Prayers for Paxil..hopefully they're just benign.. I've been through the exact same thing with Bear. We removed a large mast cell tumor (also the aggressive type) where they didn't manage to get full margins because of the size, and we played a wait and see game. Sure enough w/i about 8 months I found 2 more lumps. I think I invented a few curse words when I found those so believe me I understand the need. Feel free to PM me if you need to just vent. The good news which might give you some hope for Paxil is that those 2 new lumps were benign. Over the past 4 years he's gotten about 10-12 over his body, all benign so it is possible they might not be cancerous even with Paxils history. Fingers and paws crossed.