Ab1185 radiological Index in the Flat Vertebrae

Abstract

BackgroundSpine is a mechanical structure, which disposes their vertebral bodies in harmony with their stature, and progressively increasing in magnitude from the cervical to the lumbar spine (1). Defects in type II collagen gene are described, and in these cases, flat vertebra can be found, defined with flattening of the vertebral body, with irregular surface or with nodules of Schmorl, in isolation or in a maximum of two vertebral bodies, to distinguish it from Scheuermann’s disease (2). Image 1.ObjectivesCurrent vertebral indexes, don’t measure a relation between a person height and his vertebra, and if the harmony of the individual is accepted, an index that combines these variables must be created in order to guaranteeing the objectivity of the resultant value.Figure 1Figure 2MethodsPatients attending physician since 1994, both sexes, 20-55 years old, in whom Type II collagen disease or vertebral dysplasia was suspected, were selected for the study. A control group was created from patients that didn’t fulfill the last inclusion criteria. Their medical histories were taken. Eighth dorsal flat vertebra in a lateral chest radiograph were assessed by tripleobserver (two rheumatologists and one radiologist) according to the defined criteria. In all selected patients, a DEXA osteoporosis screening was performed, being chest trauma exclusion criteria.Finally, a descriptive study was carried out and a comparative study of average of vertebral index of the eight dorsal vertebra (VIDV8) results was applied: VIDV8 = 10 x LVD8/(HVD8 x stature). Image 2.Results174 subjects were analyzed, 84 in the study group and 90 in the control one, both homogeneous and without statistically significant differences in sex, age and height, with an average value in the study group of 47.15 years old, 48.8% women, 80.5 kg and 1,64 m. In control group: 44.5 years old, 52.2% women, 78.5 kg and 1,65 m. The VIDV8 value, did not show any significant difference compared to the previous variables, except for patient cohort, with an average value of 10.1 Meters-1 in control group, and 12.5 Meters-1 in pathological one (p <0.001). To a value of 11,108 Meters-1 the sensitivity is 90.5% and specificity 92.2%.ConclusionThe VIDV8 is stable for the variables sex, age, height, and weight. To an outcome of 11,108 Meters-1, it discriminates both groups with sensitivity of 90.5% and specificity of 92.2%, in order to avoid the ambiguity of the explorer.References[1] .White AA, Panjabi MM. Clinical Biomechanics of the Spine. 2nd ed, Lippincott Williams & Wilkins, 1990.[2] Rimoin DL, Lachman RS; The condrodysplasias, Practise of Medical Genetics. Edited by AEH Emery, DL Rimoin. New York, Churchill Livingston, 1990.Disclosure of InterestsNone declared