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The prostatic utricle (Latin for "pouch of the prostate") is a small indentation located in the prostatic urethra, at the apex of the urethral crest, on the seminal colliculus (verumontanum), laterally flanked by openings of the ejaculatory ducts. It is also known as the vagina masculina or (in older literature) vesicula prostatica.^[1]

It is often described as "blind", meaning that it is a duct that does not lead to any other structures.^{[citation needed]}

It can sometimes be enlarged.^[2]^[3]

Dissection of prostate showing prostatic utricle opening into the prostatic urethra.

Embryology[edit]

The prostatic utricle might serve no function. However, Robert William Taylor states: "In coitus it so contracts that it draws upon the openings of the ejaculatory ducts, and thus renders them so patulous that the semen readily passes through."^[4]

It is important primarily because it is the male homologue of the female uterus and vagina, usually described as derived from the Müllerian ducts,^[5] although this is occasionally disputed.^[6] The paramesonephric (Mullerian) duct obliterates in the male, forming the prostatic utricle, whereas in the female it becomes the fallopian tube and uterus.^{[citation needed]}

References[edit]

^ Henry Thompson (1883). "vesicula+prostatica"+utricle The diseases of the prostate. J&A Churchill.
^ Meisheri IV, Motiwale SS, Sawant VV (2000). "Surgical management of enlarged prostatic utricle". Pediatr. Surg. Int. 16 (3): 199–203. doi:10.1007/s003830050722. PMID 10786981.
^ Lopatina OA, Berry TT, Spottswood SE (2004). "Giant prostatic utricle (utriculus masculinis): diagnostic imaging and surgical implications". Pediatr Radiol 34 (2): 156–9. doi:10.1007/s00247-003-1048-9. PMID 12961046.
^ R. W. Taylor. "A practical treatise on sexual disorders of the male and female". New York and Philadelphia, 1897; 3rd edition, 1905. P. 48
^ Kawashima, A.; Sandler, C. M.; Wasserman, N. F.; LeRoy, A. J.; King, B. F.; Goldman, S. M. (1 October 2004). "Imaging of Urethral Disease: A Pictorial Review". Radiographics 24 (suppl_1): S195–S216. doi:10.1148/rg.24si045504. Cite uses deprecated parameters (help); |accessdate= requires |url= (help)
^ Shapiro E, Huang H, McFadden DE, et al. (2004). "The prostatic utricle is not a Müllerian duct remnant: immunohistochemical evidence for a distinct urogenital sinus origin". J. Urol. 172 (4 Pt 2): 1753–6; discussion 1756. doi:10.1097/01.ju.0000140267.46772.7d. PMID 15371806.

External links[edit]

Prostatic+utricle at eMedicine Dictionary
SUNY Labs 44:05-0204—"The Male Pelvis: The Prostate Gland"
pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University) (malebladder)
Human anatomy at Dartmouth figures/chapter_34/34-3.HTM

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English Journal

Japanese Journal

Morphological and immunohistochemical investigations on the utriculus prostaticus from fetal period up to adulthood

WERNERT N.
Prostate 17, 19-30, 1990
NAID 30025839993

「前立腺小室」

Prostatic utricle
	Vesiculae seminales and ampullæ of ductus deferentes, seen from the front.
	The male urethra laid open on its anterior (upper) surface.
Latin	Utriculus prostaticus,; utriculus masculinus,; vagina masculina,; sinus pocularis
Gray's	subject #256 1234
Precursor	Müllerian duct