Diagnostic Accuracy of Synovial Calprotectin in Megaprosthetic Reconstructions: A Prospective Cohort Study from a Tertiary Sarcoma Center. - Gavriil, Panayiotis; Altsitzioglou, Pavlos; Trikoupis, Ioannis; Maleka, Efthalia; Briassoulis, Panagiotis; Hardes, Jendrik; Papagelopoulos, Panayiotis; Kontogeorgakos, Vasileios (Cancers, 2026)