Dejan Kostic1,2, Evica Dincic2,3, Aleksandar Jovanovski1, Smiljana Kostic2,3, Nemanja Rancic4,5, Biljana Georgievski-Brkic6, Miroslav Misovic1,2, Katarina Koprivsek7. 1. Institute of Radiology, Military Medical Academy, Belgrade, Serbia. 2. Faculty of Medicine of the Military Medical Academy, University of Defence, Belgrade, Serbia. 3. Clinic for Neurology, Military Medical Academy, Belgrade, Serbia. 4. Institute of Radiology, Military Medical Academy, Belgrade, Serbia. nece84@hotmail.com. 5. Faculty of Medicine of the Military Medical Academy, University of Defence, Belgrade, Serbia. nece84@hotmail.com. 6. Special Hospital for Cerebrovascular Diseases "Sveti Sava", Belgrade, Serbia. 7. MRI Unit, Institute for Children and Adolescents Health Care of Vojvodina, Medical Faculty, University of Novi Sad, Novi Sad, Serbia.
Abstract
OBJECTIVE: Gadolinium-enhanced T1-weighted lesions are a well-established marker of areas with acute inflammatory activity. A majority of these gadolinium-enhanced T1 lesions are isointense relative to the surrounding white matter, but 20-40% of such active lesions will evolve during one year into areas of low signal ("black hole"). This study sought to characterize evolution of "black hole" lesions in patients with relapsing-remitting multiple sclerosis (MS) using the magnetic resonance imaging (MRI), which measures active lesions via the count of new or enlarged T2 and gadolinium-enhanced T1-weighted lesions. MATERIALS AND METHODS: This was a prospective, observational case-series study which utilized pre- and post-gadolinium contrast T1-weighted and Proton density MRI scans. Twenty-nine patients (8 males and 21 females) with average age of 38.86 ± 6.58 years and disease duration of 5.75 ± 7.00 years were used to analyze 196 acute demyelinating plaques detected on MRI images during the 24-month follow-up of post-gadolinium signal intensity enhancement of MS plaques. RESULTS: Significant difference in black hole development was found between the shapes of acute and chronic "black holes". Ring-shaped and patchy plaques were 4.09 (1.87-8.91) times more likely and 1.49 (0.71-3.12) times less likely to develop an acute "black holes" than homogeneous plaques, respectively. Acute plaques with higher lesion-to-CSF SI ratio and larger surface area showed a greater tendency to develop into acute and chronic "black holes". CONCLUSIONS: The value of lesion-to-CSF SI ratio and surface area were found as the predictors of the "black hole" formation.
OBJECTIVE: Gadolinium-enhanced T1-weighted lesions are a well-established marker of areas with acute inflammatory activity. A majority of these gadolinium-enhanced T1 lesions are isointense relative to the surrounding white matter, but 20-40% of such active lesions will evolve during one year into areas of low signal ("black hole"). This study sought to characterize evolution of "black hole" lesions in patients with relapsing-remitting multiple sclerosis (MS) using the magnetic resonance imaging (MRI), which measures active lesions via the count of new or enlarged T2 and gadolinium-enhanced T1-weighted lesions. MATERIALS AND METHODS: This was a prospective, observational case-series study which utilized pre- and post-gadolinium contrast T1-weighted and Proton density MRI scans. Twenty-nine patients (8 males and 21 females) with average age of 38.86 ± 6.58 years and disease duration of 5.75 ± 7.00 years were used to analyze 196 acute demyelinating plaques detected on MRI images during the 24-month follow-up of post-gadolinium signal intensity enhancement of MS plaques. RESULTS: Significant difference in black hole development was found between the shapes of acute and chronic "black holes". Ring-shaped and patchy plaques were 4.09 (1.87-8.91) times more likely and 1.49 (0.71-3.12) times less likely to develop an acute "black holes" than homogeneous plaques, respectively. Acute plaques with higher lesion-to-CSF SI ratio and larger surface area showed a greater tendency to develop into acute and chronic "black holes". CONCLUSIONS: The value of lesion-to-CSF SI ratio and surface area were found as the predictors of the "black hole" formation.
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Authors: I J van den Elskamp; J Lembcke; V Dattola; K Beckmann; C Pohl; W Hong; R Sandbrink; K Wagner; D L Knol; B Uitdehaag; F Barkhof Journal: Mult Scler Date: 2008-07 Impact factor: 6.312
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