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Erythema toxicum
From Wikipedia, the free encyclopedia
| ICD-10 | P83.1 |
|---|---|
| ICD-9 | 778.8 |
| DiseasesDB | 4458 |
| MedlinePlus | 001458 |
| eMedicine | derm/139 ped/697 |
Erythema toxicum is a very common rash in infants. It appears in up to half of newborns carried to term, usually between day 2-5 after birth. The rash is composed of small pustular lesions, each on a separate reddened base. At times the appearance can raise concern that the rash could be due to herpes simplex, however the latter generally has a more clustered and vesicular appearance. In uncertain cases, a scraping of a lesion can be done and the fluid examined under the microscope. Herpes lesions will have a positive direct fluorescent antibody test. The fluid from erythema toxicum lesions will show many eosinophils. The cause of ereythema toxicum is unknown, but it is thought to be a benign condition that causes no discomfort to the infant and the rash will generally disappear spontaneously in about 2 weeks.
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