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Proper palmar digital veins (hand)

The proper palmar digital veins are slender superficial veins located along the palmar aspect of each finger, running parallel to the proper palmar digital arteries and digital nerves. They drain the pulp, skin, and subcutaneous tissues of the fingers and converge toward the web spaces before joining the common palmar digital veins.

These veins form part of the superficial venous network of the hand and are closely associated with the flexor tendon sheath, digital fat compartments, and fibrous septa anchoring the palmar skin. Because of their small caliber and superficial location, they are best evaluated with high-resolution MRI or contrast-enhanced CT.

Synonyms

  • Palmar digital venous plexus

  • Proper digital veins

Location and Structure

  • Located on the palmar aspect of the fingers, accompanying the proper palmar digital arteries.

  • Form longitudinal venous channels along the sides of the finger pads and distal phalanx.

  • Drain into the common palmar digital veins in the palmar web spaces.

  • Connected to dorsal venous networks through small communicating branches.

  • Thin-walled, easily collapsible veins situated within loose areolar tissue.

Relations

  • Palmar: Skin and digital pulp tissue

  • Dorsal: Flexor tendon sheath, digital fibrous septa

  • Medial & Lateral: Proper palmar digital arteries and digital nerves

  • Proximal: Drain toward common palmar digital veins

Function

  • Drain venous blood from the palmar aspect of the fingers

  • Assist in thermoregulation and venous return from distal phalanx

  • Provide superficial drainage pathway complementary to deep venous channels

MRI Appearance

T1-weighted images

  • Veins show low signal intensity (dark tubular structures) due to flowing blood.

  • Surrounding fat appears bright, enhancing vessel visibility.

  • Flexor tendon sheath and phalangeal bone marrow well visualized.

T2-weighted images

  • Flowing blood typically remains low signal, though slow flow may appear slightly brighter.

  • Soft tissue surrounding the digital veins appears intermediate-to-bright.

  • Clear delineation between veins, tendon sheath, and digital fat.

STIR

  • Veins appear as low-signal flow voids.

  • Fat is suppressed, making the venous channels more conspicuous.

  • Normal muscle and tendon structures appear intermediate-to-dark.

T1 Fat-Saturated Post-Contrast

  • Proper palmar digital veins show bright homogeneous enhancement because contrast opacifies the venous lumen.

  • Enhancing venous channels appear as thin linear or tubular bright structures.

  • Surrounding tendon sheath and soft tissue demonstrate mild background enhancement.

CT Appearance

Non-Contrast CT

  • Veins are generally not well visualized due to small caliber and low attenuation.

Post-Contrast CT

  • Veins become opacified with contrast, appearing as thin enhancing tubular structures.

MRI images

Proper palmar digital veins hand MRI axial image-img-00000-00000

MRI images

Proper palmar digital veins MRI coronal image-img-00000-00000