Teaching File Series
Ultrasound Division


ULTRA SONOGRAPHY FILE

Two Vessels in the Umbilical Cord

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Click on the following Image for a closer, enlarged look . . .

20y Female with over distended uterus for her period of amenorrhoea.
31 to 32 weeks gestational age on ultrasonography.

FINDINGS :

Umbilical cord shows only one artery instead of two arteries along with polyhyhroamniosis.
Stomach is not seen inspite of periodical scanning. 
( esophageal atresia.).Not showen in the figure.

DISCUSSION:

About  0.2-2 % of  time umbilical cord shows only two vessels, with missing of one  artery. 
There is
increased  incidence ( 14-62 %) of fetal abnormalities when there are only two vessels.Inthe absence of associate abnormalities, an isolated  single umbilical artery does not  increase the risk of chromosome aberrations. with this abnormality areat incresed risk congenital abnormalites,chromosomal abnormalities, IUGR,  prematurity and perinatal mortality.

Reference :

Differential diagnosis in obstetric and gynecologic ultrasound
by R A L BISSET, A.N.KHAN AND N.B.THOMAS, 
Clinical sonography by ROGER SANDERS.

Submitted by : Dr. Adinarayana Rao &  Dr.Swarna Latha



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