malar rash (butterfly rash)
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Introduction
Butterfly shaped rash on face (maxillary nerve distribution)
Etiology
- 46-65% of patients with systemic lupus erythematosus
Clinical manifestations
- red or purplish & mildly scaly rash
- shape of a butterfly
- involves the bridge of the nose
- spares the nasolabial folds of the face & areas beneath the nose & lower lip
* images[3]
Laboratory
- antinuclear antibody (ANA) & further testing for systemic lupus erythematosus if positive
Differential diagnosis
- disorders not sparing nasolabial folds
- rosacea (facial flushing that flares with strong emotion, hot drinks)
- dermatomyositis (heliotrope rash, Grotton's papules)
- erythema infectiosum due to parvovirus B19 infection (slapped cheek rash)
More general terms
Additional terms
References
- ↑ Medical Knowledge Self Assessment Program (MKSAP) 14, American College of Physicians, Philadelphia 2006
- ↑ Wikipedia: Malar rash http://en.wikipedia.org/wiki/Malar_rash
- ↑ 3.0 3.1 Goglin SE, Margaretten ME Images in Clinical Medicine: Malar Rash N Engl J Med 2021; 385:164. July 8 PMID: https://www.ncbi.nlm.nih.gov/pubmed/34233099 https://www.nejm.org/doi/full/10.1056/NEJMicm2029589