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Correspondence |

Minoxidil-Induced Trichostasis Spinulosa of Terminal Hair

Alexander A. Navarini, MD, PhD; Maya Ziegler, MS; Isabel Kolm, MD; Lisa Weibel, MD; Clarissa Huber, MD; Ralph M. Trüeb, MD
Arch Dermatol. 2010;146(12):1437-1438. doi:10.1001/archdermatol.2010.363.
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PubMed Link to Article[[XSLOpenURL/10.1046/j.1365-4362.2002.01508.x]]
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PubMed Link to Article[[XSLOpenURL/10.1111/ijd.2007.46.issue-9]]
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PubMed Link to Article[[XSLOpenURL/10.1111/jde.2009.36.issue-8]]
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Minoxidil-induced trichostasis spinulosa of terminal hair. A, Temporal region shows multiple small blackish spines extruding from hair follicle openings. The dotted line indicates the approximate area of minoxidil application; the asterisk indicates the approximate region evaluated by dermoscopy and shown in the inset at original magnification ×10. The further-enlarged area within the magnified inset area is original magnification ×50. B, Dermatopathologic specimen of an excised spine showing a terminal hair follicle with dilated infundibulum containing hyperkeratotic material and several detached hair shafts within a keratinous sheath ((hematoxylin-eosin, original magnification ×100).

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