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

January 2019 in “ Skin appendage disorders ”

León Felipe Ruiz-Arriaga, Roberto Arenas, Diana Carolina Vega-Sánchez, Daniel Asz-Sigall, María Abril Martínez-Velazco

Seborrheic Dermatitis trichoscopic signs dandelion vascular conglomerate cherry blossom vascular pattern intrafollicular oily material Malassezia sp. antifungal treatment SD dandelion sign cherry blossom pattern

TLDR Researchers found a new sign of fungal infection in some patients with Seborrheic Dermatitis.

In a 2019 study involving 16 patients with Seborrheic Dermatitis (SD), researchers discovered three new trichoscopic signs: the "dandelion" vascular conglomerate, the "cherry blossom" vascular pattern, and intrafollicular oily material. The "dandelion" sign, found in 25% of patients, was the only one associated with the level of Malassezia sp. colonization, indicating its potential as a marker for fungal presence and the need for antifungal treatment. The "cherry blossom" pattern and intrafollicular oily material were observed in 6.25% and 31.25% of patients, respectively. The study highlighted the "dandelion" vascular conglomerate as a significant indicator of SD related to Malassezia sp.

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