Akay Bengu Nisa, Mart Handan Merve Erol, Heper Aylin Okcu
Department of Dermatology, Faculty of Medicine, Ankara University, Ankara, Turkey.
Department of Pathology, Faculty of Medicine, Ankara University, Ankara, Turkey.
Dermatol Pract Concept. 2025 Apr 1;15(2):5071. doi: 10.5826/dpc.1502a5071.
Eccrine poroma (EP) is a benign adnexal tumor. Establishing a definitive diagnosis based on clinical and dermoscopic findings can be challenging.
The aim of this study was to perform a comprehensive analysis of the dermoscopic features of pigmented, hypopigmented, and nonpigmented variants of EP and to compare these dermoscopic features in patients with dark and light Fitzpatrick skin phototypes.
A total of 26 cases of histopathologically confirmed EP were included. Each case was categorized as pigmented, hypopigmented, or nonpigmented based on the melanin content within the lesion. Patients were classified according to their Fitzpatrick skin phototypes. Dermoscopic images were subjected to revised pattern analysis, and the results were compared with the existing literature.
Regarding Fitzpatrick skin phototype, four (15.4%), 11 (42.3%), six (23.1%), and five (19.2%) patients had Fitzpatrick skin phototypes II, III, IV, and V, respectively. Of the cases, 17 (65.4%) were classified as nonpigmented, three (11.5%) as hypopigmented, and six (23.1%) as pigmented EP. All pigmented EP cases occurred in patients with dark skin and were located on non-acral sites. Polymorphic vascular pattern, branched vessels with rounded endings, linear-irregular vessels, interlacing white areas around vessels, and collarettes were more frequently observed in patients with light skin. In contrast, clod vessels, coiled vessels, white lines, ulceration, fiber sign, scales, and structureless areas were more common in patients with dark skin.
This study underscores the significant dermoscopic diversity observed in EP, revealing distinct patterns based on pigmentation and Fitzpatrick skin phototypes.
小汗腺汗孔瘤（EP）是一种良性附属器肿瘤。基于临床和皮肤镜检查结果做出明确诊断可能具有挑战性。
本研究旨在对色素沉着型、色素减退型和无色素型EP的皮肤镜特征进行全面分析，并比较不同Fitzpatrick皮肤光类型患者的这些皮肤镜特征。
共纳入26例经组织病理学确诊的EP病例。根据病变内黑色素含量将每个病例分为色素沉着型、色素减退型或无色素型。患者根据其Fitzpatrick皮肤光类型进行分类。对皮肤镜图像进行修订模式分析，并将结果与现有文献进行比较。
关于Fitzpatrick皮肤光类型，分别有4例（15.4%）、11例（42.3%）、6例（23.1%）和5例（19.2%）患者的Fitzpatrick皮肤光类型为II、III、IV和V型。在这些病例中，17例（65.4%）被分类为无色素型，3例（11.5%）为色素减退型，6例（23.1%）为色素沉着型EP。所有色素沉着型EP病例均发生在肤色较深的患者中，且位于非肢端部位。多形性血管模式、末端圆形的分支血管、线性不规则血管、血管周围交织的白色区域和领口样结构在肤色较浅的患者中更常见。相比之下，粗大血管、盘绕血管、白线、溃疡、纤维征、鳞屑和无结构区域在肤色较深的患者中更常见。
本研究强调了在EP中观察到的显著皮肤镜多样性，揭示了基于色素沉着和Fitzpatrick皮肤光类型的不同模式。
