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Lichen planus pigmentosus inversus
Hugo Rocha Barros1, José Roberto Paes de Almeida2, Sandra Lopes Mattos e Dinato3
1Brazilian Society of Internal Medicine.
Anais Brasileiros De Dermatologia
|December 19, 2013
Summary
Lichen planus pigmentosus inversus is a rare skin condition presenting as asymptomatic brown spots in skin folds. This case report details its typical clinical and histological features.
Area of Science:
- Dermatology
- Pathology
Background:
- Lichen planus pigmentosus inversus (LPPI) is a rare variant of lichen planus.
- It is characterized by hyperchromic macules in intertriginous areas.
Observation:
- A 25-year-old male presented with asymptomatic brown spots in cervical, axillary, inguinal, and popliteal regions.
- Lesions appeared over nine months and were asymptomatic.
Findings:
- Pathological examination revealed hydropic degeneration of the basal layer, pigmentary incontinence, and a lymphocytic infiltrate.
- Histology was consistent with the unique lichenoid features of LPPI.
Implications:
- This case highlights the typical clinical presentation and histological findings of Lichen planus pigmentosus inversus.
- Understanding these features aids in the diagnosis of this rare dermatosis.
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