Fetal Lung Lesions / CPAM in Pregnancy
A suspected fetal lung lesion such as CPAM needs careful fetal medicine review — not just a label. At Mayflower, the scan evaluates the lesion type, size, heart shift, hydrops risk, CVR trend, associated anomalies and delivery planning.
Specialist counselling after a fetal lung lesion finding
When a scan report says “CPAM”, “CCAM”, “echogenic lung lesion”, “fetal chest mass” or “bronchopulmonary sequestration”, parents often become anxious. The next step is a structured fetal medicine assessment to understand what the lesion is doing to the baby’s chest and whether the pregnancy needs special monitoring.
Dr. Kunda Shahane reviews the fetal chest, heart position, lesion size, blood supply, amniotic fluid, fetal growth and signs of hydrops, then explains the plan in simple language.
What are fetal lung lesions?
Fetal lung lesions are abnormalities seen in the baby’s chest during pregnancy. Some are cystic, some appear solid, and some have an abnormal blood supply.
CPAM / CCAM
CPAM is a developmental lung lesion. It may appear as a large cyst, many small cysts, or a bright solid-looking area in the fetal lung.
Bronchopulmonary sequestration
This lesion often has a separate feeding vessel, usually from the aorta. Doppler assessment is important for diagnosis.
Hybrid or other chest lesions
Some lesions have mixed features. The scan must check the whole chest, heart, diaphragm and abdomen before counselling.
Important reassurance
Not every fetal lung lesion is severe. Many remain stable, some reduce in size later in pregnancy, and many babies do well with planned postnatal care. The important step is to identify the smaller group that needs closer monitoring, fetal therapy discussion or delivery in a tertiary centre.
What Dr. Kunda evaluates in CPAM and fetal lung lesions
The purpose of the scan is to classify the lesion, assess risk, and plan follow-up.
| Assessment area | What is checked | Why it matters |
|---|---|---|
| Lesion type | Macrocystic Microcystic Solid-looking | Different patterns behave differently and may need different follow-up intensity. |
| Lesion side and location | Right lung, left lung, upper/middle/lower chest position and relation to diaphragm. | Location helps distinguish CPAM from other fetal chest and diaphragm conditions. |
| CPAM Volume Ratio / CVR | Lesion length × width × height × 0.52 divided by fetal head circumference, when measurable. | CVR helps monitor growth of the lesion and estimate risk of hydrops or compression. |
| Heart shift / mediastinal shift | Whether the lung lesion is pushing the fetal heart to the opposite side. | Significant shift suggests mass effect and requires closer surveillance. |
| Hydrops check | Skin edema Ascites Pleural/pericardial fluid | Hydrops is a serious sign and changes urgency of counselling and management. |
| Feeding vessel | Colour Doppler search for a systemic arterial supply. | A feeding vessel suggests bronchopulmonary sequestration or a hybrid lesion. |
| Amniotic fluid | Liquor volume and signs of polyhydramnios. | Large chest lesions can sometimes affect swallowing and amniotic fluid balance. |
| Fetal echocardiography | Heart structure, rhythm and outflow tracts. | The heart may be shifted by the lesion; dedicated fetal echo confirms whether the heart anatomy is otherwise normal. |
| Other anomalies | Brain, spine, face, diaphragm, abdomen, kidneys, limbs, cord and placenta. | Isolated lesions and lesions with additional findings have different counselling and testing pathways. |
Why serial follow-up is important
Fetal lung lesions can change during pregnancy. Some grow rapidly for a few weeks, some plateau, and some become less visible later. That is why one scan is often not enough.
Serial ultrasound helps track CVR, heart shift, hydrops, amniotic fluid, fetal growth and the need for delivery planning with neonatal specialists.
What happens after CPAM is suspected?
The next steps depend on lesion type, size, fetal wellbeing and whether any warning signs are present.
Confirm the finding with detailed fetal chest scan
The fetal lungs, heart, diaphragm, stomach, liver and thoracic structures are reviewed carefully to confirm the diagnosis and exclude look-alike conditions.
Classify the lesion pattern
The scan describes whether the lesion is macrocystic, microcystic, solid-looking, vascular or mixed, and whether a feeding vessel is present.
Measure CVR and screen for hydrops
CVR trend, skin edema, ascites, pleural fluid, pericardial fluid and placental thickness are checked during follow-up.
Perform fetal echocardiography
Fetal echo helps confirm cardiac anatomy and assesses whether the heart is only shifted by the lesion or has a structural abnormality.
Plan delivery and neonatal care
If the lesion is significant, delivery is coordinated with an obstetrician, neonatologist and paediatric surgeon so that the baby receives prompt care after birth.
Warning signs that change follow-up intensity
High or rising CVR
A larger or rapidly increasing lesion may need more frequent review and specialist counselling.
Hydrops
Fluid accumulation in fetal compartments is a serious sign and needs urgent specialist assessment.
Marked heart shift
Significant chest compression can affect counselling and may require closer surveillance.
Polyhydramnios
Increased amniotic fluid can occur in some large chest lesions and may affect pregnancy management.
Possible treatments in selected cases
Many fetal lung lesions are observed. In selected high-risk cases, options such as maternal steroids, cyst drainage, shunt placement or referral to a fetal therapy centre may be discussed. These decisions require individualised counselling and are not automatic for every CPAM.
When to book a second opinion scan
After anomaly scan
If the report mentions fetal chest mass, echogenic lung lesion, CPAM, CCAM, sequestration or heart shift.
For CVR monitoring
If a fetal lung lesion has been diagnosed and your obstetrician has advised serial fetal medicine follow-up.
Before delivery planning
If the baby may need neonatal intensive care or paediatric surgical evaluation after birth.
What to bring
Bring previous ultrasound reports, anomaly scan images if available, fetal echo report if already done, screening/NIPT reports, obstetric notes and any referral letter. These help compare lesion size and understand the full pregnancy context.
Dr. Kunda Shahane’s note on CPAM counselling
“A fetal lung lesion should not be explained only as a scary word in a scan report. Parents need to know the type of lesion, whether it is growing, whether the heart is shifted, whether hydrops is present, and where the baby should be delivered. A structured follow-up plan brings clarity to a very anxious situation.”
Fetal lung lesion and CPAM FAQs
Is CPAM the same as CCAM?
CPAM is the newer term. CCAM was the older name. Many old reports or doctors may still use CCAM, but both usually refer to the same group of congenital lung lesions.
Can CPAM disappear during pregnancy?
Some lesions become smaller or less visible later in pregnancy. This does not always mean the lung is completely normal, so postnatal evaluation may still be advised.
What is CVR and why is it repeated?
CVR is CPAM volume ratio. It helps track lesion size in relation to fetal head circumference. A rising CVR may suggest increasing compression and closer monitoring.
Does every CPAM baby need surgery after birth?
Not always. Some babies need surgery, some need imaging and observation, and some need urgent neonatal care. The postnatal plan depends on symptoms, lesion size, imaging findings and paediatric surgical opinion.
Why is fetal echo needed for a lung lesion?
A large chest lesion can shift the heart. Fetal echocardiography checks whether the heart structure is otherwise normal and helps delivery and neonatal planning.
Can fetal lung lesions cause hydrops?
Yes, some large or rapidly growing lesions can cause fetal hydrops. This is why follow-up looks for fluid around the baby, skin swelling, placental thickening and other warning signs.
Will I need delivery in a special centre?
If the lesion is significant, delivery is usually planned where neonatal intensive care and paediatric surgery support are available. The decision is individualised after fetal medicine review.
Is fetal MRI required?
Fetal MRI is not always required. It may be suggested in selected cases when additional information about lung volume, lesion anatomy or delivery planning is needed.
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Need a CPAM or fetal lung lesion scan in Nagpur?
Book a detailed fetal medicine scan and counselling appointment with Dr. Kunda Shahane at Mayflower Fetal Medicine & High-Risk Pregnancy Centre, Dhantoli, Nagpur. Bring previous scan reports and images for comparison.
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