Deep Cerebral Veins

div style=”display:none;”>

Deep Cerebral Veins

Main Text

TERMINOLOGY

Abbreviations

• Septal, thalamostriate, internal cerebral veins (SV, TSV, ICV)
• Vein of Galen (VofG); basal vein of Rosenthal (BVR)
• Inferior sagittal sinus (ISS); straight sinus (SS)

Definitions

• Cavum veli interpositi: Space within double-layered tela choroidea of 3rd ventricle, communicates posteriorly with quadrigeminal cistern

GROSS ANATOMY

Overview

• Medullary veins
- Small, linear veins originate 1-2 cm below cortex
- Course toward ventricles, terminate in subependymal veins
• Subependymal veins
- SV
  - – Course posteriorly along septum pellucidum
  - – Join with TSVs to form ICVs at interventricular foramen
- TSVs
• Deep paramedian veins
- ICVs
- VofG (great cerebral vein)

Anatomy Relationships

• Deep veins course under ventricular ependyma, define ventricular margins
• ICVs above 3rd ventricle, pineal gland; under fornices, corpus callosum splenium

Vascular Territory

• ICVs, VofG, and tributaries drain ovoid area surrounding lateral/3rd ventricles
• Caudate nuclei, putamen/globus pallidus, thalamus, internal capsule, deep cerebral (medullary) white matter, medial temporal lobes

IMAGING ANATOMY

Overview

• Medullary veins
- On DSA, appear as tiny, relatively uniform, contrast-filled, linear structures that terminate at right angles to ventricular subependymal veins
• Subependymal veins
• Deep paramedian veins

Normal Variants, Anomalies

• Variations common; true anomalies rare
• VofG malformation
- Primitive median prosencephalic vein (MPV) persists as outlet for diencephalic, choroidal venous drainage
- Persisting falcine sinus ± absent/hypoplastic SS

ANATOMY IMAGING ISSUES

Imaging Recommendations

• MRV/CTV delineate dural sinuses, large deep veins (e.g., ICV, BVR)
• DSA best for detailed delineation of deep veins/tributaries

EMBRYOLOGY

Embryologic Events

Tags: Imaging Anatomy Brain and Spine

Mar 13, 2021 | Posted by admin in NUCLEAR MEDICINE | Comments Off

Full access? Get Clinical Tree

Get Clinical Tree app for offline access

Get Clinical Tree app for offline access