Frequency
Age
Sex
Race
Although pseudoporphyria has no predilection toward any one race, it has been shown that fair- skinned children who are highly prone to sunburn are more likely to develop naproxen-induced pseudoporphyria than those children with skin types III or higher. Wallace et al demonstrated that even in the absence of a history of blistering, children with light skin and blue or green eyes are at an increased risk of developing shallow scars on the face while taking naproxen.
The ages of patients reported with pseudoporphyria range from 2-81 years. It has been reported that the mean age at diagnosis was 50 years in a retrospective study of 20 cases.
Pseudoporphyria is not uncommon. Although fewer than 100 cases are documented, pseudoporphyria is most likely underreported in the literature.
Pseudoporphyria affects males and females equally.
