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Superior medial genicular vein

The superior medial genicular vein is a tributary of the genicular venous network that drains the medial aspect of the knee joint. It accompanies the superior medial genicular artery around the femoral epicondyle and contributes to the extensive venous plexus surrounding the knee. It is an important structure in venous return from the periarticular tissues of the knee and provides collateral circulation pathways in cases of venous obstruction.

This vein is clinically relevant in vascular imaging, knee trauma, venous thrombosis, and reconstructive surgeries involving the knee joint.

Synonyms

  • Medial superior genicular vein

  • Venous tributary of the superior medial genicular artery

  • Part of the periarticular venous plexus of the knee

Origin, Course, and Branches

  • Origin: Arises from the periarticular venous plexus of the knee, particularly draining the medial capsule and adjacent soft tissues of the knee joint

  • Course:

    • Courses medially around the superior aspect of the medial femoral condyle

    • Travels with the superior medial genicular artery beneath the adductor magnus tendon insertion and over the medial femoral epicondyle

    • Joins the popliteal vein within the popliteal fossa

  • Branches:

    • Receives tributaries from the medial knee capsule

    • Communicates with the inferior medial genicular vein and superior lateral genicular vein through the periarticular venous network

    • Provides collateral drainage connections with deep muscular veins of the thigh

Relations

  • Anteriorly: Capsule of the knee joint, vastus medialis muscle

  • Posteriorly: Popliteal vessels in the popliteal fossa

  • Superiorly: Femoral shaft and adductor magnus tendon

  • Inferiorly: Medial femoral condyle and pes anserinus tendons

  • Medially: Skin and subcutaneous tissue of the medial knee

  • Laterally: Femoral artery and vein (proximal course), popliteal vein (distal termination)

Function

  • Drains venous blood from the medial aspect of the knee joint capsule and periarticular tissues

  • Contributes to the genicular venous anastomotic network

  • Provides a collateral pathway during venous obstruction of the popliteal or femoral systems

  • Maintains venous return during flexion and extension of the knee joint

Clinical Significance

  • Can be involved in deep vein thrombosis (DVT) propagation near the popliteal vein

  • Important in MRV/CTV studies of knee vascular pathology

  • May become dilated or tortuous in chronic venous insufficiency or varicosities

  • Provides critical collateral venous pathways in cases of femoral or popliteal vein obstruction

  • Can be inadvertently injured during medial knee surgeries

MRV Appearance

  • Visualized as an enhancing venous channel coursing medially around the femoral condyle

  • Demonstrates smooth, continuous enhancement with contrast

  • Thrombosed vein appears as a non-enhancing filling defect within the expected venous lumen

  • Dilated vein may be seen in venous insufficiency or collateralization

CTV Appearance

Non-Contrast CTV:

  • May show the vein as a small soft tissue density structure adjacent to the artery, enhanced by surrounding fat planes

  • Thrombosis may appear as a hyperdense clot in the lumen in acute cases

Post-Contrast CTV:

  • Normal vein shows homogeneous opacification with contrast

  • Thrombosed vein shows a filling defect

  • Collateral veins appear dilated and tortuous

  • Surrounding soft tissue stranding may indicate inflammation or thrombophlebitis

MRI image

Superior Medial Genicular Vein axial cross sectional anatomy 3T MRI AI enhanced radiology anatomy image-img-00000-00000_00001

MRI image

Superior Medial Genicular Vein coronal cross sectional anatomy 3T MRI AI enhanced radiology anatomy image-img-00000-00000