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Inferior gluteal vein

The inferior gluteal vein is a paired venous structure that accompanies the inferior gluteal artery and drains the gluteal region. It originates from a plexus around the gluteus maximus and surrounding muscles, then travels superiorly through the greater sciatic foramen below the piriformis muscle, and ultimately drains into the internal iliac vein.

The inferior gluteal vein communicates extensively with the internal pudendal vein, superior gluteal vein, obturator vein, and femoral vein, forming important collateral pathways. These connections contribute to the pelvic venous plexus and play a role in maintaining venous return when major pelvic veins are obstructed.

Clinically, the IGV is relevant in deep pelvic venous drainage, trauma, varicosities, pelvic congestion syndrome, and surgical approaches to the gluteal region. Its deep location and multiple venous connections make it a potential route for pelvic tumor spread, thrombosis propagation, and collateral venous flow.

Synonyms

  • Vena glutea inferior

  • Inferior sciatic vein

Function

  • Drains venous blood from the gluteus maximus, deep gluteal muscles, and posterior thigh structures

  • Forms part of the pelvic venous plexus, ensuring venous collateral circulation

  • Provides communication between pelvic veins and femoral venous system

  • Clinical role in pelvic congestion, varicosities, thrombosis, and venous return

MRI Appearance

T1-weighted images:

  • Inferior gluteal vein: linear hypointense structure coursing through fat and muscles of gluteal region

  • Surrounded by high-signal fat planes for visibility

T2-weighted images:

  • Flowing blood: signal void

  • Thrombosis or slow flow: hyperintense intraluminal signal

  • Muscle edema around vein: bright hyperintensity in cases of venous inflammation

STIR:

  • Suppresses fat, allowing vein and perivenous changes to be highlighted

  • Thrombophlebitis or inflammation: perivenous edema appears bright

T1 Fat-Suppressed Post-Gadolinium:

  • Enhances brightly, outlining venous lumen and tributaries

  • Detects venous malformations, thrombosis with collateralization, or tumor encasement

MRV (Magnetic Resonance Venography):

  • Normal signal: flowing blood appears bright hyperintense with contrast

  • Thrombosed vein: non-enhancing hypointense filling defect

  • Provides clear visualization of IGV’s origin, course, and anastomoses with pelvic plexus

  • Useful in pelvic congestion mapping and surgical planning

CT Appearance

Non-contrast CT:

  • Vein difficult to visualize without contrast

  • May appear as tubular soft-tissue structure adjacent to artery in gluteal fat planes

CT Post-Contrast:

  • Vein enhances clearly, showing its course through greater sciatic foramen to internal iliac vein

  • Useful for detecting mass effect, extrinsic compression, or venous dilation

CTV (CT Venography):

  • Normal signal: vein lumen opacifies as bright hyperdense structure

  • Thrombosis: seen as intraluminal filling defect within enhancing vein

  • 3D reconstructions delineate IGV and its anastomoses with pudendal, femoral, and obturator veins

  • Valuable in trauma, venous thrombosis, and pre-surgical pelvic mapping

MRI image

Inferior gluteal vein MRI axial anatomy image-img-00000-00000

CT image

Inferior gluteal vein CT axial images

CT image

Inferior gluteal vein ct coronal