BACKGROUND AND PURPOSE: Features of tumefactive demyelinating lesion (TDL) on magnetic resonance imaging (MRI) can facilitate the differential diagnosis of TDL and neoplastic lesions, but vary considerably among patients. The larger TDL grows, the more difficult it becomes to differentiate TDL from neoplastic lesions. The purpose of this study was to elucidate typical MRI features in 12 patients with large TDL (>30 mm in diameter). METHODS: We identified 12 patients with large TDL (six men, six women; age range 17-64 years, median age 27 years) and studied the clinical histories and the results of laboratory and various radiological studies in these patients. All cases of clinically definite multiple sclerosis were diagnosed in accordance with McDonald's revised criteria. RESULTS: Common MRI features of large TDLs included variable degrees of mass effect (71%) and edema (100%), a T2 hypointense rim (79%), venular enhancement (57%), and peripheral restriction on diffusion-weighted images (50%). Ring enhancement (38%), open-ring enhancement (31%), or decreased N-acetylaspartate ratios on magnetic resonance spectroscopy (22%) were less frequently observed. Brain angiography demonstrated venous dilatations on and around the TDL. CONCLUSIONS: The diagnosis of large TDL is challenging. Our findings suggest that multiple venous dilatations on and around TDLs on angiography can facilitate diagnosis.
BACKGROUND AND PURPOSE: Features of tumefactive demyelinating lesion (TDL) on magnetic resonance imaging (MRI) can facilitate the differential diagnosis of TDL and neoplastic lesions, but vary considerably among patients. The larger TDL grows, the more difficult it becomes to differentiate TDL from neoplastic lesions. The purpose of this study was to elucidate typical MRI features in 12 patients with large TDL (>30 mm in diameter). METHODS: We identified 12 patients with large TDL (six men, six women; age range 17-64 years, median age 27 years) and studied the clinical histories and the results of laboratory and various radiological studies in these patients. All cases of clinically definite multiple sclerosis were diagnosed in accordance with McDonald's revised criteria. RESULTS: Common MRI features of large TDLs included variable degrees of mass effect (71%) and edema (100%), a T2 hypointense rim (79%), venular enhancement (57%), and peripheral restriction on diffusion-weighted images (50%). Ring enhancement (38%), open-ring enhancement (31%), or decreased N-acetylaspartate ratios on magnetic resonance spectroscopy (22%) were less frequently observed. Brain angiography demonstrated venous dilatations on and around the TDL. CONCLUSIONS: The diagnosis of large TDL is challenging. Our findings suggest that multiple venous dilatations on and around TDLs on angiography can facilitate diagnosis.
Authors: A Siri; Clarisse Carra-Dalliere; X Ayrignac; J Pelletier; B Audoin; S Pittion-Vouyovitch; M Debouverie; C Lionnet; F Viala; D Sablot; D Brassat; J-C Ouallet; A Ruet; B Brochet; L Taillandier; L Bauchet; N Derache; G Defer; P Cabre; J de Seze; C Lebrun Frenay; M Cohen; P Labauge Journal: J Neurol Date: 2015-05-01 Impact factor: 4.849
Authors: Rocco Totaro; C Di Carmine; A Splendiani; S Torlone; L Patriarca; C Carrocci; S Sciamanna; C Marini; A Carolei Journal: Neurol Sci Date: 2016-04-15 Impact factor: 3.307
Authors: Mirja Wallner-Blazek; Alex Rovira; Massimo Fillipp; Mara A Rocca; David H Miller; Klaus Schmierer; Jette Frederiksen; Achim Gass; Hugo Gama; Charles P Tilbery; Antonio J Rocha; José Flores; Frederik Barkhof; Alexandra Seewann; Jacqueline Palace; Tarek Yousry; Xavier Montalban; Christian Enzinger; Franz Fazekas Journal: J Neurol Date: 2013-04-26 Impact factor: 4.849
Authors: L H Verhey; H M Branson; S Laughlin; M M Shroff; S M Benseler; B M Feldman; D L Streiner; J G Sled; B Banwell Journal: AJNR Am J Neuroradiol Date: 2013-01-24 Impact factor: 3.825