Hailey-Hailey Disease Presenting as Lichenoid Plaques on the Thigh.

A 40-year-old woman presented with multiple itchy violaceous papules and plaques on the medial aspects of both thighs. This was accompanied by a burning sensation on friction and increased itching that interfered with her daily activities, particularly in the summer. The family history was noncontributory. Cutaneous examination showed multiple flat-topped hyperkeratotic violaceous papules and plaques, appearing in linear fashion on the medial aspects of the thighs bilaterally (Figure 1). Histopathologic examination showed acanthosis, widespread suprabasal acantholysis resembling a "dilapidated brick wall," without any evidence of dyskeratosis. There was a mild dermal perivascular infiltrate (Figure 2). On the basis of the clinical and histologic findings, she was diagnosed as having localized Hailey-Hailey disease. She was treated conservatively with topical corticosteroids and antimicrobials. She was also advised to lose weight, to avoid friction, and to wear loose-fitting cotton garments. There was marked symptomatic relief, and the lesion showed mild improvement over the next 2 months.