[Paresthetic notalgia. Report of 2 cases].

The Authors describe two cases of notalgia paresthesica, a disorder with localized pruritus of the back and hypesthesia for touch possibly due to a sensory neuropathy involving the posterior primary rami of thoracic nerve T2 through T6. The condition is not rare, but underdiagnosed for the poor clinical relevance. The possible X-linked hereditary transmission and other pathogenetic hypotheses are discussed.