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Dermoscopy and UVFD in Differentiating Palmoplantar Psoriasis and Palmoplantar Eczema

2026年5月29日更新者：Didem Kacan、Istanbul Training and Research Hospital

Comparative Evaluation of Polarized Dermoscopy and Ultraviolet-Induced Fluorescence Dermoscopy in the Differential Diagnosis of Palmoplantar Psoriasis and Palmoplantar Eczema

Palmoplantar psoriasis and palmoplantar eczema are chronic inflammatory skin diseases that may show similar findings on the palms and soles, such as redness, scaling, thickening of the skin, fissures, itching, and burning. Because these conditions can look alike, distinguishing between them in routine clinical practice may be difficult.

This prospective, single-center observational study was designed to compare polarized dermoscopic and ultraviolet-induced fluorescence dermoscopic (UVFD) findings in adult patients with palmoplantar psoriasis and palmoplantar eczema. A total of 81 patients aged 18 years and older were included: 41 patients with clinically and/or histopathologically confirmed palmoplantar plaque psoriasis and 40 patients with palmoplantar eczema.

Dermoscopic and UVFD images were evaluated to identify vascular, scaling, surface, and fluorescence-related features that may help differentiate palmoplantar psoriasis from palmoplantar eczema. The study aims to assess whether these non-invasive imaging methods can provide additional diagnostic clues to support clinical evaluation.

研究概览

地位

主动，不招人

条件

详细说明

This prospective, single-center, observational comparative study was designed to evaluate polarized dermoscopic and ultraviolet-induced fluorescence dermoscopic (UVFD) findings in the differential diagnosis of palmoplantar psoriasis and palmoplantar eczema.

Adult patients aged 18 years and older with clinically and/or histopathologically confirmed palmoplantar plaque psoriasis or palmoplantar eczema were enrolled. Patients with recent topical or systemic treatment, positive fungal examination, palmoplantar pustulosis, other confounding palmoplantar dermatoses, malignancy or immunosuppressive conditions, pregnancy, lactation, non-specific histopathological findings, or histopathological findings inconsistent with the clinical diagnosis were excluded.

Demographic and clinical characteristics, lesion localization, symptom profile, relevant dermatological history, nail involvement, and disease severity parameters were recorded. Standardized polarized dermoscopic and UVFD images were obtained using a handheld dermoscope (DermLite DL5, 3Gen Inc., San Juan Capistrano, CA, USA). Imaging was performed under standardized conditions, and predefined dermoscopic and UVFD parameters relevant to inflammatory palmoplantar dermatoses were systematically evaluated.

In polarized dermoscopy, vascular morphology and distribution, scale color and distribution, background color, yellow-brown globules, yellow-orange structureless areas, yellow-orange crusts, and hemorrhage within scales were assessed. In UVFD, scale distribution, scale pattern, dominant fluorescence color, additional fluorescence color, and white-yellow fluorescent foci were evaluated. Image assessments were performed by independent dermatologists blinded to the clinical diagnosis.

The main objective of the study is to compare polarized dermoscopic and UVFD findings between palmoplantar psoriasis and palmoplantar eczema and to identify features that may support the clinical differentiation of these overlapping palmoplantar dermatoses. The study does not assign any treatment or intervention; all imaging procedures are non-invasive and performed for observational diagnostic evaluation.

研究类型

观察性的

注册 (实际的)

联系人和位置

本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。

学习地点

土耳其（türkiye）
- Istanbul
  - Istanbul、Istanbul、土耳其（türkiye）、34000
    - Istanbul Training and Research Hospital

参与标准

研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

成人
年长者

接受健康志愿者

不

取样方法

非概率样本

研究人群

A total of 81 adult patients aged 18 years and older with clinically and/or histopathologically confirmed palmoplantar plaque psoriasis or palmoplantar eczema were included. Participants were recruited from the dermatology outpatient clinic of a tertiary care training and research hospital.

描述

Inclusion Criteria:

Age 18 years or older.
Clinical diagnosis of palmoplantar psoriasis or palmoplantar eczema involving the palms and/or soles.
For the palmoplantar psoriasis group: presence of sharply demarcated erythematous and scaly plaques on the palms and/or soles, with diagnosis confirmed clinically and/or histopathologically.
In clinically uncertain palmoplantar psoriasis cases, at least one supporting feature such as psoriatic lesions outside the palmoplantar area, psoriatic nail involvement, psoriatic arthritis, personal history of psoriasis, or family history of psoriasis.
For the palmoplantar eczema group: presence of chronic or recurrent palmoplantar eczema with hyperkeratotic and/or fissured palmoplantar plaques, with diagnosis confirmed clinically and/or histopathologically.
Ability and willingness to provide written informed consent.

Exclusion Criteria:

Age younger than 18 years.
Presence of another palmoplantar dermatosis that may interfere with the diagnosis of palmoplantar psoriasis or palmoplantar eczema.
Histopathological findings inconsistent with the clinical diagnosis, when histopathological examination was performed.

学习计划

本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。

研究是如何设计的？

设计细节

团体/队列数

队列和干预

团体/队列
Palmoplantar Psoriasis Patients with clinically and/or histopathologically confirmed palmoplantar psoriasis
Palmoplantar Eczema Patients with clinically and/or histopathologically confirmed palmoplantar eczema

研究衡量的是什么？

主要结果指标

结果测量	措施说明	大体时间
Percentage of Participants With Findings on the Predefined Polarized Dermoscopic Feature Checklist Assessed Using DermLite DL5 大体时间：At baseline / single study visit	Name of measurement: Predefined Polarized Dermoscopic Feature Checklist. Measurement tool: standardized polarized dermoscopic images obtained with a DermLite DL5 handheld dermoscope. Unit of measure: percentage of participants (%). Standardized polarized dermoscopic images will be assessed by blinded independent dermatologists using the checklist. The checklist includes vascular morphology, vascular distribution, scale color, scale distribution, background color, yellow-brown globules, yellow-orange structureless areas, yellow-orange crusts, and hemorrhage within scales. The percentage of participants with each finding will be reported separately for the palmoplantar psoriasis and palmoplantar eczema groups.	At baseline / single study visit
Percentage of Participants With Each Predefined Ultraviolet-Induced Fluorescence Dermoscopy Feature Assessed by DermLite DL5 大体时间：At baseline / single study visit	Unit of measure: percentage of participants (%). Measurement tool: standardized ultraviolet-induced fluorescence dermoscopy (UVFD) images obtained with a DermLite DL5 handheld dermoscope and assessed by blinded independent dermatologists using a predefined UVFD feature checklist. The checklist includes UVFD scale distribution, UVFD scale pattern, dominant fluorescence color, additional fluorescence color, and white-yellow fluorescent foci. The percentage of participants with each feature will be reported and compared between the palmoplantar psoriasis and palmoplantar eczema groups.	At baseline / single study visit

次要结果测量

结果测量	措施说明	大体时间
Cohen's Kappa Coefficient for Interobserver Agreement in Binary and Nominal Dermoscopic and UVFD Feature Assessment 大体时间：At baseline / single study visit	Name of measurement: Cohen's kappa coefficient for interobserver agreement. Measurement tool: blinded independent assessment of standardized polarized dermoscopic and ultraviolet fluorescence dermoscopic images using predefined feature checklists. Unit of measure: Cohen's kappa coefficient. Two blinded independent dermatologists will assess standardized images using predefined feature checklists. Cohen's kappa coefficient will be calculated separately for binary and nominal categorical checklist findings to evaluate interobserver agreement.	At baseline / single study visit
Quadratic Weighted Kappa Coefficient for Interobserver Agreement in Ordinal Dermoscopic and UVFD Feature Assessment 大体时间：At baseline / single study visit	Name of measurement: quadratic weighted kappa coefficient for interobserver agreement. Measurement tool: blinded independent assessment of standardized polarized dermoscopic and ultraviolet fluorescence dermoscopic images using predefined feature checklists. Unit of measure: quadratic weighted kappa coefficient. Two blinded independent dermatologists will assess standardized images using predefined feature checklists. Quadratic weighted kappa coefficient will be calculated separately for ordinal checklist findings to evaluate interobserver agreement.	At baseline / single study visit

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

赞助

Istanbul Training and Research Hospital

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始 (实际的)

2025年11月1日

初级完成 (实际的)

2026年4月20日

研究完成 (估计的)

2026年7月31日

研究注册日期

首次提交

2026年5月8日

首先提交符合 QC 标准的

2026年5月29日

首次发布 (实际的)

2026年6月4日

研究记录更新

最后更新发布 (实际的)