Pyramidal lobe of thyroid

The pyramidal lobe of thyroid is a normal variant. It is seen as a third thyroid lobe and is present in 10-30% of the population.

It is likely related to a remnant of the thyroglossal duct. It usually arises from the isthmus upwards along the midline or is shifted towards the left of the neck, and is usually located anterior to the thyroid cartilage. It can be involved in any diffuse thyroid parenchymal disease.

It is not uncommon to see it on routine thyroid ultrasound.

All the pathologies that may be seen in the normal thyroid are also seen in the pyramidal lobe.

Head and neck anatomy
Share article

Article information

rID: 36922
System: Head & Neck
Section: Anatomy
Tag: variant
Synonyms or Alternate Spellings:
  • Pyramidal lobe of the thyroid gland
  • Pyramidal lobe of the thyroid
  • Pyramidal lobe of thyroid gland

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Figure 1: diagram
    Drag here to reorder.
  • Drag
    Case 1
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

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

    Alert accept Thank you for updating your details.