... clinical type of the disease, and is characterized by pin-head to pea-sized, rounded or irregularly-shaped, distended or flattened and stellate vesicles, occurring, for the most part, in irregular and segmental groups of three or more lesions, seated either upon apparently normal integument or upon hyperaemic or inflammatory skin. They exhibit no tendency to spontaneous rupture, but after remaining a shorter or longer time, ... — Essentials of Diseases of the Skin • Henry Weightman Stelwagon
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