Blaschko-Linear Lichen Planus Pigmentosus: An Unusual Presentation.

Authors :: Eljazouly M
Agharbi FZ
Alj M
Oqbani K
Chiheb S
Source :: Cureus [Cureus] 2021 Nov 30; Vol. 13 (11), pp. e20047. Date of Electronic Publication: 2021 Nov 30 (Print Publication: 2021).
Publication Year :: 2021
Abstract: Lichen planus pigmentosus (LPP), an uncommon variant of lichen planus (LP), is characterized by diffuse hyperpigmented dark brown macules in sun-exposed areas. We report an unusual case of LPP with a blaschkoid distribution in an area of radiotherapy for breast cancer. This description is rarely reported. Its pathogeny is poorly understood and suggests an embryological origin by genetic mosaicism and also discusses the immunomodulatory role of radiotherapy in the disease.<br />Competing Interests: The authors have declared that no competing interests exist.<br /> (Copyright © 2021, Eljazouly et al.)