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Prognostic Factors of Paraneoplastic Pemphigus

Arch Dermatol. 2012;():1-8. doi:10.1001/archdermatol.2012.1830

ABSTRACT

Objective To identify the prognostic factors of overall survival in a series of patients with paraneoplastic pemphigus (PNP).

Design Multicenter retrospective cohort study.

Setting Twenty-seven dermatology departments in France.

Patients A total of 53 patients (31 men and 22 women; median age, 59 years; age range, 30-88 years) were diagnosed as having PNP between 1992 and 2010.

Main Outcome Measures Overall Kaplan-Meier survival rates were estimated, and features associated with survival were assessed using univariate (log-rank test) and multivariate (Cox regression) analyses.

Results The study included 53 patients with PNP. Thirty-six patients (68%) died during the study. The 1-, 3-, and 5-year overall survival rates were 49%, 41%, and 38%, respectively. The main causes of death were infections (n = 21) and evolution of neoplasia (n = 6). In univariate analysis, the main detrimental prognostic factors identified were erythema multiforme–like skin lesions (P = .05) and histologic keratinocyte necrosis (P = .03). None of the 5 patients with Castleman disease died during the study. After adjustment for age and sex in multivariate analysis, erythema multiforme–like skin lesions remained predictive of fatal outcome, with a 2-fold increase in death rate (hazard ratio [HR], 2.3; 95% CI, 1.05-5.03; P = .04). The prognosis of patients with PNP was even poorer when erythema multiforme–like skin lesions were associated with severe skin or mucosal involvement at presentation (HR of death, 3.0; 95% CI, 1.01-8.92; P = .049).

Conclusion Patients with PNP with erythema multiforme–like skin lesions and histologic keratinocyte necrosis, especially when associated with extensive lesions at presentation, are likely to have a more severe and rapid fatal outcome and should be managed very carefully.

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Mesa de redacción de Piel Latinoamericana. Donde recibimos casos, aportes e información de interés para la comunidad latinoamericana dermatólogica

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