Videodermoscopy of eyelashes in Netherton syndrome

We read with great interest the article entitled ‘Matchstick eyebrow hairs: a dermoscopic clue to the diagnosis of Netherton syndrome’ published by E. Goujon et al. in the JEADV,1 in which the authors reported a new dermoscopic morphological aspect typical of Netherton Syndrome (NS). We too have investigated hair shaft abnormalities by videodermatoscope and we would like to add some annotations. Until now, three characteristic hair alterations have been described in the literature: (i) trichorrhexis invaginata, (ii) golf-tee hairs and (iii) matchstick hairs. The pathognomonic hair feature of NS is the trichorrhexis invaginata, an invagination of distal dilated hair portion in a concave proximal hair terminal, universally known as ‘bamboo hairs’ and ‘ball-and-socket’ aspect.2