In smaller male-phase individuals, the oviducts are not visible, but the vasa deferentia, which terminate in distal ejaculatory ducts
that open at the male gonopores, are well developed (Fig.
Male: gonocoxite without basal setae tuft; gonostylus with one apical and one preapical spiniform strong setae and one thin setae at middle; paramere complex, with a short capitate superior branch which has point-curved setae along its margin and other group of setae at base of the apical region; ejaculatory ducts
with no strong modified apices; lateral lobe thin.
Vasography is not required and should be discouraged for men with an ejaculatory duct
obstruction (Level of Evidence 3, Grade C Recommendation).
3), (4) Symptomatic SVCs usually occur in the second to fourth decades of life, as the result of accumulated seminal fluid in the seminal vesicle caused by a blocked ejaculatory duct
3) Both may be secondary to testicular failure or obstruction inside the testis, epididymis, vas deferens or ejaculatory duct
7) The seminal vesicle and ejaculatory duct
have also been identified as potential mimickers of carcinoma when the foci of interest are small, such as on a core needle biopsy.
Furthermore, differential firing of left and right ejaculatory ducts
may contribute to how males strategically change the number of sperm in their ejaculates, a phenomenon that is widespread, but for which the mechanism remains unknown," they say.
rubripes males consists of paired testes, vas deferens and ejaculatory ducts
and is similar to the reproductive system generally described for other brachyurans (Krol et al.
Eisendrath and Ralnick describe the ejaculatory duct
at the outlet of the seminal vesicles as "a tortuous inelastic duct," refer to the "winding course" of the vas deferens as "quite tortuous," and discuss the "tortuosity" of its various compartments and foldings (56-57).
The anatomical relationship of the prostatic utricle with adjacent structures, including bladder, rectal, ejaculatory duct
and neurovascular structures, is relatively complicated, which may lead to a difficult treatment.
Transrectal ultrasonography in disorders of the seminal vesicles and ejaculatory ducts
There was not a site-specific preponderance for the urethra, ejaculatory ducts
, prostatic ducts, or utricle.