fig 3.

A, Axial T2-weighted image obtained at the time of the third hospitalization (2 days after the onset of symptoms).

B, Diffusion-weighted image reveals a cortical hyperintense lesion in the right occipital lobe.

C, ^99mTc-HMPAO SPECT scan obtained on the same day shows a remarkable increase in tracer accumulation in the right occipital cortex. Follow-up MR images obtained 2 weeks later (not shown) revealed resolution of the right occipital abnormality, and SPECT scans obtained 16 days after the onset of symptoms (not shown) showed a normal accumulation in the right occipital cortex.