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Targetoid hemosiderotic hemangioma is an acquired vascular malformation of unknown origin. We report the case of a 31-year-old man with a recurrent and spontaneous regressive targetoid hemosiderotic hemangioma. Diagnosis relied on clinical and histological findings. Physical examination revealed presence of an approximately 2 cm targetoid lesion located on the left arm, and associated with pain after pressure. No trigger agent (trauma, insect sting) was reported. Dermoscopy showed a group of red lacunae centrally, encircled by an int

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Regardless of the shape of the closed loops, such topological wetting states can always arise due to the topological invariant (i.e., all closed loops entail the same topological genus value). This unusual wetting behavior is contrary to the conventional view (and to the prediction of the Wenzel equation), namely, a rough hydrophilic surface should have stronger hydrophilicity than its flat-surface counterpart.Brassinosteroids (BRs) are known to regulate plant growth and development. However, only little is known about their mechanism in the regulation of b