Cite this article as: Kaya Z, Kirkiz Kayalı S, Topuz Türkcan B, et al. Positron emission tomography imaging and HScore-based diagnosis in two children with malignancy-associated hemophagocytic syndrome: anaplastic large-cell lymphoma and precursor B-acute lymphoblastic leukemia. Turk Arch Pediatr. 2025;60(2):233-234.