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FIG 1. A, Coronal multiplanar reconstruction (MPR) of the MPR sequence (9.7/4/12/160/1 [TR/TE/flip angle/partitions/slice thickness in mm]), control 1 year after surgery, showing regredient hydrocephalus and solid and more "tiger-striped" components of the mass. Note periventricular nodular heterotopia. A 1.5-T scanner (Magnetom Vision; Siemens, Erlangen, Germany) with a standard gradient system (25mT/m, 600 µs risetime) and a circular polarized head coil was used.
B, Apparent diffusion coefficient (ADC) map of the Lhermitte-Duclos disease (LDD) after surgery shows no disturbance of diffusion within the lesion. The resection margin is detectable. High-speed multislice diffusion imaging was performed using echo-planar diffusion-weighted imaging (0.8/123 [TR/TE]) with b values of 50, 500, and 1000. ADC maps were calculated to quantify areas of low diffusion.
C, Histologic analysis of LDD (hematoxylin and eosin staining, magnification x430) shows high density of small vessels within the lesion and dysplastic Purkinje cells
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