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Disseminated superficial actinic porokeratosis in a patient undergoing treatment with long-term narrowband ultraviolet B for psoriasis
Type:Uv phototherapy Time:2014-12-08 11:57:48Disseminated superficial actinic porokeratosis in a patient undergoing treatment with long-term narrowband ultraviolet B for
psoriasis.
Kawara S1, Oiso N, Kawada A.
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Abstract
Disseminated superficial actinic porokeratosis (DSAP) is a subtype of porokeratosis, thought to be clonal disorder of
keratinization. Chronic exposure to ultraviolet (UV) light might be an etiological cause of DSAP, of which frequent sites are
sun-exposed areas. We report a case of DSAP that occurred on the trunk of a 79-year-old man with psoriasis treated with
narrowband ultraviolet B (NB-UVB) for clearing and maintenance therapies. DSAP has been reported to associate with psoralen
and ultraviolet A therapy and broadband UVB, but not NB-UVB. This may be the first case of DSAP after repeated exposure to
NB-UVB.
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