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  Indian J Med Microbiol
 

Figure 5: A 2-year-old boy who presented with signs of increased intra cranial pressure and cerebellar manifestations; an infratentorial left cerebellar space-occupying lesion can be seen compressing the fourth ventricle with consequent active moderate obstructive hydrocephalus and mild contralateral midline shift. (a, b) Axial T2W and T1 GAD images: the lesion displayed heterogeneous hyperintensity with intense heterogeneous enhancement after contrast administration. (c, d) Axial diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC) map image: the bulk of the lesion showed evident diffusion restriction, being hyperintense on DWI and strikingly hypointense on ADC images (ADC value measured 0.5 × 10-3 mm2/s). Collectively the findings are consistent with a high-grade neoplastic lesion, likely medulloblastoma; histopathological examination confirmed the diagnosis WHO GIV medulloblastoma.

Figure 5: A 2-year-old boy who presented with signs of increased intra cranial pressure and cerebellar manifestations; an infratentorial left cerebellar space-occupying lesion can be seen compressing the fourth ventricle with consequent active moderate obstructive hydrocephalus and mild contralateral midline shift. (a, b) Axial T2W and T1 GAD images: the lesion displayed heterogeneous hyperintensity with intense heterogeneous enhancement after contrast administration. (c, d) Axial diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC) map image: the bulk of the lesion showed evident diffusion restriction, being hyperintense on DWI and strikingly hypointense on ADC images (ADC value measured 0.5 × 10-3 mm2/s). Collectively the findings are consistent with a high-grade neoplastic lesion, likely medulloblastoma; histopathological examination confirmed the diagnosis WHO GIV medulloblastoma.