Purpura, petechiae, ecchymoses

In line with the previous post, what is actually purpura? What about petechiae? And ecchymoses?Different from those non-purpuric rash, the purpuric rash usually DO NOT blanch with pressure.One of the ways to perform blanching is by the glass test. The picture shown is taken from this article - click here for the article. Click on the image to go to its image location.Depending on their size,

Henoch-Schönlein purpura

Case: This 7-years old boy was seen in the emergency department about a month ago with the main complaint of sudden onset of colicky abdominal pain. After been given pain relief, his abdomen was soft, non tender and non guarded. He was, otherwise, fully alert and conscious; vital signs are normal, not toxic looking and no signs of meningisms. The easy part is he has been suspected of