alephnull said...
Djin,
Thanks for the correction, I read it wrong.
Also, my Uro almost didn't take any LNs even though I was G8 at the time of biopsy. He wisely took one, and low and behold it was positive.
The
sentinel node is the node that the lymph draining from the prostate goes to first. It's almost always among the nodes taken because, logically, it's statistically more likely to be positive than other, more distant, nodes. I asked my uro/surgeon at a visit about
surgeons who, as a policy, take
no nodes after a G6 biopsy (G6 can't metastasize)--he doesn't agree with this, because, as we know, you can be upgraded after surgery and then you'd be left with no sampling of your pelvic nodes.
As I understand it, most surgeons take all the nodes from a "template" (or "zone") according to your G score. A template is the area bounded by anatomical structures such as muscles, vessels, et. If you are a G6 the template chosen will be smaller in area than if your biopsy was high-grade, thereby yielding fewer nodes on average. My biopsy was G10 (5+5) and my doc wound up taking 16 nodes (5 on the left side, 11 right). I was downgraded to G9 (4+5) after surgery and all removed nodes were negative. So I believe the surgeon takes all the nodes in the chosen template, rather than some predetermined number of nodes.
Djin