Small Saphenous Vein at Knee

vena saphena parva (pars genus)

The small saphenous vein ascends the posterior calf and typically terminates by joining the popliteal vein at the saphenopopliteal junction in the popliteal fossa, at a variable level between 0-5 cm above the popliteal crease. Its level of entry into the popliteal vein must be mapped by duplex ultrasound before treatment.

Region: Knee

Clinical Relevance

Clinical Notes

The saphenopopliteal junction is the primary target in endovenous treatment of small saphenous varicosities. Its variable junction level (high, mid, or low in the popliteal fossa) requires pre-operative duplex mapping for accurate catheter placement. The sural nerve runs adjacent to the small saphenous vein in the posterior leg and is at risk during stripping procedures. Giacomini's vein connects the small saphenous to the great saphenous vein across the posterior thigh.

Pathology

Common Injuries & Conditions

Small Saphenous Reflux

Valve incompetence at the saphenopopliteal junction producing posterior calf and popliteal varicosities, mapped by duplex ultrasound for accurate endovenous ablation targeting the junction.