| • | fairly common; typically begins in spring |
| • | new lesions appear hours to days after sun exposure (and resolve over 1 to 7 days without scarring) |
| • | lesions generally occur symmetrically and usually affect only some exposed sights, often those normally covered in winter such as the upper chest and arms; often sparing face |
| • | several morphologic variants (hence “polymorphous”): papular form most common, papulovesicular, plaque etc… with one type of lesion predominating in a given individual |
| • | ddx: SCLE, Jessner’s (vs. persistent plaque like PMLE), solar urticaria (much more rapid evolution and resolution) |
| • | hydroa vacciniforme: might represent a “scarring” variant of PMLE |
| • | actinic prurigo: probably an “excoriated” variant of PMLE |
hereditary pmle
| • | native Americans; autosomal dominant |
| • | indistinguishable clinically from actinic prurigo except that it persists much more frequently into adulthood |
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