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Deep cerebral venous system is responsible for draining blood from the deep structures of the brain, including the basal ganglia, internal capsule, deep white matter, thalamus, and deep portions of the ventricles.

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Anatomy

Primary components

Vein Origin / Tributaries Drains Into Notes
Internal cerebral veins (ICVs) Thalamostriate vein + Septal vein + Choroidal vein Great vein of Galen Paired veins running along the roof of the third ventricle
Basal vein of Rosenthal Deep middle cerebral vein + anterior cerebral + striate veins Great vein of Galen Curves around midbrain; drains medial temporal and insular regions
Great cerebral vein (vein of Galen) Union of both ICVs and basal veins Straight sinus Midline vein; key conduit to dural sinuses
Thalamostriate vein Head of caudate, thalamus Internal cerebral vein Runs in floor of lateral ventricle
Choroidal veins (superior/inferior) Choroid plexus of lateral/3rd ventricle Internal cerebral vein Follow choroid plexus path
Septal vein Septum pellucidum Internal cerebral vein Very thin; courses near midline
Posterior mesencephalic vein Midbrain, tectum Basal vein or straight sinus Important for midbrain drainage

Drainage pathway

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Deep cortical/subcortical regions
     ↓
Thalamostriate / Septal / Choroidal veins
     ↓
Internal cerebral veins (ICVs)
     ↓
Great vein of Galen
     ↓
Straight sinus
     ↓
Confluence of sinuses → Transverse sinus → Sigmoid sinus → Internal jugular vein

Clinical Relevance

Condition Implication
Deep cerebral vein thrombosis Can lead to bilateral thalamic infarcts, often hemorrhagic; life-threatening
Vein of Galen malformation Neonatal high-output failure due to arteriovenous shunting into the median prosencephalic vein
Tumor compression E.g., pineal tumors may compress vein of Galen or internal cerebral veins, causing hydrocephalus or venous infarction
Hydrocephalus Obstruction near third ventricle (e.g., ICVs) may impair CSF reabsorption indirectly

Radiology

https://doi.org/10.1136/neurintsurg-2022-018917

Modality Utility
MRI (T2/SWI/FLAIR) Edema or infarction in bilateral thalami, basal ganglia
MR Venography (MRV) Visualizes internal cerebral veins, vein of Galen, straight sinus
CT Venography (CTV) Useful in acute setting; better for detecting sinus thrombosis
DSA (angiography) Gold standard for vascular malformations (e.g., vein of Galen aneurysmal malformation)

(A–L) Internal cerebral, basal, and deep venous systems (A–L), highlighting venous drainage balance. (A) The idea of “concentric rings” or grid-like arrangement can be very helpful in conceptualizing the deep system and its variations internal cerebral vein – pink; basal – black; thalamostriate – brown; septal – white; direct lateral – yellow; longitudinal caudate – purple; inferior ventricular – green; medullary – grey; subcortical – orange; transmedullary – blue). (B) Typical internal cerebral vein anatomy. The thalamostriate vein collects most of longitudinal caudate drainage, with remainder draining via the direct lateral vein. (C) Longitudinal caudate veins collect posteriorly into the direct lateral vein, often misidentified as “caudal opening of thalamostriate vein” (same colors). (D) The lateral group (green, caudate, inferior ventricular) veins drain via the lateral mesencephalic vein (arrow), while medial group drains “normally” into the Galen. (E) Full extent of basal vein (arrows) from the Galen to the cavernous sinus (arrowhead). (F) No functional cavernous connection. G) Disconnected basal vein segments. anterior (arrows) drains into cavernous sinus; middle (dashed arrows) into the lateral mesencephalic vein; posterior (arrowheads) into Galen; (H) Hypoplasia of mid-segment (same arrows as G). (I) Superimposing brainstem/fourth ventricle on venous images can be very helpful. Note how well the anterior pontine/mesencephalic/medullary veins (arrows) outline the brainstem. (J) The same group is hypoplastic, with some brainstem draining into vein of the lateral recess (arrow), and into a small bridging opening into the cavernous sinus. (K, L) Medullary venous congestion due to a small petrous apex fistula (arrow) with restricted outflow into the lower brainstem venous system (arrowheads) via the vein of lateral recess (dashed arrow).

(A–L) Internal cerebral, basal, and deep venous systems (A–L), highlighting venous drainage balance. (A) The idea of “concentric rings” or grid-like arrangement can be very helpful in conceptualizing the deep system and its variations internal cerebral vein – pink; basal – black; thalamostriate – brown; septal – white; direct lateral – yellow; longitudinal caudate – purple; inferior ventricular – green; medullary – grey; subcortical – orange; transmedullary – blue). (B) Typical internal cerebral vein anatomy. The thalamostriate vein collects most of longitudinal caudate drainage, with remainder draining via the direct lateral vein. (C) Longitudinal caudate veins collect posteriorly into the direct lateral vein, often misidentified as “caudal opening of thalamostriate vein” (same colors). (D) The lateral group (green, caudate, inferior ventricular) veins drain via the lateral mesencephalic vein (arrow), while medial group drains “normally” into the Galen. (E) Full extent of basal vein (arrows) from the Galen to the cavernous sinus (arrowhead). (F) No functional cavernous connection. G) Disconnected basal vein segments. anterior (arrows) drains into cavernous sinus; middle (dashed arrows) into the lateral mesencephalic vein; posterior (arrowheads) into Galen; (H) Hypoplasia of mid-segment (same arrows as G). (I) Superimposing brainstem/fourth ventricle on venous images can be very helpful. Note how well the anterior pontine/mesencephalic/medullary veins (arrows) outline the brainstem. (J) The same group is hypoplastic, with some brainstem draining into vein of the lateral recess (arrow), and into a small bridging opening into the cavernous sinus. (K, L) Medullary venous congestion due to a small petrous apex fistula (arrow) with restricted outflow into the lower brainstem venous system (arrowheads) via the vein of lateral recess (dashed arrow).

Key neuroimaging landmarks:

Structure Seen in Notes
Internal cerebral vein Axial MRI through third ventricle Runs just above third ventricle
Vein of Galen Midline sagittal CT/MRI Posterior to splenium of corpus callosum
Basal vein of Rosenthal Axial MRI around midbrain Arcs around cerebral peduncle and mesencephalon
Straight sinus Midline sagittal images Connects deep to superficial venous system