China
Africa
Explore chapters and articles related to this topic
Vascular Anatomy
Published in Swati Goyal, Neuroradiology, 2020
Ophthalmic segment Ophthalmic arterySuperior hypophyseal artery
General Aspects of Endocrine Physiology
Published in Peter Kam, Ian Power, Michael J. Cousins, Philip J. Siddal, Principles of Physiology for the Anaesthetist, 2020
Peter Kam, Ian Power, Michael J. Cousins, Philip J. Siddal
The posterior pituitary derives its blood from the capillary plexus arising from the inferior hypophysial artery. The median eminence of the hypothalamus is the release centre for hypothalamic releasing factors and is supplied by branches of the superior hypophysial artery. The primary capillary plexus, arising from the superior hypophysial artery, forms the lesser portal veins, which give rise to a secondary capillary plexus that provides 90% of the blood supply of the anterior lobe.
The Pituitary Gland Eva Nagy
Published in Istvan Berczi, Pituitary Function and Immunity, 2019
The blood supply of the pituitary gland originates from branches of the superior hypophyseal artery, which is a branch of the internal carotid artery. Venous blood enters the pituitary by an important portal system, the so-called gomitoli, which are comprised of short terminal arterioles with strong muscluar walls surrounded by a dense capillary network. The capillaries drain into long portal veins that flow down the pituitary stalk to enter into the sinusoidal capillaries of the anterior lobe. The inferior hypophyseal arteries anastomose with each other. These vessels represent the major blood supply to the posterior pituitary and also contribute an arterial input to capillaries that drain into the short portal veins. The venous drainage of the pituitary gland enters into the internal jugular vein. The direction of blood flow in the portal veins is from the median eminence to the pituitary. Neuronal secretions of hypothalamus reach the adenohypophysis through these vessels (Figure 1).
From above or from below? That is the question. Comparison of the supraorbital approach with the endonasal approach. A cadaveric study
Published in British Journal of Neurosurgery, 2018
Simone Peraio, Paul Chumas, Paul Nix, Nick Phillips, Atul Tyagi
Under endoscopic guidance we gently retracted the brain with a 1.5 cm spatula to obtain an optimal view of the midline structures. The structures that we observed were, in order, the ipsilateral optic nerve, the ipsilateral carotid artery and the oculomotor nerve; we went through the optic-carotid window until the pituitary stalk, visualizing the superior hypophyseal artery. Anterior to the diaphragm sellae it was possible to get to all the anterior falx over the ethmoid bone. Posteriorly we reached the retro-infundibular area until the lamina terminalis, viewing the anterior cerebral artery and the anterior communicating artery (Figure 1(F)). Then we went contralaterally to visualize the contralateral optic nerve and the contralateral carotid artery.
Preoperative embolization of suprasellar hemangioblastoma supplied by artery of foramen rotundum: a case report and review of the literature
Published in British Journal of Neurosurgery, 2023
Sungjun Moon, Hui Joong Lee, Subum Lee
We searched for articles about sellar and suprasellar hemangioblastomas in PubMed using combinations of the following terms: sellar, suprasellar, pituitary and hemangioblastoma. Twelve studies were identified, which confirmed feeding arteries using digital subtraction angiography, CT or MR angiography, or surgery (Table 1). Small perforators from distal ICA were the most common feeders followed by the superior hypophyseal artery. Although one Japanese report described transdural artery from external carotid artery (ECA),2 we could not find any case in the English literature. So, one of the interesting points in our case was that AFR was main feeding artery.
Deflation of a Rathke cleft cyst triggered rupture of a superior hypophyseal artery aneurysm: a case report
Published in British Journal of Neurosurgery, 2019
Ryuheki Kitai, Takahiro Yamauchi, Yoshikazu Arai, Tetsuya Hosoda, Norichika Hashimoto, Kenzo Tsunetoshi, Yoshifumi Higashino, Ken-Ichiro Kikuta
As a result, the cyst was deflated, and the cyst wall was pulled downward into the pituitary fossa. This resulted in stretching of the adherent superior hypophyseal artery and development of an aneurysm. The size and shape of the tumour changed much more rapidly than in pituitary adenoma surgery. Rupture of the aneurysm was triggered by deflation of the RCC.