An anatomical study of the neurovascular relationships at the trigeminal root entry zone

Trigeminal neuralgia caused by aneurysm of the posterior cerebral artery: a case description and the analysis of anatomical variety of vascular complex in the rood entry zone of trigeminal nerve

“…The most common configuration was the caudal loop of SCA cross-compressed the trunk of the V th nerve [7]. Similar results were obtained by Ramesh and Premkumar [18] during the studies of 100 cadavers. From 39 confirmed vascular conflicts, 59% concerned SCA, 18% AICA and 13% the pontine branches of BA.…”

“…Haines et al [7] showed similar percentage (12.5%) of the patients, and only 7.5% of the cadavers. In the other observations the percentage was 7.5-16.6% [11,18,30] and it was the only reason of TGN in patients undergoing surgery. According to Rhoton [19] and Matsushima et al [14], the most common anatomical variations of venous compression are: the transverse pontine vein, the vein of the middle cerebellar peduncle, the vein of the cerebellopontine fissure, the pontotrigeminal vein and the lateral mesencephalic vein [14,19].…”

Endoscopic Vascular Decompression of the Trigeminal Nerve

“…In 37 patients an arterial loop was in contact at the root entry zone. Grooving and displacement of nerves were seen in 5 and 9 patients, respectively [ 14 ] . There was no vein at root entry zone in any of the case in our series.…”

MRI-derived neurovascular compression score provides the indication of surgical treatment of patients with primary trigeminal neuralgia: A validated multi-center study

“…NVC without morphological changes-a simple contact commonly occurred in patients with facial pain or even without causing symptoms (6,23,24), which was considered as a normal neuroanatomic variant of patients with facial pain but not ful lling the trifacial neuralgia diagnostic criteria (3,9). And these patients had the tendency to develop into classical paroxysmal pain, which indicated the importance of follow-up for these patients.…”