Equestrian perniosis
Alerts and Notices
Synopsis
Equestrian perniosis is localized to the lateral thighs. Rarely, buttock involvement has been reported. Red or violaceous plaques or nodules appear after cold exposure, sometimes as soon as 24-48 hours thereafter. Lesions may be accompanied by mild to moderate pruritus, burning, or tenderness, or they may be asymptomatic. Most cases are self-limited, although more severe cases can lead to blistering and ulceration. Hyperpigmentation and scarring may occur upon resolution.
Codes
ICD10CM:T69.1XXA – Chilblains, initial encounter
SNOMEDCT:
37869000 – Chilblains
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Diagnostic Pearls
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Differential Diagnosis & Pitfalls
- Cold panniculitis
- Cold urticaria
- Antiphospholipid syndrome
- Early Coumadin necrosis
- Early calciphylaxis
- Lupus profundus
- Frostbite
- Spider bite – typically unilateral
- Cellulitis – typically unilateral
- Ecthyma – typically unilateral
Best Tests
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Management Pearls
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Therapy
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References
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Last Reviewed:07/06/2017
Last Updated:07/18/2017
Last Updated:07/18/2017