What is the role of imaging studies in the diagnosis of postherpetic neuralgia (PHN)?

Updated: Mar 06, 2018
  • Author: W Alvin McElveen, MD; Chief Editor: Robert A Egan, MD  more...
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A study by Haanpaa et al revealed the following: [6]

  • MRI lesions attributable to HZ were seen in the brain stem and cervical cord in 9 patients (56%).

  • At 3 months after onset of HZ, 5 patients (56%) with an abnormal MRI had developed PHN.

  • Of the 7 patients who had no HZ-related lesions on MRI, none had residual pain.

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