1: Introduction -- 2: Terminology/Classification -- 3: Anatomy of the Trigeminal nerve -- 4: Anatomy of Vessels and Surrounding structures -- 5: Clinical assessment and Specialty investigations -- 6: Neuro-Imaging assessment -- 7: Differential diagnoses -- 8: Pharmacological treatments -- 9: Surgery: historical evolution -- 10: Surgical treatments: Micro-Vascular Decompression -- 11: Surgical treatments: Other Open techniques -- 12: Surgical treatments: Percutaneous Lesioning techniques -- 13: Surgical treatments: Stereotactic Radiosurgery -- 14: Decision-making -- 15: Conclusions.