Molecular Imaging 2017

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Nodal Assessment
Involvement based on:
 Size (short axis)
 Mesorectal ≥5mm:
Sens 81%, Spec 68% (vs 3% &
100% for ≥10mm)
 Internal iliac: ≥8mm
 Other nodes ≥10mm
 Morphology:
 Mixed signal characteristics
 Irregular border
Sensitivity 85%, Specificity 97%*
*Brown et al. Radiology 2003;227:371-377
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