This recent paper in the journal Stroke introduces the blend sign as a very good predictor of haematoma growth after intracerebral haemorrhage (ICH). It is seen on early un-enhanced CT head scans as a blending of hypoattenuating area and hyperattenuating region with a well-defined margin.
Above is what an intracerebral haemorrhage looks lie on brain imaging. For the blend sign itself, click here. It makes for a very nice buzzword, but see what you make of it. If you are not impressed, then let the blend mean only one thing!