Evaluation of Dermoscopic Features in Facial Melanosis with Wood Lamp Examination

Abstract

Introduction: Facial melanosis is one of the most common reasons for which patients refer to a dermatologist in Nepal. Objectives: The objective of this study was to evaluate the dermoscopic findings of common facial melanoses and correlate them with findings from Wood lamp examination. Methods: This was a cross-sectional study conducted at the Department of Dermatology and Venereology, Nepal Medical College and Teaching Hospital. We recruited a total of 204 patients from July 2020 to March 2021. The most common diagnosis was melasma (37 patients) followed by melasma with steroid-induced rosacea-like dermatitis (29 patients). After collecting clinical and demographic data, patients underwent Wood lamp and dermoscopic examination. Results: Dermoscopy of ashy dermatosis and nevus of Ota revealed blue-gray pigmentation forming a curvilinear pattern; café-au-lait macule and nevus spilus revealed a light brown reticular pattern with follicular sparing; and a reticular and hem-like pattern of pigmentation was observed in clofazimine-induced pigmentation, peribuccal pigmentation of Brocq and periorbital pigmentation. The degree of agreement between Wood lamp and dermoscopic findings was found to be statistically significant in melasma (κ = 0.701, P = 0.0001) and melasma with steroid-induced rosacea-like dermatitis (κ = 0.628, P = 0.0001). While the agreement between the two techniques was 100% for epidermal types, it decreased to 44.8% for dermal melasma and 61.5% for dermal melasma with steroid-induced rosacea-like dermatitis. Conclusions: Dermoscopy is useful in assessing facial melanoses. It may be supplemented with Wood lamp examination to increase diagnostic accuracy.

Inflammatory response: The target for treating hyperpigmentation during the repair of a burn wound

“…However, PIH that occurs in the dermis cannot be distinguished as well as that in the epidermis under the Wood’s lamp examination. The accuracy of Wood’s lamps in differentiating between dermal and mixed melasma can be improved with the assistance of dermoscopy ( 95 ).…”

Dermoscopic Features of Different Forms of Cutaneous Mastocytosis: A Systematic Review

“…The following supporting information can be downloaded at: , Table S1: Dermoscopic features of the entities that may clinically resemble cutaneous mastocytosis. References [ 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 ] are cited in the supplementary materials.…”