Abstract
Fibroepithelioma of Pinkus (FEP) is a subtype of basal cell carcinoma (BCC) that can clinically resemble intradermal nevi (IDN) and fibromas. We performed a retrospective review of consecutively biopsied lesions confirmed to be FEP on histopathology diagnosed from January 1, 2008 to April 8, 2019. Clinical (n = 48), contact non-polarized dermoscopy (NPD) (n = 44), and contact polarized dermoscopy (PD) (n = 22) images from 36 patients were reviewed. Mean age was 64.5 years (SD 15.1 years, range 24–86 years) at diagnosis of first FEP lesion. Most lesions were located on the torso (n = 28, 58.3%), followed by the lower extremity (n = 9, 18.8%). The most common differential diagnoses at the time of biopsy included BCC (n = 40) and nevus (other than IDN, n = 5). Clinically, FEP were pink (95.8%), scaly (66.7%) papules (77.1%) displaying disrupted skin markings (62.5%) and absence of hair follicles (87.5%). NPD revealed serpentine (97.7%), dotted (81.8%), or polymorphous vessels (86.4%), and hypopigmented to pink lines intersecting at acute angles (HPLA) (52.3%). PD demonstrated serpentine (95.5%), dotted (86.4%), or polymorphous vessels (81.8%), shiny white lines (50.0%), and HPLA (59.1%). Classic features of BCC such as arborizing vessels (n = 2), ulceration (n = 1), shiny white blotches and strands (n = 1), blue-gray ovoid nest (n = 1), and leaf-like areas (n = 1) were uncommon. FEP often presents as scaly, erythematous papules with disrupted skin markings and absence of hair follicles. Dermoscopy reveals polymorphous vessels with shiny white lines and HPLA.
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This study was funded by the MSKCC institutional NIH/NCI Cancer Center Support Grant P30 CA008748.
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This retrospective study was performed in accordance with the 1964 Helsinki Declaration and later amendments. Institutional Review Board (IRB) approval was obtained for this study involving the review and study of existing data with a waiver for written informed consent from patients.
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Nanda, J.K., Marghoob, N., Forero Cuevas, D.M. et al. Clinical and dermoscopic features of Fibroepithelioma of Pinkus: case series with an emphasis on hypopigmented to pink lines intersecting at acute angles. Arch Dermatol Res 313, 633–640 (2021). https://doi.org/10.1007/s00403-020-02142-6
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DOI: https://doi.org/10.1007/s00403-020-02142-6