Notalgia paresthetica.

Notalgia paresthetica was described by Astwazaturow in 1934. We have seen six cases in the past year, suggesting that it is not rare. This sensory neuritis affects the posterior rami of several spinal nerves (arising from thoracic segments T2 to T6), causing pruritus, burning, and dysesthesias. Examination reveals hypesthesia. Although the cause is not known, the course seems benign. The posterior rami of these five dorsal roots traverse a 90-degree course through the multifidus spinae muscle, making them unique among the posterior rami.