaiser, Max; Dworzak, Michael N; De Moerloose, Barbara; Sukova, Martina; Starý, Jan; Hasle, Henrik; Jahnukainen, Kirsi; Polychronopoulou, Sophia; Kállay, Krisztián; Smith, Owen P; Malone, Andrea; Barzilai Birenboim, Shlomit; Masetti, Riccardo; Buechner, Jochen; Ussowicz, Marek; Kjöllerström, Paula; Bodova, Ivana; Kavcic, Marko; Català, Albert; Turkiewicz, Dominik; Schmugge, Markus; de Haas, Valerie; Okhomina, Victoria I; Sotomayor, Cristian; Catalán, Paula; Wehr, Claudia; Salzer, Ulrich; Germing, Ulrich; Gattermann, Norbert; Bödör, Csaba; Gray, Nathan; Lewis, Sara; Shimamura, Akiko; Giorgetti, Alessandra; Erlacher, Miriam; Niemeyer, Charlotte M; Wlodarski, Marcin WGATA2 deficiency is an autosomal dominant transcriptopathy disorder with high risk for myelodysplastic syndrome (MDS). To elucidate genotype-phenotype associations and identify new genetic risk factors for MDS, we analyzed 218 individuals with germline heterozygous GATA2 variants. We observed striking age-dependent incidence patterns in GATA2-related MDS (GATA2-MDS), with MDS being absent in infants, rare before age 6 years, and steeply increasing in older children. Among 108 distinct GATA2 variants (67 novel), null mutations conferred a 1.7-fold increased risk for MDS, had earlier MDS onset compared to other variants (12.2 vs. 14.6 years, p = 0.009) and were associated with lymphedema and deafness. In contrast, intron 4 variants exhibited reduced penetrance and lower risk for MDS development. Analysis of the somatic landscape revealed unique patterns of clonal hematopoiesis. SETBP1 mutations occurred exclusively in patients with monosomy 7 and their frequency decreased with age. Conversely, the frequency of STAG2 mutations and trisomy 8 increased with age and appeared protective against early development of advanced MDS. Overall, the majority (73.9%) of mutation-positive cases harbored monosomy 7, suggesting it serves as a major driver in malignant progression. Our findings provide evidence for age-appropriate surveillance, and a foundation for genotype-driven risk stratification in GATA2 deficiency.
- Biomarkers and Genetic Modulators of Cerebral Vasculopathy in Sub-Saharan Ancestry Children With Sickle Cell AnemiaPublication . Silva, M; Vargas, S; Coelho, A; Ferreira, E; Mendonça, J; Vieira, L; Maia, R; Dias, A; Ferreira, T; Morais, A; Soares, IM; Lavinha, J; Silva, R; Kjöllerström, P; Faustino, PWe investigated biomarkers and genetic modulators of the cerebral vasculopathy (CV) subphenotype in pediatric sickle cell anemia (SCA) patients of sub-Saharan African ancestry. We found that one VCAM1 promoter haplotype (haplotype 7) and VCAM1 single nucleotide variant rs1409419_T were associated with stroke events, stroke risk, as measured by time-averaged mean of maximum velocity in the middle cerebral artery, and with high serum levels of the hemolysis biomarker lactate dehydrogenase. Furthermore, VCAM-1 ligand coding gene ITGA4 variants rs113276800_A and rs3770138_T showed a positive association with stroke events. An additional positive relationship between a genetic variant and stroke risk was observed for ENPP1 rs1044498_A. Conversely, NOS3 variants were negatively associated with silent cerebral infarct events (VNTR 4b_allele and haplotype V) and CV globally (haplotype VII). The -alpha3.7kb-thal deletion did not show association with CV. However, it was associated with higher red blood cell and neutrophil counts, and lower mean corpuscular volume, mean corpuscular hemoglobin and red cell distribution width. Our results underline the importance of genetic modulators of the CV sub-phenotype and their potential as SCA therapeutic targets. We also propose that a biomarker panel comprising biochemical, hematological, imaging and genetic data would be instrumental for CV prediction, and prevention.
- Comparison of Outcomes of Immunosuppressive Therapy with Rabbit versus Horse Antithymocyte Globulin and Cyclosporine a in Children with Acquired Severe Aplastic Anemia.Publication . Yoshimi, Ayami; Noellke, Peter; Starý, Jan; Kállay, Krisztián; Smith, Owen; Locatelli, Franco; Buechner, Jochen; Bodova, Ivana; Sevilla, Julian; Schmugge, Markus; Bierings, Marc; Masmas, Tania; Dworzak, Michael; Labarque, Veerle; Pawelec, Katarzyna; Jahnukainen, Kirsi; Polychronopoulou, Sophia; Kjollerstrom, Paula; Kavcic, Marko; Erlacher, Miriam; Niemeyer, Charlotte M; Strahm, Brigitte
- COVID- 19 in Patients Affected by Red Blood Cell Disorders, Results From the European Registry ERN-EuroBloodNet.Publication . Puyo, Pablo; Christou, Soteroula; Campisi, Saveria; Rodríguez-Sánchez, Maria A; Reidel, Sara; Perez-Hoyo, Santiago; Mota, Miriam; Savvidou, Irene; Rekleiti, Anna; Salvo, Alessandra; Voi, Vincenzo; Ferrero, Giovanni Battista; Mandrile, Giorgia; Gaglioti, Carmen Maria; Cela, Elena; Ponce-Salas, Beatriz; Bardón-Cancho, Eduardo J; Flevari, Pagona; Voskaridou-Dimoula, Ersi; Nur, Erfan; Biemond, Bart J; Delaporta, Polynexi; Beneitez-Pastor, David; Collado Gimbert, Anna; Spasiano, Anna; Besse-Hammer, Tatiana; Lafiatis, Ioannis G; Dedeken, Laurence; Raso, Simona; Ruiz-Llobet, Anna; Bagnato, Sabrina; Labarque, Veerle; Glenthøj, Andreas; Ruffo, Giovan Battista; Guerzoni, Maria Elena; Hafraoui, Kaoutar; Pistoia, Laura; Rosso, Rosamaria; Tagliaferri, Laura; Gonzalez-Urdiales, Paula; Benghiat, Fleur Samantha; de Montalembert, Mariane; Teles, Maria Jose; Vanderfaeillie, Anna; Bertoni, Elisa; Cuzzubbo, Daniela; Ferreira, Teresa; Saunders, Christopher J; Stiakaki, Eftichia; Van de Velde, Ann L; Diamantidis, Michael D; Kerkhoffs, Jean-Louis H; Oliveira, Marisa I; Quota, Alessandra; Russo, Roberta; Van Damme, An; Argüello Marina, María; Lorite Reggiori, Mikael; Rijneveld, Anita W; Rodríguez Gallego, Alexis; Colombatti, Raffaella; Iolascon, Achille; Taher, Ali; Gulbis, Béatrice; Roy, Noémi B A; Mañú-Pereira, María Del MarBackground: Despite several publications covering patients from multiple centers, no international registry covered all patients with red blood cell diseases (RBCD) affected by COVID- 19. The ERN-EuroBloodNet's registry provided real-time registration of SARS-CoV- 2 patients with RBCD, promoting timely disease-specific knowledge sharing during the pandemic's early stages. Procedures: The study evaluated patient distribution, the infection across different RBCDs, and severity risk factors across similar healthcare systems, using data collected from the ERN-EuroBloodNet's REDCap platform. Results: From April 2020 to April 2023, 681 infections were recorded among 663 patients, of which 373 had transfusion-dependent thalassemia or non-transfusion-dependent thalassemia (TDT/NTDT), and 269 had sickle cell disease (SCD). SCD patients had a higher incidence of COVID- 19 than those with TDT/NTDT (10.5 vs. 4.8 COVID/100 patients). Notably, 92% of the cases were mild, with neither age nor the specific RBCD affecting severity. The number of comorbidities, notably obesity and hypertension, that patients had prior to infection was associated with more severe COVID- 19. During the infection, the presence of vaso-occlusive crises, acute chest syndrome, kidney failure, and ground-glass opacities on chest tomography scans were associated with a more severe clinical picture. The vaccination rate (32%) mirrored that of the general population and showed a protective effect against severe COVID- 19. The observed mortality rate was 0.7%, aligning with Europe's general population. Conclusion: SARS-CoV- 2 infection in SCD and TDT/NTDT patients is mild and without higher mortality than the general population. The ERN-Eurobloodnet's registry collaborative structure exemplifies the power of international cooperation in tackling rare diseases, especially during health emergencies.
- Haemophilia A: Health and Economic Burden of a Rare Disease in PortugalPublication . Café, A; Carvalho, M; Crato, M; Faria, M; Kjollerstrom, P; Oliveira, C; Pinto, PR; Salvado, R; Dos Santos, AA; Silva, CHaemophilia A is a hereditary bleeding disorder, which has been considered rare and chronic. The burden of this disease in Portugal remains unknown. The aim of this study was to estimate the annualized cost and health burden of haemophilia A in Portugal.
- Lemierre Syndrome in a Teenager Presenting as Pulmonary Septic EmbolismPublication . Domingues, R; Neves, JF; Candeias, F; Kjöllerström, P; Brito, MJLemierre syndrome is easily missed and may be more common than generally believed. Usually a complication of a deep neck abscess, it can present suddenly with shortness of breath and hypoxemia. Accurate diagnosis and orientation are mandatory for the treatment of an otherwise potentially life-threatening disease. We describe a case of an adolescent with Lemierre syndrome and septic pulmonary embolism.
- Mental Nerve Neuropathy: A Rare Manifestation in Sickle Cell DiseasePublication . Alcafache, M; Santos, S; Sassetti, M; Batalha, S; Maia, R; Lopes da Silva, R; Kjöllerström, PMental nerve neuropathy is a peripheral sensory neuropathy, characterized by acute numbness of the chin area. It is a rare entity with diverse aetiology including, among others, local odontogenic causes and malignancy. In rare cases, it might be associated with sickle cell disease, due to the combined presence of hyperviscosity and the sinuous course of the mental nerve and artery through the mental foramen. The authors present the case of an adolescent girl with numb chin symptoms during a multifocal sickle cell crisis. The aim is to briefly review the causes of numb chin syndrome, emphasizing the differential diagnosis in sickle cell patients
- Sickle cell anemia - Nitric oxide related genetic modifiers of hematological and biochemical parametersPublication . Aguiar, L; Matos, A; Gil, A; Afonso, C; Almeida, S; Braga, L; Lavinha, J; Kjollerstrom, P; Faustino, P; Bicho, M; Inácio, ASickle cell anemia (SCA) is an inherited blood disorder. SCA patients present clinical and hematologic variability that cannot be only explained by the single mutation in the beta-globin gene. Others genetic modifiers and environmental effects are important for the clinical phenotype. SCA patients present arginine deficiency that contributes to a lower nitric oxide (NO) bioactivity.