The great saphenous vein (GSV) drains into the femoral vein at the saphenofemoral junction. Its surface marking for this junction is:

• A 4 cm below and lateral to the pubic tubercle
• B 4 cm below and medial to the pubic tubercle ✓
• C At the midpoint of the inguinal ligament
• D At the crossing of the adductor longus tendon

Explanation

The saphenofemoral junction (SFJ), where the great saphenous vein perforates the cribriform fascia of the femoral triangle to join the femoral vein, is located approximately 3–4 cm (about 1.5 inches) below and medial to the pubic tubercle. This is the site of the saphena varix in great saphenous varicosities and the target of high ligation in surgery (Trendelenburg operation). Medial (not lateral) to the pubic tubercle is the critical directional point because the femoral sheath and vein lie medial to the femoral artery which itself lies at the mid-inguinal point.

Reference: BD Chaurasia's Human Anatomy, 8th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.