The halo sign and vascular patterns of nodules - Table 1 (large). Typical presentations

We demonstrate the various forms of vascular patterns in thyroid nodules.

Benign, hyperplastic nodules (histology) - case conp 049

None of the nodules shows either vascularization or halo sign.
   
Follicular cancer (histology) - case 2222

The nodule has halo and presents neither perinodular nor intranodular vascularity.

Oxyphilic adenoma (histology) - case 60

The nodule does not show halo sign but displays perinodular blood flow.
   
Follicular cancer (histology) - case 2221

The nodule has a complete halo and presents perinodular blood flow at around 50% of its circumference.

   
Poorly differentiated insular cancer (histology) - case 738

The nodule has no halo and shows an irregularly increased intranodular vascularization.
   
Papillary cancer (histology) - case conp 049

The nodule has no halo. The presence of perinodular vascularization is doubtful while the intranodular vascularity is minimal.
   
Papillary cancer (cytology) - case 2254

The nodule has not halo. The intranodular vascularization is substantially increased.
   
Benign follicular proliferation (cytology) - case 2249
Transverse scan
Longitudinal scan

The presence of halo is doubtful. The intranodular vascularization is irregularly increased.