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. 2012 Nov;33(10):1932–1938. doi: 10.3174/ajnr.A3081

Fig 1.

Fig 1.

Typical MR imaging signs of type 2 FCD. Coronal 3D T1WI (A), coronal FLAIR (B), and coronal T2WI (C) in a 45-year-old man with left motor seizures, epilepsy onset at 6 years, and findings on several previous MR images considered normal. An unusually deep and straight sulcus in the precentral region (asterisk), with minimal cortical thickening at the bottom of the sulcus, and cortical signal increase in T2WI and FLAIR. Abnormal subcortical signal, marked at the bottom (arrow), surrounded by an area of subtle signal increase (arrowheads), responsible for a gradient of signal abnormalities from the periphery to the center of the dysplasia. Barely perceptible transmantle sign (C, double arrows). Coronal FLAIR (D) and magnification (E) of the left central region in a 19-year-old woman with right motor seizure, epilepsy onset at 16 years of age. These MR images show a marked increased signal, tapering gradually from the gray-white matter interface to the superolateral edge of the lateral ventricle (triple arrows), typical of a transmantle sign.