The lateral posterior choroidal artery may be a singular structure or exist as multiple lateral posterior choroidal arteries. In both cases, they arise from the P2 segment of the [[posterior cerebral artery]] PCA, just distal (and lateral) to the medial posterior choroidal arteries. In some cases, they may arise from one of the PCA branches (parieto-occiptal).

They pass from the [[ambient cistern]] (cisternal segment) into the [[choroidal fissure]] and supply the [[choroid plexus]] (plexal segment) of the [[lateral ventricle]]. Anteriorly they anatamose with the distal branches of the [[medial posterior choroidal artery]], which ascend through the foramen of Monroe.