[Histonet] sentinal nodes with pigment

[Tague, Curtis]

a friend of mine was asking if i knew anything about sentinal nodes that have a large amount of heavy black pigment. melanoma nodes specifically, which can create a problem when diagnosing. seems to think it might have something with the radioactive tracer that is used and the pH of some of the chemicals. anyone have any idea what might cause this. i'm told that there is no problem in any other tissues, just the sentinal nodes.

i, in my limited knowledge, could not answer the question so i told him i'd ask the worlds great experts.... the histonet.

thanks, 
curt

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