مقایسهٔ روش‌ها

	گزارش موردی چندمرکزی	مجموعه موارد - مطالعه مشاهده‌ای توصیفی
حوزه	اپیدمیولوژی	اپیدمیولوژی
خانواده	Process / pipeline	Process / pipeline
سال پیدایش	Long-standing practice; CARE guidelines formalized 2013	Longstanding; systematized in 20th century clinical research
پدیدآور	Clinical medicine tradition; CARE guidelines by Gagnier et al.	Historical clinical practice; formalized in modern evidence-based medicine literature
نوع	Observational descriptive study	Observational descriptive study
منبع بنیادین	Gagnier, J. J., Kienle, G., Altman, D. G., Moher, D., Sox, H., & Riley, D. (2013). The CARE guidelines: Consensus-based clinical case reporting guideline development. Journal of Medical Case Reports, 7, 223.	Case series. Wikipedia.
نام‌های دیگر	multi-site case report, collaborative case report, multicentre case report, CARE multicenter report	case series report, clinical case series, consecutive case series, patient series
مرتبط	4	5
خلاصه	A multicenter case report is a structured clinical document describing one or a very small number of unusual patients observed across two or more independent healthcare institutions. By pooling observations from multiple sites, it overcomes the rarity barrier that prevents any single center from documenting an unusual presentation, adverse event, or novel treatment response — producing a richer, more externally valid account than a single-center report can offer.	A case series is a descriptive observational study that documents the characteristics, clinical course, and outcomes of a group of patients who share a common condition, exposure, or intervention. Unlike case reports, which focus on a single patient, a case series aggregates data across multiple patients (typically three or more) to identify patterns, generate hypotheses, and characterize rare or novel conditions — without a concurrent control group.