PMC6837833_01
Axial FLAIR image of the patient discussed in Case 1, at the level of the pons demonstrating high-signal in the entire pons and part of the left cerebellar hemisphere. Images at a lower level (not shown) demonstrated more extensive involvement of the left cerebellum.
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F0001
T2-weighted and FLAIR sequences in the left cerebellar hemisphere, pons and midbrain (Figure 1).
PMC6837833_02
Sagittal pre-(a) and post-contrast (b) T1W images of the patient discussed in Case 2 at the level of the right cerebellar hemisphere demonstrating low signal intensity in the cerebellum with enhancement in the same region post-contrast administration.
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F0002
MRI was requested, which showed multiple high-signal changes on T2-weighted imaging involving the pons and right cerebellar hemisphere with some enhancement post contrast (Figure 2).
PMC6837833_03
Coronal T2 weighted image of the patient discussed in Case 3, showing high-signal in both cerebellar hemispheres with greater involvement of the right hemisphere.
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F0003
T2-weighted and FLAIR images bilaterally in the cerebellar hemispheres with the right more involved compared with the left (Figure 3).
PMC6837833_04
Axial T2 weighted image of the patient discussed in Case 4, at the level of the cerebellar pontine angles demonstrating confluent high-signal changes in both cerebellar hemispheres and patchy changes in the pons.
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F0004
T2-weighted and FLAIR sequences with patchy changes in the brainstem (Figure 4). The patient was advised regarding antiretroviral therapy (ART) and was discharged.
PMC6837833_05
Axial (a) pre- and (b) post-contrast CT scan of the patient discussed in Case 5, demonstrating low density in the left cerebellar hemisphere with no contrast enhancement of the lesion.
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F0005
CSF. CT scan demonstrated low density in the left cerebellar hemisphere, which did not enhance on the post contrast imaging (Figure 5).
PMC6837833_06
Axial T2 weighted image of the patient in Case 6, showing high-signal changes in the right cerebellum and cerebellar peduncle.
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F0006
CT showed low density area in the right cerebellar hemisphere, which was shown on MRI to extend into the right cerebellar peduncle, pons and medulla (Figure 6).