BOS: Buschke-Ollendorff syndrome INTRODUCTION First reported in 1928, Buschke-Ollendorff syndrome (BOS) is an autosomal dominant genodermatosis with high penetrance and variable expressivity. It is characterized by skin-colored or yellow smooth papules, plaques, and nodules up to 2 cm consisting of elastomas or collagenomas, known as dermatofibrosis lenticularis disseminata. This syndrome also ...