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Reticulate postinflammatory hyperpigmentation with band-like mucin deposition
1Department of Dermatology, University of Palermo, Policlinico P. Giaccone, Italy.
International Journal of Dermatology
|December 29, 1998
Summary
Two patients presented with reticular pigmented macular lesions and unusual dermal mucin deposition. This suggests a potential link between pigmentary disorders and mucin accumulation, possibly a variant of lichen planus pigmentosus.
Area of Science:
- Dermatology
- Pathology
Background:
- Mucinoses involve mucin accumulation in the skin.
- Postinflammatory hyperpigmentation results from melanin loss and dermal macrophage accumulation.
Observation:
- Two patients exhibited asymptomatic, persistent, reticular, pigmented patches on flexures, thighs, neck, and back.
- Lesions were characterized by melanophages and diffuse, band-like dermal mucin deposition.
Findings:
- Histology revealed melanophages, diffuse dermal mucin deposition, increased fibroblasts, T-cell infiltrate, and mast cells.
- Negative lupus erythematosus blood markers were noted.
- The macules were not preceded by erythema or other lesions.
Implications:
- These cases highlight a potential association between pigmentary disorders and mucin deposition.
- The findings may represent a variant of lichen planus pigmentosus or frictional melanosis with secondary mucin deposition.
- This presentation expands the understanding of mucinoses and pigmentary disorders.