mesonephric duct


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Related to mesonephric duct: urogenital sinus, Mesonephric tubule, mullerian duct

mesonephric duct

[¦me·zō¦nef·rik ′dəkt]
(embryology)
The efferent duct of the mesonephros. Also known as Wolffian duct.
References in periodicals archive ?
In the evaluation of patients with suspected mesonephric duct development failure, US can be very useful for the diagnosis, detecting an anechoic cystic mass in the pelvic fossa, but it can be more limited to study the rest of the pelvic smaller anatomic structures and their relationships.
Determining the deep margin of normal glands may be difficult, because on occasion benign endocervical glands, nabothian cysts, and mesonephric duct remnants may be found deep in the stroma and extend to the outer third of the cervical wall.
We agree that the absence of the "inducting" function of the injured mesonephric duct on the Mullerian duct had been established as the origin of such anomalies.
A unique radiological pentad of mesonephric duct abnormalities in a young man presenting with testicular swelling.
Seminal vesicle cysts with unilateral renal agenesis and contralateral ureteral stenosis in a [beta]-thalassemic patient: an unknown association by incomplete development of the mesonephric duct. Urol Int 2007;79:367-70.
Mesonephric duct occupied between testis and mesonephros and shifted to primary bladder.
On each side of the embryo, a smaller paramesonephric (Mullerian) duct appears between the mesonephros and mesonephric duct. At this point these ducts have blind, growing points directed toward the urogenital sinus.
Ectopic ureters are always associated with a duplicated system--two ureteral buds exit from the mesonephric duct, and one ends up positioned ectopically.
The problem occurs when the ureteric bud fails to make contact with the metanephros or if two ureteric buds arise from the mesonephric duct.
The ureteric bud develops from the mesonephric duct during the 5th week of gestation and the elongated stalk of the ureteric bud that is called the metanephric duct later forms the ureter.
In animal studies, homozygous PAX2-null mutant mice had no kidneys because the ureteric bud failed to branch from the mesonephric duct, (23) and heterozygous PAX2 mutant mice caused renal hypoplasia.
The embryologic genesis of multiple pelvises is best described by one ureteral bud arising at the 5th week of embryological life from the mesonephric duct. This structure then divides to two or three before reaching the metanephrogenic blastema.[3-5] In such cases, it may be difficult to decide whether the left kidney represents a trifid pelvis, purely a peduncular arrangement or elongation of the major calyces in association with a rudimentary pelvis.