Abstract
The purpose of our study was to assess prospectively the value of MRI in characterization of soft tissue tumors (STT) and soft tissue tumor-like lesions in a multi-institutional setting by a group of experts. The material consisted of 548 untreated and proven STT or tumor-like lesions originating from a multi-institutional database of STT in which 930 consecutive patients with STT examined by MRI were registered between 1 January 2001 and 28 April 2003. Based on MRI findings, a suitably ordered differential diagnosis was made in consensus by two radiologists (J.L.M.A.G and A.M.D.S). MRI diagnoses were compared with histology results (455 cases, 83%) and/or 6-month follow-up (93 cases, 17%) as reference standards. The correlation between the MRI and histological diagnosis and between the radiological and histological phenotype were statistically determined. One hundred twenty-three patients presented with a malignant STT; 425 patients presented with a benign one. Concerning differentiation between malignant and benign lesions (dignity), a sensitivity of 93%, specificity of 82%, negative predictive value (NPV) of 98% and positive predictive value (PPV) of 60% with accuracy of 85% were obtained. Concerning phenotype characterization, if only the first MRI diagnosis was taken into account, a sensitivity of 67%, specificity of 98%, NPV of 98%, PPV of 70% and accuracy of 96% were obtained. For benign lesions, sensitivity of 75%, specificity of 98%, NPV of 98%, PPV of 76% and accuracy of 97% were obtained. The phenotype’s definition of malignant STT had a sensitivity of 37%, a specificity of 96%, NPV of 96%, PPV of 40% and an accuracy of 92%. A correct diagnosis compared with histological assessment was proposed in 227(50%) of the 455 histologically confirmed cases. Despite non-quantified MR parameter evaluation, the results of our prospective study were better than those reported in previous studies and demonstrated the need for a centralized approach to such rare pathology.
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Acknowledgments
We would like to thank the coinvestigators of the Belgian Soft Tissue Neoplasm Registry (BSTNR) and the members of the pathological peer review committee. Dr. Patrick Aerts, Jean Alexiou, Michel Baeyaert, Dario Bigattini, Eric Bijnens, Isabel Biltjes, Edith Bleus, Jean Bonnet, Peter Bracke, Stefaan Brijs, Jan Broeckx, Alain Broeders, Peter Brys, Lieve Buyl, Eric Bynens, Ben Caerts, Vincent Caucheteur, Bart Claikens, Clybouw, Ilse Crevits, Bénédicte Daenen, Adelard De Backer, Frank De Belder, Christophe de Bergeyck, Luc De Beuckeleer, Y. De Breuck, Damienne de la Kethulle, Michel De Maeseneer, N. De Saint Aubain, De Surgeloose, Guy De Vriendt, Dimitri De Vuyst, Geert Debakker, Filip Deckers, Hugo Declercq, Hendrik Degryse, Johan Dehem, Piet Dekimpe, Marc Deldinne, Luc Denis, J. Desimpelaere, L. Divano, Julien Djekic, Laurent Dorthu, J. Doyen, P. Flandroy, Jan Fraeyman, Eric Fumiere, Wim Geyskens, Ghijselings, Dirk Ghysen, Grignard, M. Guffens, A. Hacourt, Ester Hauben, Evert Heindryckx, Brat Hughes, Tjeerd Jager, Marie-Anne Labaisse, Anne Lampaert, H. Lauwers, Isabelle Layalle, Marc Lemort, Bart Maes, Menno Maes, Frederic Maisse, Jacques Malghem, Sam Mampaey, Peter Matthijs, Hendrik Mertens, Eva Mortelmans, Lieven Mortelmans, Tom Mulkens, Yolande Nackaerts, Jean-François Nisolle, Jacques Olette, P. Pauwels, Johan Peeters, Dirk Perdieus, Benoït Poucet, Kristof Ramboer, Léon Rausin, Willem Roelandt, Philippe Rosoux, Frederik Rosseel, Rodrigo Salgado, Karlien Schutyzer, Patrick Seynaeve, Maryam Shahabpour, William Simoens, Philip Simons, Dana Smolders, Roel Stappaerts, Rudi Stokmans, Linus Swinnen, Carlo Thywissen, M.R. Timmermans, K. Trap, Luc Van Breuseghem, Marc Van Campenhoudt, B. Van Den Bossche, Luc Van den Hauwe, Pieter Van Dyck, Johan Van Goethem, Filip Van Grimberge, Eddy Van Hedent, Eric Van Marck, R. Van Ratthinge, Walter Van Rompaey, Christian Van Ruyssevelt, Van Tournhoudt, Bruno Vande Berg, Jan Vandevenne, Frederik Vanrietvelde, Bart Vanzieleghem, Johan Vercruysse, Huguette Vereycken, Dieter Verhulst, Frans Vermaut, Koenraad Verstraete, S. Vyt, Jan Willems, C. Ziegels.
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Gielen, J.L.M.A., De Schepper, A.M., Vanhoenacker, F. et al. Accuracy of MRI in characterization of soft tissue tumors and tumor-like lesions. A prospective study in 548 patients. Eur Radiol 14, 2320–2330 (2004). https://doi.org/10.1007/s00330-004-2431-0
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DOI: https://doi.org/10.1007/s00330-004-2431-0