Applied Anatomy Of Transoral Approach To Jugular Foramen

Part? the microanatomy study of transoral approach to jugular foramen regionObjective The microanatomy was performed through the transoral approach to the jugular foramen to provide anatomical basis for the treatment of jugular foramen lesions.Methods Fifteen(30 sides)adult cadaveric heads specimens perfused with colored latex were used to investigate the microsurgical anatomy of the transoral approach to the jugular foramen with the help of surgical microscope,so as to observe the structure in this approach,locate the anatomic markers and measure the relevant data.Results The extracranial part of jugular foramen was well exposed in fifteen cadaver heads(30 sides),and medial anterior lesions in jugular foramen could be exposed from carotid ridge to lateral border of occipital condyle and centerline to the styloid process.After removing the anteromedial bone of the jugular foramen,the inferior petrosal sinus,?~? nerve walking relationship in the jugular foramen could be observed.The distance was(12.47 + 1.49)mm from anterior edge of the occipital condyle to the anterior edge of the hypoglossal canal external opening;the distance was(9.90 + 1.40)mm from superior edge of the hypoglossal canal external opening to the carotid ridge.Conclutions The anterior medial area of jugular foramen could be well exposed through the transoral approach,and the occipital condyle and carotid ridge were used as anatomic markers,which was helpful to protect the vital nerves and vascular structures by this approach.Part? the applied anatomy of the endoscopic transoral approach to jugular foramen regionObjective Study on anatomy of endoscopic transoral approach to jugular foramen,in order to contribute to the application of this approach to remove the communicating tumor in jugular foramen region.Methods With the aid of endoscope,15 cadaveric head specimens were used to simulate transoral approach to jugular foramen,observed the extracranial and intracranial structure of jugular foramen,locate the anatomic markers and measure the relevant data.Results Transoral approach can reveal extracranial region of jugular foramen well,especially the anterior medial region.The best exposure to the midline region of the encephalic stem was obtained after removing the bone from the hypoglossal canal external opening to the midline of the clivus.The occipital condyle,supracondylar groove and carotid ridge are significant anatomical symbols in this approach.The distance was(14.51 ± 2.30)mm from anterior edge of the occipital condyle to inferior edge of the hypoglossal canal external opening.The distance was(24.11 ± 2.19)mm from anterior edge of the occipital condyle to carotid ridge.The distance was(21.26±2.26)mm from anterior edge of the occipital condyle to the upper edge of the jugular tubercle.Conclusion This approach is helpful in dealing with the principal part of tumors in the medial region of the jugular foramen.Part ? endoscopic approach for resection of schwannoma of glossopharyngeal in the left jugular foramen: a case reportObjective To discuss the operability and effect of the endoscopic transoral approach for the removal of glossopharyngeal schwannoma in the jugular foramenMethods A case report of young women underwent two-stage endoscopic transoral resection of the left dumbbell-shaped glossopharyngeal schwannoma of jugular foramen in our hospital.Results The patient's operation was completed successfully.After operation,the MRI showed that more than 95% tumor tissues had been resected,the symptoms of choking and coughing,left deviation of tongue,tinnitus symptoms were relieved,and no other posterior cranial nerve dysfunction was found.Conclusion Endoscopic transoral approach for resection of jugular foramen glossopharyngeal schwannoma is safe and operable,with less trauma and quicker recovery,and can maximize the retention and improvement of the posterior cranial nerve function in this area.