The lobes of the human prostate.
ABSTRACT A dissection technique for the huamn prostate has been developed on about one hundred male autopsies, which makes it possible to delimit two dorsal, two lateral and two median lobes, each with separate ducts. It was found that both the dorsal lobesand the lateral lobes join dorsally to the ejaculatory ducts. The median lobes are situated below the medial parts of the seminal vesicles, and are closely apposed both ventrally and dorsally of the ejaculatory ducts. The ability to delimit the prostatic lobes in man may offer new opportunities to study the relation of prostatic diseases to different lobes as well as the hormonal dependency of the separate lobes.
- SourceAvailable from: Nan B Oldereid[Show abstract] [Hide abstract]
ABSTRACT: A comparison of various parameters of prostatic and vesicular secretory function was made between the seminal plasma of young (20-25 years; n = 23) and middle-aged (50-55 years; n = 19) male volunteers. These parameters included prostatic acid phosphatase, zinc, citric acid, spermine, spermidine, putrescine (prostatic origin), fructose, and prostaglandin E (vesicular origin), in addition to protein and testosterone. Spermatozoa were counted and monitored for abnormalities. The concentration in the ejaculate of the majority of the parameters investigated did not change with age, although the total contribution to the ejaculate from the prostate and seminal vesicles was reduced significantly in the older men. The concentration of three constituents was significantly altered in the older age group: putrescine (P less than 0.001) and prostaglandin E (P less than 0.01) were reduced, while zinc levels were elevated (P less than 0.05). These changes are discussed in relation to possible disturbances of prostate function and pathology in the middle-aged man.Journal of Andrology 03/1986; 7(2):93-9. · 3.37 Impact Factor
- [Show abstract] [Hide abstract]
ABSTRACT: Prostates from eight adult males (age range 17-63 years) were employed in this investigation. Six glands were obtained from multiorgan transplantation donors at the time of organ harvesting, and two additional glands, at routine post-mortem. Microscopic examination has shown that the majority of acini in the peripheral parts of the gland were individually relatively small and lined by an epithelium two to three cells in thickness. In contrast, acini in the central part of the gland were usually large and contained numerous prominent epithelial folds within the lumen. On the basis of morphology, a clear distinction between peripheral and central acini was not observed. The distribution of autonomic ganglia both within and adjacent to the prostate was studied, and nerve cell bodies containing both acetylcholinesterase (AChE) activity and neuropeptide immunoreactivity were identified. The distribution and density of AChE-positive nerves associated with smooth muscle in either the peripheral or central parts of the prostate were indistinguishable. In addition, the majority of acini in peripheral and central regions possessed a rich subepithelial plexus of autonomic nerves. VIP-positive nerve fibers were found in relation to the epithelium lining acini in central and peripheral regions of the gland. In contrast, nerves possessing NPY immunoreactivity occurred only in relation to the smooth muscle trabeculae of the prostate.The Prostate. Supplement 02/1989; 2:5-16.
- [Show abstract] [Hide abstract]
ABSTRACT: Herein we review nomenclature of the prostate and contiguous structures in each of the 10 official publications from the 1895 [Basel] Nomina Anatomica to the 1998 Terminologia Anatomica. We then compare existing clinical terminology with official terminology endorsed by anatomists over the years with a goal to modernize official terminology. Problematic terms, namely, lobes and lobuli, fascia versus capsule, Denonvilliers' fascia, and transition versus periurethral zone, are addressed. The idea of recognizing prostate arteries, veins, nerves, and neurovascular bundles is introduced. Prostatic and membranous urethras and the closely related external urethral sphincter are covered. We believe urogenital hiatus should also be called anterior levator hiatus. Trapezoid zone should be discarded in future editions of nomenclature. Our recommended changes are supported by a series of pertinent photographs of gross and whole mount histologic specimens and magnetic resonance images. Finally, we provide a new table of terms for the prostate with recommended amendments and deletions to existing official nomenclature as contained in the 1998 Terminologia Anatomica.Clinical Anatomy 11/2009; 23(1):18-29. · 1.16 Impact Factor