Taller than wider

Hypoechoic taller than wider nodule with irregular margins. 

Isoechoic taller than wider nodule with partial halo.

Hypoechoic taller than wider nodule with irregular margins. 

Halo

Isoechoic to hyperechoic nodule with halo around it.

Isoechoic nodule with halo around it.

Irregular margins

Heternogenous nodule with irregular margin, lobulations (red arrow) with extrathyroidal extension (white arrow) and microcalcifications. 

Hypoechoic nodule with irregular margins

Microcalcifications

Heterogenous nodule with microcalcifications (white arrows)

Multiple microcalcifications (red arrows)

Colloid

Hyperchoic lesions that lloks like comet tails (red arrows) represents colloid.

Intra nodular flow

Isoechoic nodule with perinodal and intranodal doppler flow. 

Thyroid inferno. Marked intravascular flow seen in a Graves thyroid nodule.

Extrathyroidal extension

Red arrows shows extrathyroidal extension. Yellow arrows shows microcalcifications.

Red arrow indicate extrathyroidal extension. Green arrow points towards clusters of micrcalcifications.

Abnormal lymph nodes

Lymph nodes with heterogenous content, irregular margins, calcifications and without hilum.

7 cm lymph node with cystic degeneration, calcifications and internal doppler flow.

Matted lymph nodes with irregular margins,cystic degeneration, calcifications and lack of hilum.