1 Tumors of the foramen magnum are mostly benign.

2 Objective The surgical management of foramen magnum malformation associated with syringomyelia is controversial.

3 Take foramen magnum resin D101 to separate polysaccharide from the zymotic fluid of Cordyceps mycelium, the phenol-SO2 method to measure polysaccharide in sample.

4 Objective To explore a surgical ventral and lateral foramen magnum tumors by far lateral suboccipital approach.

5 Extra-dural decompression of foramen magnum could be a choice of mamilly invasive surgery of ACM-I with a successful results and lower rate of complication.

6 These small cerebellar projections - we call them the tonsils - have been compressed against the bony rim of the foramen magnum.

7 Results There were 3 cases existing in the asymmetry of vertebral artery, 2 with abnormal segment, 1 directly entering the foramen magnum, and 1 invaded by tumor.

8 Objective To study the microsurgical anatomy and clinical application of the far-lateral transcondylar approach and to protect the vital structure around foramen magnum.

9 It extends posteriorly between the orbits and otic capsules to the foramen magnum.

10 Results:Removing the part of occipital condyle by the surgical approach could satisfactorily reveal the anterior region of foramen magnum, with minimum damage to those considerable vessels and nerves.

11 Objective: To explore the operation modalities for anomalies of the foramen magnum region( AKMR).

12 This opens a route through the nasal and oral cavities to the clivus, foramen magnum, and upper cervical area.

13 Objective To investigate the diagnosis and microsurgical treatment of neurilemmomas of the foramen magnum.

14 The position of a hole at the bottom of the skull called the foramen magnum suggests that Toumai (Sahelanthropus tchadensis) walked upright - an important signature of the human lineage.

15 Malformation of the craniocervical region, also known as malformation of the foramen magnum region, relates to many diseases.

16 Objective To study the diagnosis and outcome of tumors in the foramen magnum region.

17 Objective:To develop rational surgical approach and to further improve the surgical outcomes to foramen magnum tumors.

18 Conclusion:Study of microanatomy in the far lateral approach is helpful in resecting tumours of the ventro- foramen magnum and the lower clival region and preserving important tissues.

19 Conclusion:Study on the microsurgical anatomy of the far lateral suboccipital approach was helpful in resecting tumors situated at lower clivus and foramen magnum.

20 Objective: To study the motor evoked potentials (MEP) in foramen magnum lesions.