Serial MR imaging and 1H-MR spectroscopy of unidentified bright objects in a case of neurofibromatosis type 1.

Brain Dev 2005 Dec;27(8):595-7

Department of Pediatrics, Gifu Prefectural Gifu Hospital, 4-6-1 Noishiki, Gifu 500-8717, Japan.

Serial study using MR imaging and 1H-MR spectroscopy (1H-MRS) of unidentified bright objects (UBO) in a 9-year-old boy with neurofibromatosis type 1 (NF1) is described. UBO was indicated in the left globus pallidum at 3 years old, then appeared in the right globus pallidum at 5 years old along with left hemiconvulsion. These UBO gradually disappeared over several years. On 1H-MRS, the ratios of N-acetylaspartate (NAA)/creatine and that of choline/creatine were each mildly reduced in the UBO. These ratios improved in parallel with disappearance of the UBO. In addition, elevation of the lactate/lipid peak was shown in UBO during the early stage, however, it disappeared in the latter. The longitudinal follow-up using MR image and 1H-MRS was useful for metabolic evaluation of UBO in patients with NF1.

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http://dx.doi.org/10.1016/j.braindev.2005.02.008DOI Listing
December 2005
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