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Equestrian chilblain: another outdoor recreational hazard
Amy Y Yang1, Laurel Schwartz, Allison K Divers
1Department of Dermatology and Cutaneous Biology, Thomas Jefferson University Hospital, Philadelphia, PA 19107, USA.
Journal of Cutaneous Pathology
|February 26, 2013
Summary
Equestrian chilblain, a cold-induced skin condition, presents as painful nodules on the thighs. Histopathology reveals specific inflammatory patterns, sometimes mimicking lupus erythematosus.
Area of Science:
- Dermatology
- Pathology
Background:
- Equestrian chilblain, also known as equestrian cold panniculitis, is a rare skin condition linked to horseback riding in cold weather.
- Understanding its clinical and histopathological features is crucial for accurate diagnosis and management.
Observation:
- Two cases of healthy women presented with burning, nodular swelling on their lateral thighs after horseback riding.
- Physical examination revealed erythematous to violaceous nodules with eczema craquelé-like changes.
- Laboratory tests for autoimmune diseases were negative.
Findings:
- Punch biopsies showed superficial and deep perivascular and periadnexal lymphocytic infiltrate with subcutaneous fat extension.
- Histopathology also revealed parakeratosis, subtle spongiosis, and increased pandermal interstitial mucin.
- These findings, particularly increased interstitial mucin, resembled tumid lupus erythematosus.
Implications:
- This study characterizes the histopathologic findings of equestrian chilblain.
- It highlights the condition's potential overlap with autoimmune connective tissue diseases like lupus erythematosus.
- Further research can differentiate cold-induced panniculitis from other inflammatory dermatoses.
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