what great news! Its good to get that biopsy done, like u say if it turns out to be something other than cancer mets then at least the treatment u get will be appropriate, worth waiting a week or so for.
Also always a good feeling when the bone scan comes back clear. My secondaries were found in the lungs back in Jan LAST year (2010) and after initial 6 months of taxotere chemo every 3 monthly scan remains relatively clear (oncol wont get the microscope out and look too closely, but nothing obvious is showing) my bone scans are the same and Doc can't believe that it hasn't spread to my bones by now, happy about it, but can't believe it! we are just working on brain mets now-with success so far...hoping to be about for quite a while yet :)
Good luck with the biopsy
Sam :)