Polymorphous light eruption and benign summer light eruption in Italy.

Authors:
Marcella Guarrera
Marcella Guarrera
University of Genoa
Italy
Pasquale Cardo
Pasquale Cardo
University of Genoa
Italy
Alfredo Enrico Rebora
Alfredo Enrico Rebora
University of Genoa
Italy
Donatella Schena
Donatella Schena
University of Verona
Italy
Piergiacomo Calzavara-Pinton
Piergiacomo Calzavara-Pinton
University of Brescia
Italy
Marina Venturini
Marina Venturini
University of Brescia
Italy
Giuseppe Monfrecola
Giuseppe Monfrecola
University of Naples Federico II
Italy
Antonello Baldo
Antonello Baldo
University of Naples Federico II

Photodermatol Photoimmunol Photomed 2011 Feb;27(1):35-9

Department of Endocrinological and Medical Sciences, University of Genoa, Genoa, Italy.

Background/purpose: Polymorphous light eruption (PLE) heterogeneity has been postulated, but the existence of benign summer light eruption (BSLE) is controversial. We studied the prevalence of the clinical patterns, criteria distinguishing BSLE from PLE, and diagnostic usefulness of phototest.

Methods: Five Italian Photodermatology Centres recruited retrospectively 346 patients with typical clinical history and/or presentation of PLE. Age, gender, skin type, family history and presence of atopy were considered. UVA and UVB MEDs and provocative phototests with UVA and UVB were obtained with a standardized procedure. Photopatch tests were applied according to the IRCDG rules. ANA were assessed by indirect immunofluorescence.

Results: Four criteria (predominance of women, shorter latency, uninvolvement of the face and absence of relapse during summer) identified BSLE in only 6.1% of cases. All had positive phototests, mostly with UVA. Uninvolvement of face, short latency and no seasonal relapses identified 11.7% patients, mostly with positive phototests to UVA. Short latency and no seasonal relapses in women identified 11.2% patients. Uninvolvement of face and no seasonal relapses in women identified 8.1% of patients. Uninvolvement of face and short latency in women identified 17.6% of patients.

Conclusion: Criteria diagnosed BSLE in only a minority of patients, who were positive at phototesting, mostly with UVA.

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http://dx.doi.org/10.1111/j.1600-0781.2010.00562.xDOI Listing

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February 2011
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