Fig. 2

Three representative cases of bloomy rind sign. Although no abnormalities are seen on the brainstem on GdCE T1-weighted images, FLAIR images show hyperintensity along the brainstem surface in all three cases. Figure 2a and c show FLAIR hyperintensity on the antero-lateral surface of the pons, and Fig. 2b shows it along the antero-lateral cerebellar peduncle. DW images show restricted diffusion at the same lesions of two patients. DW images are not available for the third patient. Two patients (Figs. a and c) had positive CSF cytology, but one (Fig. b) did not undergo CSF examination because of neurological signs and restricted enhancement in the internal acoustic canals on GdCE images