Prostate biopsy surgery. Clip 8 of 9. Surgeons carrying out biopsy surgery to obtain samples from a male patient's prostate gland. This patient has raised PSA (prostate specific antigen) levels, which is an indicator of potential problems with the prostate. This can range from benign conditions to cancer. This procedure involves inserting prostate biopsy needles through the patient's perineal skin using a template (black square). The template allows a record to be made of where the sample was taken. The needles are guided to the prostate gland using a trans-rectal ultrasound probe (grey). This clip shows the biopsy needles being removed and handed over for processing. This processing (lower left) involves transferring the samples from the needles to vials. The samples will be tested for cancerous cells. The same process is used to insert radioactive sources to kill any cancerous cells that are present. For the entire sequence see clips K003/1548 to K003/1556.