The prostate is a small gland located just below the bladder. The gland is only found in men. It is shaped like a doughnut and surrounds the urethra, the tube through which urine flows. The prostate reaches its adult size by the age of 20 and weighs a little less than one ounce.
Zonal marking Zonal marking is a defensive strategy where defenders cover an area of the pitch rather than marking a specific opponent. If an opponent moves into the area a defender is covering, the defender marks the opponent.
T2-weighted MRI. Prostate zonal anatomy is best demonstrated with MRI. On T2-weighted sequences, the normal prostate can be divided into the peripheral zone, which shows high signal intensity owing to its high water content, and the central gland (comprising central and transition zones), which has lower signal intensity (Figure 3).