Microanatomy of the intrachoroidal vasculature of the lateral ventricle.
OBJECTIVE
Intraventricular surgery requires a detailed knowledge of the microanatomy of the choroid plexus vasculature.


METHODS
Twenty choroid plexuses were microdissected, and two additional plexuses were prepared for microscopic examination.


RESULTS
The choroid plexus was perfused primarily by the anterior choroidal artery (AChA) and the lateral posterior choroidal artery (LPChA). The AChA, which averaged 650 microm in diameter, most often (in 75% of cases) divided into the medial and lateral trunks, which averaged 450 microm in diameter. The medial trunk gave off the bush-like intrachoroidal branches, whereas the lateral trunk divided into the parallel arteries. The inferior LPChA was present in 50% of the hemispheres, both the inferior and superior LPChAs in 40%, and their common trunk in 10%. In 40%, the LPChA, which averaged 670 microm in diameter, divided into the terminal trunks, with a mean diameter of 490 microm. The anastomoses involving the trunks of the LPChA and other choroidal arteries averaged 310 microm in diameter. All primary intrachoroidal branches of the AChA and LPChA were divided into three groups. The parallel branches, which averaged from 220 to 230 microm in diameter, coursed along the lateral part of the choroid plexus. The tortuous glomus vessels, which averaged 310 microm in size, originated from the AChA (45%), the LPChA (15%), or both (40%). The bush-like vessels, with a mean diameter between 155 and 190 microm, ramified into smaller twigs, up to the intrachoroidal capillaries.


CONCLUSIONS
The data obtained on the microanatomy of the intrachoroidal vasculature may have certain neurosurgical implications.
Department of Neuroanatomy, Institute of Anatomy, School of Medicine, University of Belgrade, Belgrade, Yugoslavia.
Slobodan
S
Marinković
Hirohiko
H
Gibo
Milan
M
Milisavljević
Vuk
V
Djulejić
Vladimir T
VT
Jovanović
D000328:Adult; D000368:Aged; D002831:Choroid Plexus / Q000166:cytology* / Q000601:surgery*; D003399:Craniotomy / Q000379:methods; D006801:Humans; D066298:In Vitro Techniques; D020547:Lateral Ventricles / Q000166:cytology* / Q000601:surgery*; D042282:Microdissection; D008866:Microsurgery / Q000379:methods*; D008875:Middle Aged