Nodular Lesion in Cheek With a Hair TuftAyala, David MD; Escandell, Inés; Martin, Jose M.The American Journal of Dermatopathology: August 2017 - Volume 39 - Issue 8 - p e106 doi: 10.1097/DAD.0000000000000572 Clinical Pathologic Challenge Answer Abstract Author InformationAuthors Article MetricsMetrics Abstract: Trichostasis spinulosa is a rarely diagnosed disorder of the pilosebaceous unit, characterized by retention of telogen hairs within the dilated follicles. A hair tuft can be seen protruding from the follicles. We present a case of trichostasis spinulosa associated with intradermal melanocytic nevi, where dermoscopy helps to identify this entity. Department of Dermatology, Clinical University Hospital of Valencia, Valencia, Spain. Reprints: David Ayala Alcázar, MD, Departamento de Dermatología, Hospital Clínico Universitario de Valencia, Avenida Blasco Ibáñez, 1746010 Valencia, España (e-mail: firstname.lastname@example.org). The authors declare no conflicts of interest. Copyright © 2017 Wolters Kluwer Health, Inc. All rights reserved.