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Comparison of vascular endothelial growth factor expression between lesional and non-lesional skin in patients with morphea: a dermoscopy-guided immunohistochemical study

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Abstract

Morphea is an inflammatory fibrosing disease, initiated by vascular injury resulting in increased collagen formation and decreased collagen degradation. This study was designed to evaluate the role of angiogenic vascular endothelial growth factor (VEGF) in the vascular changes which are dermoscopically evident in morphea lesions, compared with that in non-lesional skin, by assessing its expression immunohistochemically on tissue blood vessels. Twenty patients with morphea were subjected to clinical and dermoscopic examinations. Two skin biopsies from lesional and non-lesional skin were obtained and stained with hematoxylin and eosin (H&E) and immunohistochemically with VEGF. Dermoscopic examination showed linear blood vessels in 90% of the lesions. No significant difference in the number of VEGF-stained and unstained blood vessels, was observed between the lesional and non-lesional skin (p = 0.475 and 0.191, respectively). A weak inverse correlation was found between the total number of blood vessels positive for VEGF and the disease duration, (r =  − 0.48; p = 0.032). Significant differences were found between different stages of morphea and total number of blood vessels negative for VEGF, (p = 0.017). In conclusion, VEGF immunostaining, which represents the newly formed blood vessels, showed no difference between lesional and non-lesional skin in patients with morphea. Thus, the dermoscopically observable blood vessels in lesions compared with non-lesional skin are not due to angiogenesis, but rather due to the thinning and atrophy of the overlying epidermis in morphea cases, rendering the blood vessels more obvious.

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Contributions

MB: contributed to the research idea, dermoscopic evaluation of the patients, data analysis, writing of the first draft of the manuscript, manuscript revision; SS: performed the histopathological examination of all patients; AO: collected the patients` information, did the dermoscopic examination and collected the patients` biopsies; MAS: contributed to the research idea, revised the manuscript and submitted the manuscript.

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Correspondence to Marwah Adly Saleh.

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This work was approved by the Dermatology Department of Cairo University.

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All patients provided informed consent to participate in this study.

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Bosseila, M., Okail, A., Sayed, S. et al. Comparison of vascular endothelial growth factor expression between lesional and non-lesional skin in patients with morphea: a dermoscopy-guided immunohistochemical study. Arch Dermatol Res 315, 61–66 (2023). https://doi.org/10.1007/s00403-021-02315-x

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  • DOI: https://doi.org/10.1007/s00403-021-02315-x

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