Diagnosis hub

Diagnosis and causes

Two questions sit under everything else in the first week: is this really clubfoot (CTEV), and why did it happen. Pick the one you are actually asking.

Written by Heath, who has lived it: casts from birth, a fusion at sixteen, the US Army, and distance running.

Is this really clubfoot?

Start here What is clubfoot? → The definition, the four components, what you can see, and how severity gets scored. The distinction Or is it positional? → A positional foot looks turned but moves freely. Flexibility is what separates them. Before birth On ultrasound → What the sonographer saw, and why a prenatal finding is an indication rather than a verdict. False alarms Can the scan be wrong? → It can miss it, and it can call it when the foot turns out fine.

Why did it happen?

The honest answer What causes clubfoot? → Multifactorial, and in most cases never pinned down. Also: what did not cause it. Inheritance Is it genetic? → Heritable, but not single-gene. Those are different claims. Next pregnancy Family risk → The odds for a sibling, and for your own children later. When it comes with more Syndromic clubfoot → Clubfoot alongside another condition is assessed differently.

How the diagnosis is actually made

By hand. A clinician holds the foot and tries to move it toward a corrected position, and what happens next decides everything. A foot that moves freely is positional, a foot that resists is clubfoot. No scan and no blood test replaces that moment.

This is why a prenatal finding cannot be a confirmation. Ultrasound sees shape; the diagnosis depends on stiffness, which cannot be seen before birth. Some feet flagged at the anomaly scan are entirely normal at delivery, and occasionally a scan misses one.

18 to 22 weeksWhen it is usually first raised, at the anomaly scan.

At birthWhen it is confirmed, by physical examination.

First weeksWhen treatment usually starts, while tissue is most responsive.

Where you are

Which of these is you, this week?

Pick the one that fits. Each points to what is known at that stage and the question worth taking to the team.

It was raised at the 20-week scan

The anomaly scan, usually at 18 to 22 weeks, is when clubfoot is most often first raised. A scan sees shape. The diagnosis depends on stiffness, which cannot be seen before birth.

Worth knowingSome feet flagged on a scan are entirely normal at delivery, and occasionally a scan misses one.

Worth askingWho confirms it after birth, and how soon they can see the baby.

Born, and told it is clubfoot

Confirmation is by hand: a clinician tries to move the foot toward a corrected position. A foot that resists is clubfoot.

What comes nextReferral to pediatric orthopedics. Treatment usually starts in the first weeks, while tissue is most responsive.

Read nextThe first orthopedic visit.

Worth askingWhether the clubfoot looks isolated, or whether anything else was found.

Told it might be positional

A positional foot looks turned but moves freely. Flexibility is what separates it from clubfoot, and it is judged by examining the foot.

Read nextPositional or clubfoot.

Worth askingWhat the clinician felt when they moved the foot, and whether they want to see it again.

Wondering why it happened

In most cases the cause is multifactorial and never pinned down. It is heritable, but not caused by a single gene.

Read nextWhat causes it, and what did not.

For the familyThe odds for a sibling.

If there is more going onSyndromic clubfoot is assessed differently.

Getting the diagnosis

At what age is clubfoot diagnosed?

At birth, on sight, usually in the delivery room. A good number of families learn earlier than that from a prenatal ultrasound, and a prenatal finding is an indication rather than a verdict: the scan can miss it, and it can call it on a foot that turns out fine. Neither route counts as a late diagnosis. Clubfoot is visible from the moment a baby is born, and treatment usually begins within the first weeks.

When is clubfoot diagnosed?

Often suspected at the 18 to 22 week anomaly scan, and confirmed after birth by physical examination. A prenatal finding is a strong indication, not a confirmation, because the diagnosis depends on how the foot moves in the hand.

Who actually makes the diagnosis?

A sonographer or obstetrician may raise it prenatally, and a pediatrician usually identifies it at birth. The diagnosis that shapes treatment comes from a pediatric orthopedic specialist.

How quickly do we need to be seen?

Within the first weeks of life. Treatment begins early while newborn tissue is most responsive, so an early referral to a Ponseti-trained provider matters more than an urgent one.

Do I need any tests to confirm clubfoot?

Usually not. Clubfoot is a clinical diagnosis made by examination. X-rays are not routine in newborns, and genetic testing is only relevant where clubfoot appears alongside other findings.

Who diagnoses clubfoot?

A sonographer or obstetrician may raise it prenatally, and a pediatrician or neonatologist usually identifies it at birth. The diagnosis that shapes treatment comes from a pediatric orthopedic specialist.

Sources

Where this comes from

1 Clubfoot overviewAAOS OrthoInfo 2 Clubfoot study guidePOSNA 3 Family risk and genetics literature searchPubMed 4 Prenatal clubfoot literature searchPubMed

Once the diagnosis is settled

What happens next

Early treatment →The six stages, from first visit to bracing. First ortho visit →What that appointment covers, and what to bring. Find a provider →How to check someone is genuinely Ponseti-trained. Found on the 20-week scan →What a prenatal diagnosis does and does not tell you. The whole timeline →Birth to adulthood, and where each stage sits.