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Mullerian ducts and fibroids
Terms in this set (56)
What is a mullerian duct?
it is a duct or tube that is present in the human embryo
The fused caudal ends of the two mullerian ducts from what?
the uterus, cervix, and upper two thirds of the vagina
The unfused cranial ends form the paired?
The median septum formed by the medial walls of the mullerian ducts then resorbs, leaving what?
a single uterine cavity
While the female embryo is in the developmental stages, there are how many separate structures that will develop to assist one another?
two; the Mullerian duct itself and the urogenital sinus
Normal mullerian duct formation depends on what?
The completion of three phases; organogenesis, fusion, and septal resorption
What is organogenesis?
it is characterized by the formation of both Mullerian ducts
What is mullerian duct fusion?
the process during which the lower segments of the paired mullerian ducts fuse to form the uterus, cervix, and upper vagina
The urogenital sinus eventually evolves into what?
the bladder as well as other reproductive organs
arrested development can be either?
unilateral or bilateral
bilateral arrested development is?
very rare and results in the absence of the uterus (uterine asplasia)
Unilateral arrested development is?
results in uterus unicornis unicollis
one normally developed mullerian duct while the contralateral duct is either hypo plastic or absent
did not form
complete bilateral agenesis is another name for
complete type 1
complete type 1 is?
rare and incompatible with life b/c of associated bilateral renal genesis.
What does not form in complete type 1?
the urogenital sinus does not form nor do the mullerian ducts, so no kidneys or uterus
incomplete bilateral agenesis is another name for?
incomplete type 1 (Mayer-Rokitansey-Kuster-Hauser syndrome)
incomplete type 1 is?
when the women with this anomaly are infertile b/c of the absence of functional uterus
What does not form in incomplete type 1?
no mullerian ducts are formed so no uterus, BUT the urogenital sinus is formed so kidneys do form.
Unilateral complete agenesis is another name for?
type II d or true unicornuate uterus
Type II d is when?
only one mullerian duct is formed.
Incomplete unilateral agenesia is also called?
what happens in incomplete unilateral agenesia?
one mullerian duct forms, but there is only partial, or incomplete, formation of the other duct
Uterine malformations may be caused by?
-arrested development of the mullerian ducts
-failure of fusion of the mullerian ducts
-failure of reabsorption of the median septum
failure of mullerian duct fusion results in anomalies such as?
bicornuate or didelphys uterus
Complete failure of fusion results in?
uterus didelphys. (The uterus did not fuse at all)
Uterus didelphys means?
two cervices and two horns.
partial failure of fusion results in either?
uterus bicornis bicollis or a uterus bicornis unicollis
Uterus bicornis unicollis?
one cervix and two uterine horns. central myometrium extends to external os
Uterus bicornis bicollis?
two cervices and two uterine horns. central myometrium extends to internal os
failure of resorption is the cause of?
septate or subseptate uterus depending on whether the failure is complete in a septate or subseptate uterus
a septate uterus results from
failure of resorption of the septum b/t the 2 uterine horns.
in a septate uterus the septum can be?
partial or complete in which it extends to the internal os
a complete septate uterus the septum extends from?
the uterine funds to the external os.
in a partial septate uterus the septum is located where?
above the cervix.
an arcuate uterus is?
often considered a normal variant in the uterus.
an arcuate uterus has?
a single uterine cavity with a convex or flat uterine fundus. it has mild thickening of the fundal myometrium.
Diethylstilbestrol (DES)-exposed uterus results in what shape?
a T-shaped uterine cavity
When a mass is found on sonography, it should be characterized by:
-location (uterine or extrauterine)
-external contour (well defined, poorly defined, or irregular borders)
-interal consistency (cystic, complex cystic, solid)
uterine masses are mainly?
ovarian masses are mainly?
is the mass can be shown to arise from the uterus, it's usually a?
myopia, leiomyoma, leiomyomata, and fibromyoma can also be referred to as?
the two mose common symptoms of fibroids are?
abnormal uterine bleeding and pelvic pressure
there are three fibroid types:
Subserosal fibroids are?
located just under the uterine serosa and may be pedunculated or sessile
intramural fibroids are?
found predominantly within the thick myometrium and are sessile
Submucosal fibroids are?
located just under the uterine mucosa (endometrium) and may be either be pedunculated or sessile
attached to the corpus by a narrow stalk
fixed in one place (broad-based)
Which fibroid type is the most common?
Which type of fibroid is the least common?
Subserosal fibroids typically develop where?
on the outer uterine wall and can continue to grow outward increasing in size.
Intramural fibroids typically develop?
within the uterine wall and expand from there.
Submucosal fibroids are typically develop?
just under the lining of the endometrium/uterine cavity.
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