2026. Primary Mediastinal (Thymic) Large B-Cell Lymphoma in Children and Adolescents: Current Aspects of Pathogenesis, Diagnosis, Therapy, and Long-Term Treatment Complications . Voprosy onkologii. 72, 2 (May 2026), OF-2496. DOI:https://doi.org/10.37469/0507-3758-2026-72-2-OF-2496.