Exclamation mark hairs Images
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Alopecia areata : cadaveric (comedone-like aspect) and exclamation mark hairs (see below right).
Exclamation mark hairs. reflected light microscopy (Alopecia areata in a 10-year-old girl): Short hair stumps with hair shaft narrowing after proximal and punctiform fracture at the end. furthermore, single comedo-like hair remains (points noir), so-called cadaver hairs, and some persistent lighter hairs are visible.