sQuiz your knowledge: Asymptomatic, bilateral, annular plaques

Figure 1. A) Two asymptomatic plaques at the root of the thighs. B) Histiocytic interstitial infiltrate in the reticular and deep dermis, and granulomas surrounding condensed collagen fibres (haematoxylin, eosin and saffron staining; x400). ychloroquine (200 mg/d), methotrexate (15 mg/w) and prednisolone (5 mg/d), was referred for evaluation of asymptomatic lesions that appeared spontaneously during the summer (figure 1A). Physical examination showed bilateral erythematous plaques on the thighs with palpable serpiginous borders. Histopathological findings revealed an histiocytic interstitial infiltrate in the reticular and deep dermis, an absence of vasculitis and granulomas surrounding condensed collagen fibres (figure 1B).