Rosettes and other white shiny structures in polarized dermoscopy: histological correlate and optical explanation

Journal of the European Academy of Dermatology and Venereology : JEADV
M HaspeslaghL Brochez

Abstract

Rosettes are a specific form of a white shiny structure seen with polarized dermoscopy. The precise morphological correlate and optical explication are not known. To estimate the frequency of rosettes in ex vivo dermoscopy and to find explication and morphologic correlate of this dermoscopic feature. A series of 6108 consecutive skin biopsies were examined with ex vivo dermoscopy and when rosettes were present serial transverse sections with polarization were examined. In this series of 6108 consecutive skin biopsies, rosettes were found on ex vivo dermoscopy in 63 cases. When multiple we observed that they are always oriented at the same angle. Transverse sections with polarization of these lesions proved that smaller rosettes are mainly caused by polarizing horny material in adnexal openings, and larger rosettes by concentric perifollicular fibrosis. Rosettes are an optical effect of crossed polarization by concentric fibrosis or horny material and hence are not lesion-specific.

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Citations

Aug 30, 2017·Journal of the European Academy of Dermatology and Venereology : JEADV·J Dahlén GyllencreutzJ Paoli
Oct 1, 2019·Journal of the European Academy of Dermatology and Venereology : JEADV·M Mathur, P Acharya
Nov 27, 2019·International Journal of Dermatology·Prakash Acharya, Mahesh C Mathur
Sep 10, 2019·The Australasian Journal of Dermatology·Tuğçe Ertürk YılmazAylin Okçu Heper
Feb 15, 2020·Journal of the European Academy of Dermatology and Venereology : JEADV·B S AnkadB P Nikam
Apr 28, 2020·The Australasian Journal of Dermatology·Luciana P Antoniolli, Gabriela F Escobar
Aug 7, 2020·The Australasian Journal of Dermatology·Siddhartha DashPavithra Ayyanar
Jul 15, 2017·Journal of the European Academy of Dermatology and Venereology : JEADV·B Lozano-MasdemontE Rodríguez-Lomba
Dec 16, 2020·International Journal of Dermatology·Magdalena Żychowska, Małgorzata Żychowska
Oct 7, 2020·JAAD Case Reports·Gabriella FabbrociniAlfredo Guarino
Dec 9, 2020·Anais Brasileiros De Dermatologia·Rodrigo Gomes AlvesSergio Henrique Hirata
Mar 4, 2021·BMJ Case Reports·Jorge NavarreteCaroline Agorio
Mar 27, 2021·Indian Journal of Dermatology, Venereology and Leprology·Siddhartha DashBiswanath Behera
May 5, 2021·Indian Journal of Dermatology, Venereology and Leprology·Sarra SaadJamelleddine Zili
May 20, 2021·Anais Brasileiros De Dermatologia·Marcial Álvarez-SalafrancaMariano Ara-Martín
Jun 3, 2021·Journal of the European Academy of Dermatology and Venereology : JEADV·O ZaarJ Paoli
Aug 26, 2021·Indian Dermatology Online Journal·Keshavmurthy A AdyaAparna Palit

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