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Localized morphoea preceded by a pigmented purpuric dermatosis.
H K Bell1, C M Dobson, S P Jackson
1Department of Dermatology, Royal Liverpool University Hospital, Liverpool, UK. fam.shaw@virgin.net
Clinical and Experimental Dermatology
|June 26, 2003
Summary
This study reports a rare case where lichen aureus, a type of pigmented purpuric dermatosis, evolved into localized morphoea. Both conditions appeared in a linear distribution, potentially triggered by chronic trauma.
Area of Science:
- Dermatology
- Pathology
Background:
- Localized morphoea typically presents without a clear cause, though trauma is an uncommon trigger.
- Linear morphoea and pigmented purpuric dermatoses, like lichen aureus, can rarely manifest in linear patterns and may be linked to trauma.
Observation:
- A middle-aged male patient presented with linear lichen aureus lesions on an area of chronic low-grade trauma.
- The purpuric eruption resolved spontaneously over time.
Findings:
- The patient later developed localized morphoea in the exact same linear distribution.
- This case represents the first documented instance of a pigmented purpuric dermatosis, possibly trauma-induced, progressing to linear morphoea.
Implications:
- This case highlights a potential, previously unreported, sequential relationship between trauma-induced pigmented purpuric dermatoses and linear morphoea.
- It suggests that chronic low-grade trauma may play a role in the pathogenesis of both conditions, potentially acting as a trigger for morphoea development after an initial purpuric phase.