Article Figures & Data
Figures
- Fig 1.
Axial view MR images of a 41-year-old male patient with leptomeningeal metastases from laryngeal squamous cell carcinoma.
A, Unenhanced FLAIR image (10,000/147; inversion time, 2200 ms) shows diffuse abnormal signal intensity in the subarachnoid space (arrowhead).
B, Contrast-enhanced FLAIR image (10,000/147; inversion time, 2200 ms) shows diffuse abnormal signal intensity in the subarachnoid space (arrowheads).
C, Contrast-enhanced T1-weighted MR image (600/8) is falsely negative. Parenchymal metastasis is also identified (arrow).
- Fig 2.
Axial view MR images of a 59-year-old male patient with leptomeningeal metastases from ependymoma.
A, Unenhanced FLAIR image (10,000/147; inversion time, 2200 ms) appears unremarkable.
B, Contrast-enhanced FLAIR image (10,000/147; inversion time, 2200 ms) appears unremarkable.
C, Contrast-enhanced T1-weighted MR image (600/8) shows enhancement along the surface of the midbrain (arrowheads). Thickened, enhancing dura is also identified on the contrast-enhanced images.
- Fig 3.
Axial view MR images of a 26-year-old male patient with leptomeningeal metastases from leukemia.
A, Unenhanced FLAIR image (10,000/147; inversion time, 2200 ms) is negative.
B, Contrast-enhanced FLAIR image (10,000/147; inversion time, 2200 ms) is negative.
C, Contrast-enhanced T1-weighted MR image (600/8) shows enhancement along the superior surface of the cerebellum (arrows). Artifact is noted in the right temporal and occipital lobes.
Tables
Imaging Technique Unenhanced FLAIR Contrast-enhanced T1-weighted MR Contrast-enhanced FLAIR Positive 2 10 7 Negative 15 7 10 Sensitivity 12% (2/17) 59% (10/17) 41% (7/17) Note.—FLAIR indicates fluid-attenuated inversion recovery.
Imaging Technique Unenhanced FLAIR Contrast-enhanced T1-weighted MR Contrast-enhanced FLAIR Negative 53 53 50 Positive 4 4 7 Specificity 93% (53/57) 93% (53/57) 88% (50/57) Note.—FLAIR indicates fluid-attenuated inversion recovery.
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