Can a hemotoma be from something besides injury?

Answer 1

I guess that depends on how you define "injury". A hematoma is a collection of blood outside of a vessel, so generally, that would be from an injury, whether a simple bruise or petechiae (which I had around my eyes when I had gastritis secondary to repeated and strong vomiting). Sometimes patients having femoral access catheters/sheaths removed can develop hematomas from the blood not adquately clotting, therefore leaking into tissue. I suppose that doesn't fall into the category of "injury"... at least, not what people in general call injury. However, technically, simply accessing a vessel, even for a small gauge IV, causes endothelial injury. Was that a round-about enough answer?!