MR Imaging Features of Nipah Encephalitis
Sazilah Ahmad Sarji1,
Basri Johan Jeet Abdullah1,
Khean Jin Goh2,
Chong Tin Tan2 and
Kum Thong Wong3
1
Department of Radiology, University of Malaya Medical Center, Jalan
Universiti, 59100 Kuala Lumpur, Malaysia.
2
Department of Medicine, University of Malaya Medical Center, Jalan Universiti,
59100 Kuala Lumpur, Malaysia.
3
Department of Pathology, University of Malaya Medical Center, Jalan
Universiti, 59100 Kuala Lumpur, Malaysia.

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Fig. 1. 44-year-old man with acute Nipah encephalitis. Axial fluid
attenuated inversion recovery MR image shows multiple discrete lesions in
subcortical and deep white matter of cerebrum.
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Fig. 2. 53-year-old man with acute Nipah encephalitis. Axial fluid
attenuated inversion recovery MR image shows disseminated discrete round
lesions in white matter.
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Fig. 3. 26-year-old man with early Nipah encephalitis. Axial fluid
attenuated inversion recovery MR image shows subcortical lesion, which appears
as strip in early Nipah encephalitis (arrowhead).
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Fig. 4. 45-year-old patient with acute Nipah encephalitis. Axial fluid
attenuated inversion recovery MR image shows lesions in gray matter
(arrowheads).
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Fig. 5A. 40-year-old woman in the later phase of acute Nipah encephalitis.
T1-weighted (A) and T2-weighted (B) spin-echo MR images show
discrete round lesions with MR signal of old blood products.
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Fig. 5B. 40-year-old woman in the later phase of acute Nipah encephalitis.
T1-weighted (A) and T2-weighted (B) spin-echo MR images show
discrete round lesions with MR signal of old blood products.
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Fig. 6. 40-year-old man with acute Nipah encephalitis. Fluid attenuated
inversion recovery MR image shows confluent involvement of temporal lobe
(arrowhead).
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Fig. 7A. 28-year-old man with relapsed Nipah encephalitis. Fluid attenuated
inversion recovery MR images through parietal lobes (A) and temporal
lobes (B) show confluent cortical involvement.
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Fig. 7B. 28-year-old man with relapsed Nipah encephalitis. Fluid attenuated
inversion recovery MR images through parietal lobes (A) and temporal
lobes (B) show confluent cortical involvement.
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Fig. 8A. 33-year-old man with relapsed Nipah encephalitis. Axial (A)
and coronal (B) MR images show distinct feature of confluent gray
matter involvement, well seen on fluid attenuated inversion recovery
sequence.
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Fig. 8B. 33-year-old man with relapsed Nipah encephalitis. Axial (A)
and coronal (B) MR images show distinct feature of confluent gray
matter involvement, well seen on fluid attenuated inversion recovery
sequence.
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Fig. 9A. 31-year-old woman with late-onset Nipah encephalitis. Axial
(A) and coronal (B) fluid attenuated MR images show confluent
cortical involvement, similar to that seen in patient with relapsed Nipah
encephalitis, in right frontal lobe.
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Fig. 9B. 31-year-old woman with late-onset Nipah encephalitis. Axial
(A) and coronal (B) fluid attenuated MR images show confluent
cortical involvement, similar to that seen in patient with relapsed Nipah
encephalitis, in right frontal lobe.
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