SUNCT syndrome: report of a possible symptomatic case.

SUNCT is one of the rarest and least known primary headache disorders. Although its pathogenesis has been partially understood by functional neuroimaging and reports of secondary cases, there is limited understanding of its cause. We report a case of SUNCT in a 54-years-old man, that could not be strictly classified as secondary SUNCT; however, the time lag of pain onset suggests a new theory in which neuroplasticity could be involved in the origin and duration of the pain in SUNCT syndrome.