PMC6881771_01
The right unirhinal PEA threshold was -1.
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fig1
After treatment, his birhinal and unirhinal PEA thresholds had remained at -1 (Figure 1).
MRI shows irregular hyperintensity over bilateral rectus gyri, with extensive tissue loss at the left frontal base. The sizes of the right olfactory bulb (red arrow) and tract were relatively small.
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fig2
The sizes of the right olfactory bulb and tract were relatively small (Figure 2).
(a) No tracer accumulated at the right olfactory bulb (red arrow) on the 30 minute images. (b) No tracer accumulated at the right olfactory bulb (red arrow) on the 24 hour images.
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fig3
The tracer did not accumulate at the right olfactory bulb on the 30 minute images, as well as the 24 hour images (Figure 3).
The right unirhinal PEA threshold was -1.375.
CRIOT2019-1069741.004.jpg
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fig4
One month later, his birhinal PEA threshold was -3.625 and right unirhinal threshold was -1.35, but left unirhinal threshold remained at -1 (Figure 4).
MRI shows that the right olfactory bulb (red arrow) became larger.
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fig5
The MRI revealed a relatively large right olfactory bulb, as compared with the previous MRI (Figure 5).
(a) Increased tracer accumulated at the right olfactory bulb (red arrow) on the 30 minute images. (b) Increased tracer accumulated at the right olfactory bulb (red arrow) on the 24 hour images.
CRIOT2019-1069741.006.jpg
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fig6
The 201Tl olfacto-scintigraphy demonstrated increased trace accumulation at the right frontal bulb on both the 30 minute and 24 hour images (Figure 6).