10.5826/dpc.1401a70
text/xml
2160-9381
3673
en
Işıl Karaarslan
https://creativecommons.org/licenses/by-nc/4.0
Dermatology Practical & Conceptual
Dermoscopic Features of Pilar Sheath Acanthoma
Text.Serial.Journal
https://dpcj.org/index.php/dpc
Image Letter
2024-01-31
2023-07-11
2024-01-31
2024-02-21
e2024070
Dermatol Pract Concept
Işıl Karaarslan
2024/01/31
10.5826/dpc.1401a70
e2024070
Ege University, Faculty of Medicine, Department of Dermatology, İzmir, Turkey
2160-9381
en
e2024070
Jo-Velasco M, Corrales-Rodríguez A, Francés-Rodríguez L, Alegría-Landa V, Eraña-Tomás I, Rütten A, Requena L. Plaque-Like Pilar Sheath Acanthoma: Histopathologic and Immunohistochemical Study of 3 Unusual Cases. Am J Dermatopathol. 2018 Feb;40(2):125-130.
Dermoscopic Features of Pilar Sheath Acanthoma
https://dpcj.org/index.php/dpc/article/download/3673/2537
   Dermoscopic Features of Pilar Sheath Acanthoma
                    Göktürk Oraloğlu1, Nilay Duman2, Banu Yaman3, Işıl Karaarslan2


1 Siirt Training and Research Hospital, Department of Dermatology, Siirt, Turkey
2 Ege University, Faculty of Medicine, Department of Dermatology, İzmir, Turkey
3 Ege University, Faculty of Medicine, Department of Pathology, İzmir, Turkey



Citation: Oraloğlu G, Duman N, Yaman B, Karaarslan I. Dermoscopic Features of Pilar Sheath Acanthoma. Dermatol Pract Concept.
2024;14(1):e2024070. DOI: https://doi.org/10.5826/dpc.1401a70
Accepted: August 21, 2023; Published: January 2024
Copyright: ©2024 Oraloğlu 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: Nilay Duman, Ege University, Faculty of Medicine, Department of Dermatology, Bornova, İzmir, Turkey.
Tel: + 90 (232) 390 38 30 Phax: + 90 (232) 339 97 02 E-mail: nilyduman@gmail.com; nilay.duman@ege.edu.tr




Case Presentation                                                        asymptomatic benign nodule with a central pore-like opening
                                                                         plugged with keratin, mostly seen in middle-aged individuals
A 65-year-old male patient presented with a 3-mm dome-                   on the upper lip (1). Its non-specific clinical appearance may
shaped cribriform pinkish nodule on the back side of his                 resemble other skin tumors such as basal cell carcinoma (2).
right leg (Figure 1A). Dermoscopy revealed thin hairpin-like             Our case lacked a typical central pore-like opening feature
vessels on the periphery, polymorphous vessels including lin-            clinically and revealed polymorphous vessels and white struc-
ear curved, coiled, and hairpin vessels, and a few white clods           tures that correlate with the fibrovascular septae at stroma
at the center on a pinkish background (Figure 1B/C). Differ-             surrounding the tumor histopathologically. These dermo-
ential diagnosis included squamous cell carcinoma, inverted              scopic features are non-specific and may also be observed in
follicular keratosis and melanoma. The lesion was excised                malignant tumors such as melanoma, metastases, and SCC.
and histopathological examination revealed pilar sheath                  Therefore, histopathological examination remains the gold
acanthoma.                                                               standard for diagnosing PSA. Our case findings show that
                                                                         PSA may have prominent vasculature on dermoscopy resem-

Teaching Point                                                           bling malignant skin tumors. More reports are needed to de-
                                                                         fine the typical features of PSA in order to differentiate this
Pilar sheath acanthoma (PSA) is a rare benign f­ollicular                tumor from other malignant tumors just by dermoscopy and
neoplasm presented as a solitary, small, skin-colored,                   thus to avoid unnecessary excisions in the future.




Image Letter | Dermatol Pract Concept. 2024;14(1):e2024070                                                                            1
Figure 1. (A) 3 mm dome-shaped cribriform pinkish nodule on the back side of the right leg, (B, C) thin hairpin-like vessels on the periphery
and polymorphous vessels at the center on a pinkish background and also whitish clods observed on non-polarized light (DermLite Foto
System, 3Gen, San Juan Capistrano, CA, USA).




References                                                               2. Jo-Velasco M, Corrales-Rodríguez A, Francés-Rodríguez L,
                                                                            Alegría-Landa V, Eraña-Tomás I, Rütten A, Requena L. Plaque-
 1. Mehregan AH, Brownstein MH. Pilar sheath acanthoma. Arch                Like Pilar Sheath Acanthoma: Histopathologic and Immuno-
    Dermatol. 1978 Oct;114(10):1495-7.                                      histochemical Study of 3 Unusual Cases. Am J Dermatopathol.
                                                                            2018 Feb;40(2):125-130.




2                                                                              Image Letter | Dermatol Pract Concept. 2024;14(1):e2024070
