Articles
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44 results found
Article
Renal agenesis
Renal agenesis refers to a congenital absence of one or both kidneys. If bilateral (traditionally known as the classic Potter syndrome) the condition is fatal, whereas if unilateral, patients can have a normal life expectancy.
Epidemiology
Unilateral renal agenesis affects approximately 1 in ...
Article
Labeled imaging anatomy cases
This article lists a series of labeled imaging anatomy cases by body region and modality.
Brain
CT head: non-contrast axial
CT head: non-contrast coronal
CT head: non-contrast sagittal
CT head: non-contrast axial with clinical questions
CT head: angiogram axial
CT head: angiogram coronal
...
Article
Uterus
The uterus is an extraperitoneal hollow, thick-walled, muscular organ of the female reproductive tract that lies in the lesser pelvis.
Gross anatomy
The uterus has an inverted pear shape. It measures about 7.5 cm in length, 5 cm wide at its upper part, and nearly 2.5 cm in thickness in adults....
Article
Fallopian tube
The fallopian tube (TA: tuba uterina 8), also known as the uterine tube or, less commonly, the oviduct, is a paired hollow tube that bridges the ovary and uterus and functions to convey the mature ovum from the former to the latter. If conception occurs, it usually does so within the tube, which...
Article
Placenta
The placenta is a fetal organ of pregnancy, responsible for providing nutrition and oxygen to the fetus as well as excretory functions.
Embryology
Placenta is formed from fetal and maternal components 2:
maternal component: decidua placentalis is the inner portion of the placenta, which is f...
Article
Vagina
The vagina is a midline fibromuscular tubular organ positioned in the female perineum extending superiorly from the vulva, to the cervix and uterus in the pelvis.
Gross anatomy
The vagina is 6-8 cm in length, extending posterosuperior from the vestibule through the urogenital diaphragm to the...
Article
Cervix
The cervix or uterine cervix is the lower constricted segment of the uterus providing the passage between the uterus proper and the vagina.
Gross anatomy
The cervix is somewhat conical in shape, with its truncated apex directed posteriorly and inferiorly. The inferior aspect of the cervix pro...
Article
Single umbilical artery
Single umbilical artery is a congenital absence of either the right or left umbilical artery. In the usual situation, there are paired umbilical arteries. For unknown reasons, the absence of the left umbilical artery is much more common (~70%).
Epidemiology
The estimated prevalence is ~0.4-1% ...
Article
Hemivertebra
Hemivertebra is a type of vertebral anomaly that results from a lack of formation of one half of a vertebral body. It is a common cause of congenital scoliosis.
Epidemiology
The estimated incidence is at ~0.3 per 1000 live births 2.
Associations
Recognized associations are many and include:...
Article
Retroplacental complex
Retroplacental complex (RPC) is the region behind the placenta and is composed of decidua basalis and portions of myometrium including the maternal veins which drain the placenta.
Radiographic features
Ultrasound
visualized after 20 weeks of gestation
seen as an hypoechoic, subplacental regi...
Article
Uterine duplication anomalies
Uterine duplication anomalies are a group of Müllerian duct anomalies where fusion of the Müllerian duct associated structures fail to some degree:
uterus didelphys: class III
bicornuate uterus: class IV (second commonest duplication anomaly)
septate uterus: class V (commonest duplication ano...
Article
Uterine artery
The uterine artery is seen bilaterally and is a branch of the anterior division of the internal iliac artery.
Gross anatomy
Course
It runs medially in the pelvis, within the base of the broad ligament, to the outer surface of the uterus. From lateral to medial it has a descending, transverse ...
Article
Fallopian (disambiguation)
The eponym fallopian may refer to:
fallopian canal (facial nerve canal)
fallopian tube (uterine duct)
fallopian ligament (inguinal ligament)
History and etymology
It is named after Gabriele Falloppio (also known by his Latin name Fallopius), Italian anatomist (1523-1562). Despite the eponym...
Article
Umbilical cord
The umbilical cord is a fetal organ that connects the placenta to the developing fetus and is a vital passage for nutrients, oxygen and waste products to and from the fetus.
Gross anatomy
The umbilical cord inserts into the center of the placental bulk and into the fetus at the umbilicus. Vari...
Article
Neurenteric canal of Kovalevsky
The neurenteric canal or canal of Kovalevsky is the transient communication of the amnion through notochordal canal to the yolk sac during notochordal formation at day 16-17.
Abnormalities during this stage produce the neurenteric cyst spectrum.
Article
Congenital utero-vaginal anomalies
There are many classification systems for congenital utero-vaginal anomalies. These include:
Buttram and Gibbons classification 2
American Fertility Society (AFS) classification
Modified Rock and Adam - AFS classification
Modified Rock and Adam - AFS classification
This classification divid...
Article
Chorion
The chorion is one of the embryonic membranous structures that encloses the fetus and the amnion. The chorion begins to form chorionic villi towards its outer surface, which initially serves to provide nutrition to the developing embryo.
Part of the chorionic villi arborize more extensively an...
Article
Ovarian artery
The ovarian artery is a paired structure and is the main gonadal artery in females.
Gross anatomy
Origin
The ovarian artery arises anterolaterally from the aorta just inferior to the renal arteries and superior to the inferior mesenteric artery (between L2 and L3).
Course
Descends caudally ...
Article
Amnion
Amnion refers to a membranous structure which covers and protects the embryo. It forms inside the chorion. The amnion usually fuses with the outer chorion by around 14 weeks of gestation.
Radiographic features
Ultrasound
The amnion can be visualized in most pregnancies before the 12th week of...
Article
Rhombencephalon
The rhombencephalon (plural: rhombencephalons or rhombencephala), or hindbrain is a primary vesicle of the neural tube.
Development
During the fifth week of embryological development, the rhombencephalon further subdivides into the secondary brain vesicles, the metencephalon and the myelenceph...
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