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Fast spin-echo (3600/95) MR image shows HPE of moderate severity, classified as more dysplastic semilobar HPE. The anteriormost portion of the cerebrum appears to be a single continuous sylvian fissure. This fissure appears to be composed of the posterior halves of two sylvian fissures, with bilateral posterior opercula (arrows) forming the lateral borders, as if the anterior halves of the fissures had never formed and the posterior halves merged together.
