This textbook is the result of years of dedicated clinical experience and academic inquiry into the rich heritage of eponymous signs and markers in musculoskeletal medicine. Our intent is to present a comprehensive, clinically relevant, and historically grounded reference for learners and practitioners alike. Drawing from established literature and bedside wisdom, this work integrates anatomical, diagnostic, and functional perspectives, fostering a deeper understanding of each sign�s origin and modern application. We have aimed to make this resource not only a guide for examinations and diagnosis but also a tribute to the pioneers whose names continue to guide clinical reasoning. Each entry is curated with clarity, and practical relevance to support both study and practice.