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Radiology
Cord Cyst
Built from Obstetric Imaging
What’s inside
7 sections · 48 slides
Overview
- What this covers
What a cord cyst is
A dark pocket inside the cord, and why scanners find so many of them now
- A pocket of fluid inside the umbilical cord
- Why we see more of them today
- Inside a normal umbilical cord
- Delivered placenta with its umbilical cord
- 0.4–3.4%
- Most early cysts simply melt away
- The cyst that will not go away
- What decides how worried to be
Where cord cysts come from
Two very different origins that look identical on the screen
- Two kinds of cord cyst
- True cysts: leftovers from the embryo
- Allantois and yolk sac in the early human embryo
- Cord at the umbilicus showing allantois and omphalomesenteric duct
- What lines a true cyst
- Pseudocysts: jelly that has softened
- True cyst or pseudocyst?
- Ultrasound cannot separate the two
- Why the label does not change your plan
What a cord cyst looks like on ultrasound
Black, round, inside the cord — and silent on colour Doppler
- Cord cyst on greyscale and colour Doppler ultrasound
- Reading that scan
- The features on the screen
- Where in the cord the cyst sits
- Why colour Doppler is the deciding test
- What else looks like this
- Working through the look-alikes
- “
What a persistent cyst can mean
The associations that make a second-trimester cyst worth chasing
- The link with adverse outcomes
- More than one cyst may mean more risk
- What a persistent cyst is found alongside
- When bladder and cyst join up
- The urachus and its common anomalies
- Why the hourglass changes the delivery plan
What to do about it
No treatment exists — so the whole job is looking properly
- There is nothing to treat
- Where a cord cyst leads
- Step one: look everywhere else
- Step two: scan again later
- Step three: offer genetic testing
- How amniotic fluid is sampled under ultrasound guidance
- After the baby is born
- How these pregnancies usually turn out
Pulling it together
What the referring clinician needs, in plain terms
- What the referring physician needs to know
- The three key points
- Five things to carry away
- References
- References (continued)
- References (continued)
- Suggested readings
- Obstetric Imaging: Fetal Diagnosis and Care, 2nd Edition