Snowman sign (pituitary macroadenoma)

Dr Bahman Rasuli and Dr Bruno Di Muzio et al.

Snowman sign in neuroimaging refers to the configuration of many pituitary macroadenomas. As they are soft tumors they are indented by the diaphragma sellae giving them a snowman configuration (or "figure 8" or "dumbbell" configuration). This feature helps in differentiating these tumors from meningiomas extending into the pituitary fossa.

See also

Inspired signs

Article information

rID: 38698
Section: Signs
Synonyms or Alternate Spellings:
  • Snowman sign in pituitary macroadenomas

ADVERTISEMENT: Supporters see fewer/no ads

Cases and figures

  • Case 1
    Drag here to reorder.
  • Case 2
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.