Dear Editor, Granuloma annulare (GA) is a granulomatous, idiopathic, inflammatory skin disorder characterized by the formation of papules and plaques with annular and acral distribution. 1 GA is often limited and self-resolving, but in some cases, it can be generalized and refractory toThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Differential diagnosis of dermatoses presenting with skin fragilityand blisters in photo-exposed areas is broad and includes porphyrias, autoimmune bullous diseases (ABD), and phototoxicities such as pseudoporphyria. 1 Pseudoporphyria is a bullous photodermatosis with a clinical presentation and histology similar to that of porphyria cutanea tarda (PCT), although with no porphyrin increase. 1,2 Pseudoporphyria is infrequent (<150 reported cases), probably underdiagnosed/underreported, and can represent a diagnostic challenge. 1,2 Here, we present a series of cases with pseudoporphyria and propose a diagnostic algorithm.
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