The Methods And Value Of Screening Hirayama Disease By X-ray

[Objective]Investigating the method and value of the abnormal cervical spine activity of flexionposition and extended position with a sign of X-ray to screen Hirayama disease.[Materials and methods]30patients were as experimental group, according to clinically manifestation andcervical passive flexion position MRI to diagnose Hirayama disease.30normalvolunteers were as control group, respectively taken cervical active flexion positionand extended position with a X-ray.Then measuring the angulation of C2-7on twoadjacent vertebral rear with the flexion and extended position X-ray plain film,both ofexperimental group and control group, as the evaluation index of cervical spineactivity.[Results]The cervical flexion angles of C2-3, C3-4，C4-5, C5-6, C6-7, C2-7, C3-7which fromexperimental group were higher than which belong to control group, and thedifference has statistical significance (P <0.05).Of which, the difference of C3-4，C4-5, C5-6, C6-7, C2-7, C3-7cervical flexion angles was significant. The segmentalcervical flexion angles average of the experimental group were3.72°,8.34°,7.96°,10.79°,9.52°,39.42°and35.86°. There was no statistically significant differencein the cervical extended angle of the experimental group and the control group.Theabnormal cervical flexion angle as a effective indicator to screen Hirayama diseasewas divided into positive after the assignment with a score of4or higher boundaryvalue, its diagnostic sensitivity for Hirayama disease was90.00%, specificity of86.67%. Depicting receiver operating characteristic curve (ROC), the area under of the curve was0.908.[Conclusions]The cervical flexion activity in C2-7of the Hirayama disease were exceed that of thenormal control group, and the extended activity has no significant difference than thecontrol group. Combined with clinical symptoms and signs, the value of the cervicalactive flexion position X-ray plain film reflects abnormal signs activity to diagnoseHirayama disease was higher, and in a wide range of screening, young studentsphysical examination and unconditional cervical flexion MRI, the checking methodcan be used as a auxiliary diagnosis method to the Hirayama disease.