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Abstract

Usefulness of contrast material in MR of patients with neurofibromatosis type 1.

C Bonawitz, M Castillo, C T Chin, S K Mukherji and A J Barkovich
American Journal of Neuroradiology March 1998, 19 (3) 541-546;
C Bonawitz
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M Castillo
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C T Chin
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S K Mukherji
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A J Barkovich
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Abstract

PURPOSE Our objective was to determine the usefulness of routine administration of contrast material in brain MR imaging for the evaluation of areas of probable myelin vacuolization and neoplasms in patients with neurofibromatosis type 1 (NF-1).

METHODS We retrospectively reviewed 112 consecutive contrast-enhanced brain MR studies obtained over a period of 7 years in 109 symptomatic and asymptomatic patients compiled from two institutional NF-1 data bases. MR studies were analyzed for areas of probable myelin vacuolization, with attention to degree of enhancement and its impact on lesion detection and characterization. Usefulness of contrast material was graded as 0 = not useful, 1+ = somewhat useful, and 2+ = useful.

RESULTS Of 112 studies, 45% (n = 49) were normal. In the remaining 63 studies, 88 regions of probable myelin vacuolization and 52 tumors were identified. Enhancement was not observed in any regions of probable myelin vacuolization. Enhancement was present in 31% of tumors, and, of these, was found to be useful in 44%, somewhat useful in 12%, and not useful in 44%. For enhancing tumors, contrast agent was useful for lesion detection in 19% and for lesion characterization in 25%.

CONCLUSION Contrast administration is useful in baseline MR studies to maximize tumor detection and characterization, to add confidence to the diagnosis of benign probable myelin vacuolization, and to document stability of neoplasms on follow-up examinations.

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American Journal of Neuroradiology
Vol. 19, Issue 3
1 Mar 1998
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Usefulness of contrast material in MR of patients with neurofibromatosis type 1.
C Bonawitz, M Castillo, C T Chin, S K Mukherji, A J Barkovich
American Journal of Neuroradiology Mar 1998, 19 (3) 541-546;

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Usefulness of contrast material in MR of patients with neurofibromatosis type 1.
C Bonawitz, M Castillo, C T Chin, S K Mukherji, A J Barkovich
American Journal of Neuroradiology Mar 1998, 19 (3) 541-546;
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