Eljazouly M, Agharbi FZ, Alj M, Oqbani K, Chiheb S. Blaschko-Linear Lichen Planus Pigmentosus: An Unusual Presentation.
Cureus 2021;
13:e20047. [PMID:
34987928 PMCID:
PMC8717938 DOI:
10.7759/cureus.20047]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/29/2021] [Indexed: 11/29/2022] Open
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.
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