• Ng Wing Tin Sophie S EA 4391, Faculté de Médecine de Créteil, Université Paris Est Créteil, Créteil, France. , Hela G Zouari, Abir Wahab, Damien Sène, and Jean-Pascal Lefaucheur.
• EA 4391, Faculté de Médecine de Créteil, Université Paris Est Créteil, Créteil, France.
• Pain Med. 2019 May 1; 20 (5): 979-987.

ObjectiveTo determine whether clinical features of neuropathic pain differ with respect to the presence of small-fiber neuropathy (SFN) in patients with primary Sjögren's syndrome (pSS).MethodsWe compared the clinical presentation of neuropathic pain between 15 patients with pSS and SFN detected by neurophysiological tests (laser-evoked potentials, cold and warm detection thresholds, sympathetic skin responses, and electrochemical skin conductance) and 15 patients with pSS but no neurophysiological evidence of SFN.ResultsThe patients with SFN had more intense squeezing and pressure sensations and more frequent dynamic mechanical allodynia (pain provoked by brushing) than the patients without SFN. Restless leg syndrome was also more frequently observed in patients with SFN, who had pain aggravated at rest that improved by moving.ConclusionsThese findings are in favor of the sensitization of relatively spared large Aβ-fibers and second-order nociceptive neurons in patients with SFN. On the other hand, burning sensations, which rather reveal sensitization of small nociceptive fibers, were observed whether SFN was present or not. Thus, some discriminating clinical features may help to suggest the presence of SFN in patients with pSS and chronic neuropathic pain.© 2018 American Academy of Pain Medicine. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

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