Giacomini vein

Dr Henry Knipe and Dr Yuranga Weerakkody et al.

The Giacomini vein or thigh extension of the small saphenous vein refers to a variation in lower limb venous anatomy where the small saphenous vein (SSV) continues through to the thigh as a distinct branch.

The persistence of this vein may play a contributory role in the development of chronic venous disease. It is, therefore, an important vein to assess in Duplex venous ultrasound assessment of the lower limb. 


Its reported prevalence in some form or another may ~75% in the general population 4,5.

History and etymology

It is named after Dr Carlo Giacomini, later Professor of Anatomy at the University of Turin, Italy, who presented a thesis on superficial and deep lower limb venous anatomy in July 1873 3.

Anatomy: Lower limb
Share article

Article information

rID: 21624
System: Vascular
Section: Anatomy
Synonyms or Alternate Spellings:
  • Vein of Giacomini
  • Thigh extension of long saphenous vein
  • Giacomini continuation
  • Giacomini veins

Support Radiopaedia and see fewer ads

Updating… Please wait.

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

 Thank you for updating your details.