When they remove the prostate, they encase it in wax and then slice it finely. A positive margin is where where the cancerous cells are touching the wax. So yes, the concern is that in a proportion of those cases, there are also cancer cells outside the wax, which means they are still somewhere inside the patient. But not in all cases.
Poorly defined or irregular are probably better terms from a medical point of view but deformed sums it up.
But you haven’t had surgery so positive margins doesn’t apply to you.
Edited by member 21 Jul 2018 at 00:50
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