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Ethical approval was taken from the Medical University of Lodz Ethics Committee (approval no: RNN\/08\/25\/KE, 14.01.2025).All parents or legal guardians of the participants provided written informed consent for their children's participation in the study.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"Informed consent was obtained from all subjects before enrolment.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent to participate"}},{"value":"Additional informed consent was obtained from all individual participants for whom identifying information is included in this article.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors have no relevant financial or non-financial interests to disclose.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"This study has been previously presented at the conference.","order":6,"name":"Ethics","group":{"name":"EthicsHeading","label":"Note on related congress abstracts and publication"}},{"value":"This paper has been prepared by the authors without the involvement of editing agencies. No AI technologies or editing software were utilized in the creation of this work.","order":7,"name":"Ethics","group":{"name":"EthicsHeading","label":"Editing agencies involved and the use of AI or editing software"}},{"value":"The figures and tables were created by authors using GIMP, Canva, and Microsoft Word. These tools provided essential features for designing and editing the graphics.","order":8,"name":"Ethics","group":{"name":"EthicsHeading","label":"Software tools and image banks"}},{"value":"We conducted a systematic search using Medline\/PubMed, Scopus, and DOAJ from 2010 to 2025. Keywords used included: \"MAS,\" \"systemic juvenile idiopathic arthritis,\" \"macrophage activation syndrome,\" and \"predictive markers.\" Boolean operators combined search terms: (\"MAS\" AND \"sJIA\") OR (\"macrophage activation syndrome\" AND \"juvenile idiopathic arthritis\"). Articles were filtered for English language and relevance to diagnosis and management. We screened 93 articles and included 19 relevant studies.","order":9,"name":"Ethics","group":{"name":"EthicsHeading","label":"Detailed the search strategy for databases"}}]}}