Sonographic halo sign (disambiguation)

Sonographic halo sign can be useful in a number of situations:

• hypoechoic halo sign (also known as target or bull's eye sign) in liver metastases: used in hepatobiliary imaging, is a concerning feature for malignant lesion if the lesion is a hyperechoic liver lesion ^1,2

• ultrasound halo in angiolymphoid hyperplasia with eosinophilia (ALHE): used when interpreting the temporal artery ³

• periluminal hypoechogenic halo in giant cell arteritis (temporal arteritis): used when interpreting the superficial temporal artery, reflective of arterial wall edema ⁴

  • the same sign has also been described in interpreting the vertebral artery in giant cell arteritis ⁵

See also

• halo sign in mammography

• halo sign in CT chest imaging

• fat halo sign in abdominal CT imaging