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Transverse veins of caudate nucleus

The transverse veins of the caudate nucleus are small, delicate venous structures found within the caudate nucleus of the brain. These veins play a key role in draining blood from the caudate nucleus into larger deep venous systems, particularly towards the thalamostriate and internal cerebral veins. Their recognition is important for understanding normal cerebral venous anatomy, interpreting neuroimaging, and for surgical or interventional procedures involving deep brain structures.

Synonyms:

  • Subependymal veins of the caudate nucleus

  • Transcaudate veins

  • Caudate nucleus subependymal veins

  • Caudate transverse veins

  • Veins of the caudate body

Function:

  • Drain venous blood from the caudate nucleus (primarily the body and head)

  • Convey blood laterally to the thalamostriate vein and then to the internal cerebral vein

  • Help maintain proper venous outflow from deep brain structures

  • Serve as potential collateral pathways in cases of deep venous thrombosis or obstruction

MRI Appearance:

T2-Weighted MRI:

  • Usually not visualized individually due to small caliber

  • May appear as tiny, low-signal (flow void) lines along the lateral ventricle near the caudate nucleus

  • Occasionally can be seen in high-resolution imaging as small hypointense linear or punctate structures adjacent to the ependymal surface of the lateral ventricle

T1-Weighted MRI:

  • Not typically visible as distinct veins in non-contrast T1

  • May appear as faint hypointense lines if large enough or in pathologic conditions

  • Usually indistinct from surrounding parenchyma in standard resolution

Post-Contrast T1-Weighted MRI:

  • May enhance as fine, linear, or punctate hyperintense structures paralleling the lateral ventricle and caudate

  • Best seen in thin-slice, high-resolution imaging

  • Visualization is often limited by size and partial volume effects

PC 3D (Phase Contrast 3D MR Venography):

  • May be depicted as tiny venous channels joining larger thalamostriate or internal cerebral veins

  • More reliably seen in high-resolution PC 3D MRV sequences

  • Appear as thin flow-related signal structures near the caudate and lateral ventricular wall

CT and CTV Appearance:

Non-Contrast CT:

  • Not visible due to small size and similar density to brain parenchyma

  • May only be indirectly appreciated if pathologically enlarged or calcified (rare)

CT Venography (CTV):

  • May be visualized as tiny linear enhancing structures paralleling the caudate nucleus and lateral ventricular wall

  • Identification is uncommon due to small caliber; best seen in high-resolution, thin-slice CTV

MRI images

Transverse veins of caudate nucleus MRI 3T sagittal image