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Lateral plantar veins

The lateral plantar veins are paired deep veins located in the sole of the foot. They accompany the lateral plantar artery and are major components of the deep plantar venous network, draining blood from the lateral aspect of the plantar surface and the lateral toes.

These veins begin near the base of the fifth toe, ascend along the lateral plantar surface, and join the medial plantar veins near the proximal foot to form the deep plantar venous arch, which communicates with the dorsal venous arch through perforating veins.

The lateral plantar veins are clinically important in evaluating distal deep vein thrombosis (DVT) of the foot, post-thrombotic changes, and plantar venous congestion, especially on MR venography (MRV) and CT venography (CTV).

Synonyms

  • Deep lateral plantar veins

  • Veins of the lateral plantar artery

  • Plantar deep venous plexus (lateral component)

Origin, Course, and Termination

  • Origin: Begins near the base of the fifth toe and the lateral aspect of the plantar digital veins

  • Course: Runs medially and anteriorly along the lateral side of the foot, accompanying the lateral plantar artery beneath the plantar aponeurosis

  • Termination: Joins the medial plantar veins at the level of the first intermetatarsal space to form the deep plantar venous arch, which drains into the posterior tibial veins

Relations

  • Superiorly: Plantar muscles (abductor digiti minimi, flexor digitorum brevis)

  • Inferiorly: Plantar fascia and subcutaneous fat of the sole

  • Medially: Medial plantar veins and neurovascular bundle

  • Laterally: Lateral plantar artery and digital veins

  • Posteriorly: Communicates with fibular (peroneal) veins

Function

  • Venous drainage: Drains blood from the lateral toes, lateral foot, and adjacent plantar tissues

  • Formation of venous arch: Contributes to the deep plantar venous arch

  • Venous return: Directs blood proximally to the posterior tibial venous system

  • Valvular control: Contains valves that prevent retrograde flow

  • Clinical importance: Potential site for early distal DVT formation or venous stasis in foot injuries

Arterial Relations

  • Closely accompanies the lateral plantar artery, forming a venous–arterial bundle within the plantar compartment

Venous Drainage Pattern

  • Drains laterally into fibular veins and proximally into posterior tibial veins

  • Communicates with the dorsal venous arch via perforating veins

Clinical Significance

  • Distal DVT: Lateral plantar veins are a common initial site for calf DVT propagation

  • Venous congestion: Seen in chronic venous insufficiency or plantar edema

  • Post-thrombotic change: Recanalized segments appear irregular or thick-walled on MRV/CTV

  • Injury or inflammation: Can occur with trauma or compression under the plantar fascia

  • Imaging relevance: MRV and CTV essential for evaluating deep plantar venous anatomy and thrombosis

MRI Appearance

  • T1-weighted images:

    • Normal veins: intermediate signal intensity, appearing as thin tubular structures accompanying the artery

    • Flowing blood: typically low signal, but slow flow may appear bright due to flow-related enhancement

    • Thrombus: intermediate-to-bright signal depending on clot age

  • T2-weighted images:

    • Normal veins: intermediate to low signal lumen

    • Slow flow: often bright, mimicking partial filling

    • Acute thrombus: hyperintense; chronic thrombus: low signal from hemosiderin or fibrosis

  • STIR:

    • Normal: low-to-intermediate signal

    • Slow flow or acute thrombus: bright hyperintense signal

    • Excellent for detecting edema or inflammatory perivenous changes

  • Proton Density Fat-Saturated (PD FS):

    • Normal: dark lumen with bright surrounding fat

    • Slow flow or thrombus: bright or heterogeneous hyperintense signal

    • Wall thickening and perivenous inflammation better visualized

  • T1 Fat-Saturated (T1 FS):

    • Normal: lumen is low signal, with bright surrounding fat

    • Slow flow: may appear bright

    • Acute thrombosis: intermediate to high signal

    • Post-thrombotic wall changes: mild enhancement may be seen after contrast

  • T1 Fat-Sat Post-Contrast:

    • Normal: homogeneous venous enhancement

    • Thrombosis: non-enhancing filling defect

    • Perivenous enhancement: indicates inflammation or recanalization

MR Venography (MRV) – Contrast Enhanced

  • Technique: 3D contrast-enhanced MRV or time-resolved MR angiography sequences

  • Normal appearance: Paired lateral plantar veins with smooth, enhancing lumens paralleling the lateral plantar artery

  • Thrombosis: non-opacified filling defect within expected venous location

  • Recanalized segments: show irregular, patchy enhancement

  • Perivenous edema: hyperintense on T2/STIR, indicating active inflammation

  • Clinical use: Excellent for mapping plantar venous arch, DVT detection, and assessing venous outflow obstruction

CT Appearance

Non-Contrast CT:

  • Veins appear as small soft-tissue density channels adjacent to the lateral plantar artery

  • Difficult to distinguish unless thrombosed (hyperdense acute clot)

  • Indirect signs: fat stranding, perivenous edema, or swelling of plantar tissues

CT Venography (CTV):

  • Normal: Lateral plantar veins enhance uniformly, forming the deep plantar venous arch

  • Thrombosis: non-enhancing intraluminal filling defect

  • Chronic changes: narrowed, irregular lumen or collateral formation

  • Utility: Excellent for evaluating distal foot venous anatomy and plantar DVT when MRV unavailable

MRI image

Lateral plantar veins AXIAL cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000

MRI image

Lateral plantar veins AXIAL cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000_00001

MRI image

Lateral plantar veins AXIAL cross sectional anatomy 3T MRI AI enhanced radiology image-img-00000-00000_00002