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Two cases of lichen planus pigmentosus presenting with a linear pattern
Sungho Hong1, Jeong Hyun Shin, Hee Young Kang
1Department of Dermatology, Ajou University School of Medicine, 5 Wonchon-dong, Paldal-gu, Suwon 442-721, Korea.
Journal of Korean Medical Science
|February 18, 2004
Summary
Two cases of lichen planus pigmentosus (LPP) presented with a rare unilateral linear pattern. This finding expands the known clinical presentations of LPP, aiding in diagnosing similar hyperpigmented skin lesions.
Area of Science:
- Dermatology
- Pathology
Background:
- Lichen planus pigmentosus (LPP) is a chronic inflammatory skin condition characterized by hyperpigmentation.
- Typical LPP lesions present as macules or patches, often on the face and neck.
Observation:
- Two patients presented with unilateral linear brown macules on their extremities.
- The lesions followed a distinct linear distribution on one side of the body.
Findings:
- Skin biopsies revealed orthokeratosis, basal hydropic degeneration, and numerous melanophages.
- These histological findings are consistent with LPP, but the unilateral linear presentation is novel.
Implications:
- This report describes the first known cases of LPP presenting in a unilateral linear pattern.
- Clinicians should consider LPP in the differential diagnosis of unilateral linear hyperpigmented lesions.