case_images: PMC4876204_01
case_images: Findings: unenhanced axial brain CT depicts hyperdense striatum (caudate nucleus and putamen). This finding is better seen using narrow window width and higher center settings.
case_images: CRIRA2016-5727138.001.jpg
case_images: PMC4876204_01_CRIRA2016-5727138.001.jpg
case_images: fig1
case_images: Using narrow window width and slightly higher center settings better depicted this finding (Figure 1).
case_images: Axial T1-weighted sequence depicts right basal ganglia hyperintensity with unremarkable signal abnormality on axial T2-weighted.
case_images: CRIRA2016-5727138.002.jpg
case_images: PMC4876204_01_CRIRA2016-5727138.002.jpg
case_images: fig2
case_images: T1-weighted sequences and fairly normal signal intensity on T2-weighted and FLAIR sequences (Figure 2). The apparent diffusion coefficients (ADCs) were slightly lower in right basal ganglia compared to those on the left side.
case_images: ADC map shows slight decreased apparent diffusion coefficient in right basal ganglia. Symmetrical normal ADC values one month later.
case_images: CRIRA2016-5727138.003.jpg
case_images: PMC4876204_01_CRIRA2016-5727138.003.jpg
case_images: fig3
case_images: ADC values were symmetrical on both basal ganglia (Figure 3).
case_images: Striking increase of T1-weighted signal intensity within right striatum one month after the onset of symptoms. Patient was asymptomatic when this MR study was performed.
case_images: CRIRA2016-5727138.004.jpg
case_images: PMC4876204_01_CRIRA2016-5727138.004.jpg
case_images: fig4
case_images: Axial T2 gradient echo sequence shows no signal abnormality within right striatum but some scattered blooming artifacts within left thalami consistent with petechial hemorrhages.
case_images: CRIRA2016-5727138.005.jpg
case_images: PMC4876204_01_CRIRA2016-5727138.005.jpg
case_images: fig5
case_images: Both MR studies performed with one month difference did not show any abnormality within right striatum on T2 gradient echo sequences (Figure 5).
case_images: Axial minimum intensity projection of susceptibility weighted imaging at 10-month follow-up depicts slightly hypointense signal within right striatum.
case_images: CRIRA2016-5727138.006.jpg
case_images: PMC4876204_01_CRIRA2016-5727138.006.jpg
case_images: fig6
case_images: However, a 10-month follow-up MR scan showed hypointensity within right striatum on susceptibility weighted images (SWI) (Figure 6).
case_images: 4-month and 10-month follow-up MR studies. Sagittal T1 depicts persistent hyperintensity within right striatum (green arrow), whereas a 10-month follow-up MR shows complete regression of signal abnormalities.
case_images: CRIRA2016-5727138.007.jpg
case_images: PMC4876204_01_CRIRA2016-5727138.007.jpg
case_images: fig7
case_images: No signs of striatum atrophy were shown (Figure 7).