Prostate disorders

Abstract

The prostate is composed of four anatomical zones, the anterior fibromuscular stroma without glandular tissue, the transitional zone which surrounds the urethra and normally contains about 5% of the glandular tissue, the central zone in the midportion (20% of glandular tissue), and the peripheral zone which contains 75% of the glandular tissue and is predominantly located posteriorly and along the lateral outer portion of the prostate (McNeal et al. 1988). For practical purposes on imaging, the central and transitional zones are often combined into the term central gland, as they cannot be differentiated on imaging.