Biopsy procedures will be performed in local anaesthesia using 6-10 ml 2% Lidocaine. Using ultrasound control, local anaesthetic is injected around the prostate using a 22-gauge spinal needle. Prostate volume is calculated using the standard ellipsoid formula, multiplying the largest anterioposterior (height), transverse (width) and cephalocaudal (length) prostate diameters by 0,524.