Related Experiment Video
Updated: Feb 3, 2026

Separation of Mouse Embryonic Facial Ectoderm and Mesenchyme
Published on: April 12, 2013
Facial Lichen Planopilaris: A Separate Entity or Not? A Case Series
Beatrice Van de Maele1, Katrien Vossaert2, Sven Lanssens2
1Department of Dermatology, University Hospital Ghent, Ghent, Belgium.
Abstract:
Lichen planopilaris (LPP) is an inflammatory hair disorder that is characterized by scarring hair loss, mostly affecting the vertex and parietal areas of the scalp. Frontal fibrosing alopecia (FFA) is considered a particular form of LPP, primarily affecting the hair follicles in the frontotemporal area of the scalp, with the hairline recession and eyebrow loss. There are case reports of FFA with concomitant involvement of facial vellus, characterized by roughening of the facial skin. We report five cases of facial vellus hair involvement in LPP, in the absence of other sites of disease activity. To the best of our knowledge, ours is the first report of LPP affecting the facial vellus hairs in the absence of FFA.
Related Concept Videos
Muscles for Facial Expressions
Resistors In Series
In a series circuit, the...
Facial Feedback Hypothesis
Series Resonance
Series and Parallel Capacitors
First, consider capacitors connected in series to a battery. In this configuration, the plate connected to the battery's positive terminal develops a positive charge, while the plate attached to the negative terminal becomes negatively charged. An equal magnitude of charge is induced on the...
Trigonometric Fourier series
The trigonometric Fourier series specifically expresses a periodic function with a defined period T using sine...

