P=N/A, N=45, Not yet recruiting, Jiangsu Province Hospital, The First Affiliated Hospital of Nanjing Medical University; Jiangsu Province Hospital, The First Affiliated Hospital of Na
P=N/A, N=0, Not yet recruiting, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College; Peking Union Medical College Hospital
P=N/A, N=74, Not yet recruiting, The First Affiliated Hospital of the Air Force Medical University; The First Affiliated Hospital of the Air Force Medical University
P2, N=46, Not yet recruiting, The First Affiliated Hospital, College of Medicine, Zhejiang University; The First Affiliated Hospital, College of Medicine, Zhejiang University
P1/2, N=54, Terminated, Incyte Corporation | Completed --> Terminated; A business decision was made to discontinue further enrollment. There were no safety concerns that contributed to this decision.
Their diagnosis requires careful consideration to accurately distinguish rare indolent entities, recently defined large B‑cell lymphomas, and reactive mimics. Recent classifications, including the newly introduced WHO Classification of Pediatric Tumors, increasingly reflect these unique aspects.
Rituximab monotherapy was initiated, resulting in both clinical and radiological improvement. This case highlights the importance of considering underlying malignancy in patients with unexplained systemic inflammation, vasculitic skin lesions, or cytopenias, particularly when autoimmune markers are negative. Prompt histological diagnosis and multidisciplinary collaboration enabled timely immunochemotherapy, resulting in the resolution of both lymphoma and associated paraneoplastic complications.