Brachioradial Pruritus Workup

Updated: Aug 07, 2018
  • Author: Julianne Mann, MD; Chief Editor: Dirk M Elston, MD  more...
  • Print
Workup

Laboratory Studies

If herpes zoster is suspected, consider direct immunofluorescence with fluorescein-tagged antibody or polymerase chain reaction studies to detect varicella-zoster virus.

Next:

Imaging Studies

Among patients who do not respond to conventional treatments or whose symptoms progressively worsen despite treatment, consider cervical spine MRI to rule out tumor or cervical rib and to evaluate for cervical radiculopathy. [31]  In those with spinal cord injury, brachioradial pruritus may point to underlying syrinx formation. [34]

Previous
Next:

Procedures

Electromyography or nerve conduction velocity studies may show delay of F responses of median and ulnar nerves and may assist in diagnosis in ambiguous cases. [7]

Previous
Next:

Histologic Findings

Biopsy of skin reveals atrophy and signs of sun damage, along with reduced numbers of both dermal and epidermal nerve fibers. Evidence exists that this reduction in cutaneous innervation occurs only during symptomatic flares, with innervation normalizing during symptom-free periods; thus, biopsy should ideally be performed when patients are actively experiencing symptoms. [11]

Previous
Next:

Staging

No staging system currently exists for brachioradial pruritus.

Previous