الفهرس 
Microsurgical anatomy of trigeminal nerveOnly 14 pages are availabe for public view
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Abstract
Twenty patients constituted our study. All patients were undergone
microvascular decompression (MVD) in the Neurosurgery Department, Tanta
University Hospitals. The age of patients varied from 31 to 62 years with a
mean age of 53.80±7.38 years at the time of surgery. The peak incidence was
at the 5th and 6th decades of life. Female predominated than males with the
percentage of 75% females and 25% to males with females to males ratio is< 3/1. 75 % of patients suffered from severe pain for 4-6 years. The right side of the face was found to be involved in 16 patients (80%) and left side in 4 patients (20%) with right to left ratio is 4:1. V3 branch was mostly affected in 40 % of cases, followed by the V2 branch in 20 % of cases and V1 is the least affected branch occurred in 5% of patients. Ninety percent of the patients were previously treated with carbamazepine combined with other drugs and 10 % of patients were previously treated with carbamazepine only. The vessel identified during surgery as the most important cause of nerve compression was superior cerebellar artery (SCA) in 70% of patients who showed immediate pain relief and excellent to good outcome. The anterior inferior cerebellar artery (AICA) occurred in 15% of patients; they showed immediate pain relief and excellent outcome, followed by venous compression (probably by transverse pontine vein and pontotrigeminal vein) in 10% of patients who showed immediate pain relief and excellent outcome. Multiple blood vessels (either arterial by SCA or AICA or venous by transverse pontine vein and pontotrigeminal vein) were also detected in 5% of cases who showed delayed pain relief which relieve after 3 months and good outcome.