DIAGNOSIS AND SURGICALTREATMENT OF CONGELNITALANOMALl[ES OF THEATLANTO-OCCIPITAL REGION

73 cases of congenital anomalies of theatlanto-occipital region are diagnosed and treat-ed operatively. Clinical appearance, symptomsand signs of cranial nerves, upper cervica.l cordand cerebellum, radiologic findings and opera-tive technic a.re presented. Long term surgicalresults are Gra.de I 39 cases, Grade 11 12 cases,Grade 111 4 cases and Grade IV 3 cases. Dif-ferential diagnosis, time of s;urgery and opera-tive complications are discussed.