Dermatology: Practical and Conceptual Image Letter | Dermatol Pract Concept. 2024;14(3):e2024136 1 Bilateral Facial Hair Whorls in a Child Vincenzo Piccolo1, Ramon Grimalt2, Julia Nowowiejska3, Mario Cutrone4 1 Dermatology Unit University of Campania, Naples, Italy 2 Pediatric Dermatology, Ospedale dell’Angelo Venezia, Ospedale San Bortolo, Vicenza, Italy 3 Department of Dermatology and Venereology, Medical University of Bialystok, Bialystok Poland 4 Universitat Internacional de Catalunya, Barcelona, Spain Citation: Piccolo V, Grimalt R, Nowowiejska J, Cutrone M. Bilateral Facial Hair Whorls in a Child. Dermatol Pract Concept. 2024;14(3):e2024136. DOI: https://doi.org/10.5826/dpc.1403a136 Accepted: January 23, 2024; Published: July 2024 Copyright: ©2024 Piccolo et al. This is an open-access article distributed under the terms of the Creative Commons Attribution- NonCommercial License (BY-NC-4.0), https://creativecommons.org/licenses/by-nc/4.0/, which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original authors and source are credited. Funding: None. Competing Interests: None. Authorship: All authors have contributed significantly to this publication. Corresponding Author: Julia Nowowiejska, MD, PhD, Department of Dermatology and Venereology, Medical University of Bialystok, Zurawia 14 St, 15-540 Bialystok. E-mail: julia.nowowiejska@umb.edu.pl Case Presentation A 6-year-old Bangladeshi boy, in good general condition, presented to the outpatient clinic for a hypopigmented patch of the abdominal region, compatible with nevus depigmento- sus, but there were also two patches of bilateral hair whorls in the sideburns area. No other significant dermatological signs were observed. Teaching Point Hair whorls are a physiological condition well described in the literature [1]; they are usually localized on the scalp, in the parietal region, usually single and clockwise. Anterior localization, different from the more common localizations, has been considered a possible marker of NF1 [2]. Several pathogenetic theories have been proposed for hair whorls, including the most accepted ‘mechanical tension’ theory (stretching of the epidermis during the rapid expansion of the cranium while the hair follicle grows downward into deeper tissues), or ‘inheritance’ theory (genetic predisposition) [1]. We were not able to find another report of localization of hair whorls in the beard area in the literature (probably also due to the scarcity of facial hair in children) which could pose problems in differential diagnosis. Medline search with the keywords ‘facial hair whorl’, ‘beard whorl’, ‘facial hair vortex’ does not allow to find re- ports of this variant. We describe an unusual case of the presence of bilateral hair whorls on the face of a child (apparently healthy except for nevus depigmentosus) (Figure 1). Further observations will be needed to evaluate if this is a normal variant or if the facial hair whorl represents a possible marker of another associated genetic condition. 2 Image Letter | Dermatol Pract Concept. 2024;14(3):e2024136 References 1. Samlaska CP, James WD, Sperling LC. Scalp whorls. J Am Acad Dermatol. 1989;21(3 Pt 1):553-556. DOI: 10.1016/s0190- 9622(89)70225-5. PMID: 2674215. Figure 1. (A-D) Bilateral facial whorls (A,B), with correspondent dermatoscopy (C). Nevus depigmentosus of the abdomen in the same patient (D). 2. Sechi A, Neri I, Patrizi A, et al. Scalp hair whorl patterns in patients affected by Neurofibromatosis Type 1: A case-control study. Int J Trichology. 2020;12(2):56-61. DOI: 10.4103/ijt .ijt_25_20. PMID: 32684676. PMCID: PMC7362971.