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Superior thalamostriate vein

The Superior Thalamostriate Vein is a prominent deep cerebral vein that plays a vital role in draining blood from the deep structures of the brain. Running within the groove between the caudate nucleus and the thalamus, it ultimately converges with the internal cerebral vein at the foramen of Monro. Recognition of this vein and its imaging characteristics is crucial for radiologists, especially in the context of deep venous thrombosis, congenital anomalies, or as a landmark during neurointerventional procedures.

Synonyms

  • Thalamostriate vein

  • Terminal vein

  • Superior terminal vein

Function

  • Drains venous blood from the caudate nucleus, thalamus, and adjacent deep white matter.

  • Contributes to the deep venous system, eventually joining the internal cerebral vein.

  • Serves as an important surgical and anatomical landmark during neurosurgical and interventional procedures.

  • Plays a role in the venous outflow from the basal ganglia and internal capsule region.

MRI Appearance

  • T2-Weighted Imaging

    • Appears as a flow void (hypointense linear structure) along the lateral margin of the caudate nucleus and thalamus.

    • Well-visualized due to the conspicuous black line, representing rapid blood flow.

    • No enhancement unless there is pathology (e.g., thrombosis).

  • T1-Weighted Imaging

    • Visualized as a linear hypointense (dark) structure.

    • Best appreciated with thin-slice, high-resolution images.

    • Normal appearance is a non-enhancing structure unless thrombosed.

  • 3D PC (Phase-Contrast) MRI

    • Superior visualization of venous anatomy.

    • Demonstrates the vein as a tubular structure with directional flow encoding.

    • Useful for mapping deep cerebral venous drainage and detecting flow abnormalities.

  • Post-Contrast T1-Weighted Imaging

    • Enhances brightly as a thin, well-defined linear structure due to gadolinium uptake in the venous blood.

    • Improved visualization against the surrounding non-enhancing brain parenchyma.

    • Helpful for confirming patency and delineating venous anatomy.

CT Appearance

  • Non-Contrast CT

    • Usually not directly visualized due to its small size and low inherent contrast with brain parenchyma.

    • May be faintly seen as a subtle hypodensity, but generally indistinguishable.

  • CT Venography (CTV)

    • Clearly seen as a thin, enhancing vein in the deep brain, adjacent to the lateral ventricle.

    • Appears as a linear or curvilinear high-attenuation structure, extending from the region of the caudate nucleus and thalamus toward the foramen of Monro.

MRI images

Superior thalamostriate vein MRI sagittal 3T image

MRI images

Superior thalamostriate vein MRI 3T coronal image

MRI images

Superior thalamostriate vein MRI axial 3T image