Rasmussen encephalitis (RE) is regarded as a unihemispheric disease. Serial three-dimensional MRIs of 18 patients under immunotherapy were analyzed volumetrically and planimetrically. Median volume loss was significantly higher in the affected than in the unaffected hemispheres (29.9 cm3/y vs 6.8 cm3/y). Correlation of the planimetrically and volumetrically assessed hemispheric ratios (HRs) was significant. The results support the concept of RE as a basically unilateral disease. Planimetric HR assessment is valid and time efficient.
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茂 et al. (2005) studied this question.
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