The zonal anatomy of the prostate in man and in the rhesus monkey (Macaca mulatta).

Study of whole sections of human prostate has confirmed McNeal's (4) concept of a dual morphology of the external glands (2) in the terms of a central zone cranially and a peripheral zone caudal to this. A study of the non-human primate, Macaca Mulatta, has shown cranial and caudal prostatic entities in this animal whose anatomical relationships and histological characteristics suggest homology with the central and peripheral zones of the human.