ischemia/necrosis vs tumor/neoplasm

[pezzang]

How do you distinugsh between the two just by looking at the gross organ?
I've looked up a few references and the only thing definite I got was that we can distinguish by location, color and shape. For general organs, namely, heart, lung, liver, spleen, prostate, bladder, we could we distinguish? I thought colorwise, they are both white..

Any insight, please...

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[noobD0c]

Shape, Surface, Color, and texture i think that how you distinguish.

 

[pezzang]

Could you briefly describe how these aspects are different? Thanks!

 

[werd]

necrotic/ischemic things tend to be "dusky" or blue/purple/black and may have some edema, but it still looks like the organ. tumors are balls or masses that don't belong on the normal organ. or can be more subltle, like loss of architecture (like a flat stomach lining vs. normal rugae). many tumors have associated necrosis.

 

[cpants]

Another gross marker of ischemic necrosis is the "wedge-shaped infarct". You look for the color and architectural changes in the same distribution as the regional vascular supply, a dead lung segment for example.