000169219 001__ 169219 000169219 005__ 20260225150304.0 000169219 0247_ $$2doi$$a10.1111/jdv.18432 000169219 0248_ $$2sideral$$a148261 000169219 037__ $$aART-2022-148261 000169219 041__ $$aeng 000169219 100__ $$0(orcid)0000-0002-1691-3280$$aÁlvarez-Salafranca, M. 000169219 245__ $$aDermoscopy of glomus tumour: a cross‐sectional study of 86 cases 000169219 260__ $$c2022 000169219 5203_ $$aBackground Glomus tumours (GTs) are benign cutaneous neoplasms derived from the neuromyoarterial apparatus with a strong predilection for acral sites, especially the subungual space. Current data regarding dermoscopy of these lesions are very limited. Objectives To analyse the dermoscopic structures and patterns seen in a large series of subungual (SUGTs) and extraungual glomus tumours (EUGTs) and to determine their diagnostic significance. Methods Clinical and dermoscopic images of 86 histopathologically proven cases of GTs (47 SUGTs and 39 EUGTs) collected from 9 hospitals in Spain, France, Italy, and Brazil were evaluated for the presence of dermoscopic structures and patterns. Similarly, 189 and 185 dermoscopic images of other ungual tumours and other extraungual non-pigmented tumours, respectively, were evaluated for the same structures and patterns. Finally, we evaluate diagnostic testing accuracy calculating sensitivity (S), specificity (Sp), and positive and negative predictive values of the different patterns for the diagnosis of GT. Results Regarding SUGTs, four patterns were built from the combination of different structures. The pattern composed of a structureless purplish/red subungual spot with or without vessels reached the highest S (S1, 78.8%). The combination of a structureless purplish/red subungual spot and longitudinal erythronychia (LE) (S2) is highly specific (96.3%). Patterns S3 (proximal purplish/red subungual spot, LE, and distal notch) and S4 (bed subungual spot and onycholysis) are the most specific and exclusive of matrix and bed tumours, respectively. The most consistent pattern in EUGTs is composed of a structureless purplish-white to reddish-white homogeneous area and linear unfocused vessels (E) (S: 61.5%, Sp: 95.7%). EUGTs did not show lacunae, unlike other vascular tumours. Conclusions Dermoscopy is helpful in improving the diagnostic accuracy of GTs, not only in SUGTs but also when these lesions arise out of the ungual apparatus. 000169219 540__ $$9info:eu-repo/semantics/closedAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000169219 590__ $$a9.2$$b2022 000169219 591__ $$aDERMATOLOGY$$b4 / 70 = 0.057$$c2022$$dQ1$$eT1 000169219 592__ $$a1.51$$b2022 000169219 593__ $$aInfectious Diseases$$c2022$$dQ1 000169219 593__ $$aDermatology$$c2022$$dQ1 000169219 594__ $$a9.7$$b2022 000169219 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000169219 700__ $$aBañuls, J. 000169219 700__ $$aThomas, L. 000169219 700__ $$aHirata, S.H. 000169219 700__ $$aArgenziano, G. 000169219 700__ $$aMedina, C. 000169219 700__ $$aLacarrubba, F. 000169219 700__ $$adel Pozo, L.J. 000169219 700__ $$0(orcid)0000-0001-8789-6783$$aAra, M.$$uUniversidad de Zaragoza 000169219 700__ $$aZaballos, P. 000169219 7102_ $$11007$$2183$$aUniversidad de Zaragoza$$bDpto. Medicina, Psiqu. y Derm.$$cÁrea Dermatología 000169219 773__ $$g36, 11 (2022), 2016-2024$$pJEADV, J. Eur. Acad. Dermatol. Venereol.$$tJOURNAL OF THE EUROPEAN ACADEMY OF DERMATOLOGY AND VENEREOLOGY$$x0926-9959 000169219 8564_ $$s1060788$$uhttps://zaguan.unizar.es/record/169219/files/texto_completo.pdf$$yVersión publicada 000169219 8564_ $$s1911845$$uhttps://zaguan.unizar.es/record/169219/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000169219 909CO $$ooai:zaguan.unizar.es:169219$$particulos$$pdriver 000169219 951__ $$a2026-02-25-14:59:55 000169219 980__ $$aARTICLE