I'm no expert, but taking 6 cores seems an insufficient number to take. Should you go for a biopsy again down the road, after 3 to 6 months, ensure the uro takes at least 12. My first, and only biopsy, had one core of 12 initial Gleason 3+3 =6. Surgery provided a clearer picture: Gleason 7 and more widespread than a positive sample in one core might suggest.