Familial benign chronic pemphigus (Hailey-Hailey disease).

We present an atypical case of familial benign chronic pemphigus (Hailey-Hailey disease) that manifested with relapsing, flaccid vesicles and erosions, which were limited to the upper chest, anterior aspect of the neck, and anterior aspects of the upper arms without intertriginous involvement. Although individual eruptions in this patient demonstrated asymmetry, relapses did not obey a segmental distribution. To the best of our knowledge, no other patient has been described with symmetric lesions that were localized solely to the anterior upper body without a prior history of lesions at commonly affected disease sites, which include skin folds, the back, and the posterior and lateral aspects of the neck. This unusual presentation of Hailey-Hailey disease highlights the variable nature of the disease.