Abstract
Background
The differential diagnosis between palmar psoriasis (PP), chronic hand dermatitis (CHE), and hyperkeratotic hand dermatitis (HHD) is challenging.
Objectives
We sought to distinguish the histopathological and immunohistochemical characteristics between PP, CHD, and HHD.
Materials & Methods
Hands, clinically diagnosed with PP, CHD, or HHD, were further evaluated using skin biopsy sections based on haematoxylin and eosin staining and immunohistochemical analysis for β-defensin 2 and interleukin-36γ.
Results
Confluent parakeratosis, absent granular layer, and psoriasiform epidermal hyperplasia were more common in PP and HHD relative to CHE. The level of β-defensin 2 expression in the stratum corneum and interleukin-36γ in the stratum granulosum was higher in PP and HHD relative to CHD.
Conclusion
Considering the similarities of histopathological and immunohistochemical findings, HHD may be an inflammatory disorder with a pathogenesis similar to that of PP, rather than CHD.
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Funding sources: this research was supported by Hallym University Research Fund (HURF-2018-02). Conflicts of interest: none.
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An, M.K., Yoon, J.H., Park, E.J. et al. Differential histopathological and immunohistochemical findings between palmar psoriasis and chronic hand eczema. Eur J Dermatol 30, 710–715 (2020). https://doi.org/10.1684/ejd.2020.3769
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DOI: https://doi.org/10.1684/ejd.2020.3769