“Despite the localized unilateral position of the impaction, no roentgenographic signs such as volume loss or opacities were evident, and the clinical findings were bilateral.”

“Nine of the 38 athletes who underwent roentgenographic examination had evidence of intervertebral disc disease, and 6 had vertebral wedging or Schmorl's nodes or both.”

“Laboratory assessment of disease activity is dependent on nonspecific tests including roentgenographic findings, physiologic testing, and blood studies.”