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. 2019 Aug;5(5):288-292.
doi: 10.1159/000497782. Epub 2019 Jun 28.

Seborrheic Dermatitis: Three Novel Trichoscopic Signs and Its Correlation to Malassezia sp. Colonization

León Felipe Ruiz-Arriaga  1 , Roberto Arenas  2 , Diana C Vega-Sánchez  2 , Daniel Asz-Sigall  3 , María Abril Martínez-Velazco  3
Affiliations

Seborrheic Dermatitis: Three Novel Trichoscopic Signs and Its Correlation to Malassezia sp. Colonization

León Felipe Ruiz-Arriaga et al. Skin Appendage Disord. 2019 Aug.

Abstract

Seborrheic dermatitis (SD) is a chronic recurrent erythemato-squamous condition that affects seborrheic areas causing flaking, erythema, and pruritus. Etiology is multifactorial and the role of Malassezia sp.remains controversial. We present a series of 12 patients with trichoscopic and direct microscopic exams. We analyzed the presence of the already known SD trichoscopic signs and its correlation to the amount of Malassezia sp. in the scalp. We describe three novel signs: the "dandelion" vascular conglomerate, the "cherry blossom" vascular pattern, and the intrafollicular oily material; of which the "dandelion" vascular conglomerate was the only trichoscopic sign to correlate with Malassezia colonization. This study correlates trichoscopic signs in SD and the quantity of Malassezia sp. We describe three new signs that can be useful to determine indirectly the fungal colonization of the scalp in SD.

Keywords: Malassezia sp.; Seborrheic dermatitis; Trichoscopy.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Fig. 1
Fig. 1
Trichoscopic signs found in our study. a Adherent scale. b Interfollicular white scale. c Peripilar white scale. d Interfollicular oily scale. e Peripilar oily scale. f Arborizing vessels. g Glomerular vessels. h “Cherry blossom” vascular pattern. i Comma vessels. j Serpentine vessels. k “Dandelion” vascular conglomerate. l Concretion (blue arrow). m Yellow dots. n Intrafollicular oily material. o Clusters of scales. p Interfollicular pustules.
Fig. 2
Fig. 2
Novel trichoscopic signs. a “Dandelion” vascular conglomerate. b “Cherry blossom” vascular pattern. c Intrafollicular oily material (blue arrows).
See this image and copyright information in PMC

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