RT Journal Article SR Electronic T1 MR Diffusion Tensor Imaging, Fiber Tracking, and Single-Voxel Spectroscopy Findings in an Unusual MELAS Case JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1840 OP 1844 VO 26 IS 7 A1 Denis Ducreux A1 Ghaidaa Nasser A1 Catherine Lacroix A1 David Adams A1 Pierre Lasjaunias YR 2005 UL http://www.ajnr.org/content/26/7/1840.abstract AB Summary: A 23-year-old man was admitted to the intensive care unit for respiratory failure, global lower and upper limb palsy, and higher cognitive function deterioration. Imaging, performed with a combination of the MR diffusion tensor imaging, fiber tracking, and MR spectroscopy, suggested the diagnosis of an acute severe unusual mitochondrial encephalopathy, lactic acidosis, and strokelike event, which was confirmed by muscle biopsy, but fiber tracking showed unexpected unaltered white matter tracts.