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Case 10: Neurocysticercosis¹

¹ From the Department of Magnetic Resonance Imaging, New York University Medical Center, 530 First Ave, New York, NY 10016. Received March 2, 1998; revision requested April 16; revision received July 22; accepted August 17. Address reprint requests to A.W.L.

View larger version (135K): [in a new window]   Figure 1a. (a) Postcontrast axial T1-weighted spin-echo MR image (600/14 [repetition time msec/echo time msec], 5-mm section thickness, 250-mm field of view, 250 x 256 matrix, acquisition time of 4 minutes 9 seconds) shows a 1-cm mass with ring enhancement (long arrow), slightly thickened posteriorly (short arrow), at the corticomedullary junction in the right frontal lobe. The center of the lesion is mildly hypointense to white matter. A small amount of decreased signal intensity in adjacent white matter represents vasogenic edema (arrowhead). (b) Corresponding axial T2-weighted turbo spin-echo MR image (3,400/119, 5-mm section thickness, 250-mm field of view, 250 x 256 matrix, acquisition time of 2 minutes 58 seconds) shows a well-defined, thin, hypointense capsule (long arrow) with posterior thickening (short arrow). The center of the lesion is hyperintense. Vasogenic edema (arrowhead) is clearly depicted.

View larger version (138K): [in a new window]   Figure 1b. (a) Postcontrast axial T1-weighted spin-echo MR image (600/14 [repetition time msec/echo time msec], 5-mm section thickness, 250-mm field of view, 250 x 256 matrix, acquisition time of 4 minutes 9 seconds) shows a 1-cm mass with ring enhancement (long arrow), slightly thickened posteriorly (short arrow), at the corticomedullary junction in the right frontal lobe. The center of the lesion is mildly hypointense to white matter. A small amount of decreased signal intensity in adjacent white matter represents vasogenic edema (arrowhead). (b) Corresponding axial T2-weighted turbo spin-echo MR image (3,400/119, 5-mm section thickness, 250-mm field of view, 250 x 256 matrix, acquisition time of 2 minutes 58 seconds) shows a well-defined, thin, hypointense capsule (long arrow) with posterior thickening (short arrow). The center of the lesion is hyperintense. Vasogenic edema (arrowhead) is clearly depicted.

View larger version (107K): [in a new window]   Figure 2. Postcontrast axial CT scan also shows thin, regular ring enhancement (long arrow). A discrete mural nodule (short arrow) enhances along the posterior aspect of the capsule. Subtle edema is present (arrowhead).

View larger version (84K): [in a new window]   Figure 3. Color overlay on a T2*-weighted echo-planar MR image (0.8/54; 90° flip angle; 5-mm section thickness; 215-mm field of view; 128 x 128 matrix; acquisition time of 1 minute, seven sections, 60 measures) shows no demonstrable perfusion abnormality in the underlying region of increased T2 signal intensity and reflects the perilesional edema (arrowhead). The color overlay image has a threshold to depict normal cortical perfusion as green (arrow).