Lichen planus pigmentosus

Lichen planus (LP) pigmentosus is a rare variant of cutaneous lichen planus (see this term) characterized by the presence of hyperpigmented lichenoid lesions in sun-exposed or flexural areas of the body.

Erythema

Redness of the skin, caused by hyperemia of the capillaries in the lower layers of the skin.


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PMID (PMCID)
26831572
 FEMALE Adult
Macular pigmentation of uncertain aetiology revisited: two case reports and a proposed algorithm for clinical classification.
Chandran V, Kumarasinghe SP.
Australas J Dermatol. 2017;58(1):45-49.
Ashy dermatosis, erythema dyschromicum perstans, lichen planus pigmentosus and idiopathic eruptive macular pigmentation are various types of acquired macular hyperpigmentation disorders of the skin described in literature.
28210390
 OTHER
A Case of Lichen Planus Pigmentosus with Facial Dyspigmentation Responsive to Combination Therapy with Chemical Peels and Topical Retinoids.
Wolff M, Sabzevari N, Gropper C, Hoffman C.
J Clin Aesthet Dermatol. 2016;9(11):44-50.
Although there has been some debate, lichen planus pigmentosus is considered by many to be a separate diagnostic entity from ashy dermatosis or erythema dyschromicum perstans, which shares similar characteristics.
26588340
(4894801)
 MALE Adult
"Melanocytic Nests Arising in Lichenoid Inflammation": Reappraisal of the Terminology "Melanocytic Pseudonests".
Chung HJ, Simkin AD, Bhawan J, Wolpowitz D.
Am J Dermatopathol. 2015;37(12):940-3.
The authors have previously proposed the term melanocytic pseudonests to describe junctional nests with numerous (>2) true melanoma antigen recognized by T cells-1/Melan-A, SOX10, and MITF in a nonmelanocytic lesion with lichenoid inflammation (unilateral lichen planus pigmentosus/erythema dyschromicum perstans).
21812802
 MALE Middle Aged
Nests with numerous SOX10 and MiTF-positive cells in lichenoid inflammation: pseudomelanocytic nests or authentic melanocytic proliferation?
Silva CY, Goldberg LJ, Mahalingam M, Bhawan J, Wolpowitz D.
J Cutan Pathol. 2011;38(10):797-800.
Clinically felt to represent unilateral lichen planus pigmentosus/erythema dyschromicum perstans and not malignant melanoma in situ, this lesion highlights the importance of clinicopathologic correlation and suggests either a new melanocytic entity or a novel pattern of benign melanocytic reorganization in a subset of lichenoid dermatitides.
18032859
 MIXED_SAMPLE Child
Idiopathic eruptive macular pigmentation with papillomatosis: Report of nine cases.
Joshi R.
Indian J Dermatol Venereol Leprol. 2007;73(6):402-5.
The clinical diagnoses rendered by the referring physicians were lichen planus pigmentosus, urticaria pigmentosa, erythema dyschromicum perstans and postinflammatory hyperpigmentation.
9865868
 MIXED_SAMPLE Adult
Reticulate postinflammatory hyperpigmentation with band-like mucin deposition.
Noto G, Pravata G, Arico M.
Int J Dermatol. 1998;37(11):829-32.
These findings may draw attention to pigmentary disorders such as lichen planus pigmentosus, erythema dyschromicum perstans, pigmentatio maculos eruptiva idiopathica, dermatopathia pigmentosa reticularis, prurigo pigmentosa and frictional melanosis.