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Frontotemporal lobar degeneration. (a) Coronal 18F-FDG PET image at the level of the anterior temporal lobes shows markedly decreased temporal lobe uptake. I = inferior, S = superior. (b, c) Coronal (b) and axial (c) T1-weighted MR images show severe bilateral temporal lobe atrophy. (d) Axial MR image at the level of the temporal lobes obtained 5 years earlier demonstrates the significant progressive atrophy in this patient.
