iCliniq Logo
HomeHealth articlesPediatricscystic adenomatoid malformation of lung in children
Newborn and Baby

Cystic Adenomatoid Malformation of Lung In Children

Verified data
0

5 min read

Share

Outline

Congenital cystic adenomatoid malformation (CCAM) is a benign lung condition that appears before birth as a mass or cyst in the chest.

Written byDr. Thirumala Spoorthy. J

Medically reviewed byDr. Veerabhadrudu Kuncham

Published At November 1, 2022
Reviewed AtAugust 14, 2024

What Is Cystic Adenomatoid Malformation of the Lung?

Cystic adenomatoid malformation of the lung seen in the mother's womb is a mass or growth of the lung tissue that may not function well but can grow in size. It is also known as congenital pulmonary airway malformation (CPAM). It is a rare congenital malformation. The mortality rate is much higher; around 30 % of children present with cystic adenomatoid malformation in the lung. However, these figures may not match the children who do not show any symptoms.

What Are the Causes of Cystic Adenomatoid Malformation of the Lung?

Congenital cystic adenomatoid malformation of the lungs is caused by the abnormal growth of lung tissue, which continues to grow and does not function properly. These cystic adenomatoids are benign and not genetically inherited, so they do not pass on to the upcoming generations. It is the abnormal growth of lung tissues.

When Does Cystic Adenomatoid Malformation of Lung Development Occur?

Cystic adenomatoid lung malformation develops at 18 to 26 weeks of gestation. However, there will be rapid growth during the 20th and 25th weeks of pregnancy. Any genetic defects do not cause it.

What Are the Signs and Symptoms of Cystic Adenomatoid Malformation?

The signs and symptoms of cystic adenomatoid malformation are diagnosed during the 18 to 26 weeks of pregnancy with the help of a regular ultrasound that is performed during the pregnancy.

  • The very first sign of congenital cystic adenomatoid is a pregnant mother who measures bigger than the usual size for a due date because of too much amniotic fluid. This is due to the congenital cystic adenoma pushing the heart and esophagus of the fetus, which prevents the fetus from swallowing amniotic fluid.

  • A large cystic adenomatoid causes a condition called hydrops, in which there will be a severe accumulation of fluid in the skin, chest, and abdomen, which causes severe heart failure. As the cystic adenomatoid presses the heart, it reduces the blood supply to the heart and results in heart failure.

  • About 10 percent of all fetuses with cystic adenomatoid develop hydrops. Hydrops is the condition where there is excessive amniotic fluid in the mother's womb.

  • Untreated fetuses with hydrops or congenital cystic adenomatoid will not survive.

  • The mass or the abnormal tissue growth in congenital cystic adenomatoid will grow large and limit the growth of the lungs, causing pulmonary hypoplasia, which is called small lungs.

  • The mass or tissue growth pushes the heart and esophagus of the fetus, which prevents swallowing amniotic fluid, resulting in polyhydramnios or too much amniotic fluid.

How to Diagnose Cystic Adenomatoid Malformation?

  • The cystic adenomatoid malformation is generally diagnosed by a routine ultrasound done during pregnancy, in which an ultrasound shows a bright mass in the chest region.

  • The size of the mass changes gradually throughout the pregnancy.

  • The ultrasound also shows the deviated position of the heart.

Can a Child With Cystic Adenomatoid Malformation of the Lung Survive?

If the tissue is small, the mass will shrink on its own. In most cases, the infant will survive. In very rare cases, there will be fetal death. Usually, the cyst will be harmless. However, proper diagnosis and early intervention will cause further damage to the infant.

How Can the Severity of CCAM/CPAM Be Determined Before Delivery?

A special measurement named CCAM volume ratio or CVR helps measure the size of the lung lesion in relation to the size of the baby (based on the head circumference). CVR is considered to be an accurate way of measuring the growth of CCAM/CPAM over time. It also helps to know about the best treatment for the baby.

If the CVR is more than 1.6, the baby is considered to be at higher risk for developing heart failure. In such cases, prenatal intervention may be required. If the CVR is low, it is good. However, continuous monitoring is recommended to ensure there is no increase in the volume of the lesion and that it needs treatment before birth.

Fetal Intervention for CCAM or CPAM:

When large lesions of CCAM or CPAM are present, the treatment options vary. They depend on the type of CCAM/CPAM (microcytic or macrocytic) and the gestational age of the fetus.

The Treatment Options Include:

Steroids to Prevent the Growth of Lesions: Solid microcytic lesions can be controlled by the use of steroids. Steroids can stop or slow down the growth of lesions, which can help prevent the need for surgery in some cases.

Draining Fluid From the Cyst: Macrocytic lesions can be drained prenatally to reduce the size of themass. In case of reaccumulation, a shunt can be placed. The shunt aims to divert fluid from the cyst to the amniotic sac, which can be kept until delivery.

Open Fetal Surgery to Remove CCAM/CPAM: Open fetal surgery to remove fluid is done very rarely, as prenatal management can take care of many things. If the prenatal treatment does not work, then surgery can be done.

Exit Procedure: This procedure is done when the lesion keeps growing but hydrops do not develop. This procedure is a special technique called ex-utero intrapartum treatment (EXIT).

C-Section to Resection: This can be used when the lesions are large. Babies are easily removed by the C-section and then taken care of by fetal surgeons to remove the mass.

What Is the Treatment for Cystic Adenomatoid Malformation of the Lung?

  • Most babies with cystic adenomatoid malformation of the lung are treated soon after birth.

  • In very few cases, the treatment is done before the delivery through fetal intervention.

  • Most infants with cystic adenomatoid will not have any symptoms. Still, in a few cases, infants may develop difficulty breathing and require oxygen, so a breathing machine called a ventilator is put on.

  • Infants without any symptoms can be discharged after a few days of observation.

  • A CT scan is recommended after three months of age just to confirm if there is any mass or tissue growth left shrunk in the infant's lungs.

  • The mass or the tissue growth should be removed surgically by the pediatric surgeon and a radiologist.

  • Even though the child does not exhibit any symptoms, the tissue mass has to be surgically removed to prevent the mass from causing breathing problems in the future or transforming into a cancerous tumor.

  • Fetal intervention is done only when there is heart failure in the fetus, and the surgery is performed on the mother; it is just like a C- section procedure where the surgeon removes the mass from the fetus.

How Is the Surgery Performed?

  • The surgery is performed under anesthesia.

  • The surgery is performed using many tiny telescopic instruments.

  • Multiple small incisions are made than giving a large chest incision to avoid scars.

  • Very tiny scissors are used.

  • The child is discharged immediately after three to four days. When the child is breathing comfortably, can drink formula or breast milk, and is comfortable on pain medications, the child will be discharged.

  • The child should not be discharged if any of the following symptoms persist, and the utmost care must also be taken after discharge from the hospital.

Conclusion:

The congenital cystic adenomatoid malformation is a rare benign lung lesion that occurs in the fetus due to the abnormal tissue growth in the lung, causing difficulty in breathing and hindering lung development and also causing increased amniotic fluid in the pregnant mother which can be treated immediately after birth or any complications like heart failure arises then fetal intervention has to be performed which is similar to C-section. The procedure is done by a pediatric surgeon using tiny instruments with tiny incisions which cause minor scars. This mass will shrink on its own, but if it does not shrink, then only surgical intervention is required. Once the surgery is done and the child can breathe comfortably, the patient will be discharged by prescribing a few medications like painkillers.

Listen to related tracks in our music library

Frequently Asked Questions

Most newborns with CCAMs are symptomless at birth, but on rare occasions, an infant may have breathing problems and need oxygen, which a ventilator machine can provide. Depending on the severity of the CCAM, most kids are operated on shortly after birth or many months later. Fetal intervention may treat a select few severe conditions before delivery. Instead of making a single major chest incision, the procedure is typically performed on newborns using tiny telescopic equipment through extremely small incisions.
A benign or non-cancerous mass of abnormal lung tissue known as a congenital cystic adenomatoid malformation (CCAM) is often found on one lung lobe. It has an equal frequency with both lungs. 
CCAMs are distinguished into two types.
Type 1:The presence of one or more large cysts with a closed sac that contains air, fluids, or semi-solid material.
Type 2: Presence of cystic and solid abnormalities.
Babies with CPAM should be born at a hospital with a NICU since they are more likely to experience difficulties during and after birth (neonatal intensive care unit). The size and severity of the lesion will determine the course of treatment for newborns with CPAM after delivery. In severe cases, surgery is required to remove the CPAM and prevent breathing issues as soon as possible after delivery.
Although, EXIT operation (operates on a damaged lung and removes the CPAM while the baby is still connected to the mother's placenta, which supplies your fetus with nutrition and oxygen. The CPAM is taken out once the baby is fully born. Performed eventually at the time of delivery) can be performed to remove the CPAM at birth.
The condition known as congenital cystic adenomatoid malformation, or CPAM, has unknown origins. Since CPAM is not inherited, families often do not experience recurrence. The deformity is caused by lung tissue that develops abnormally, often in one lung lobe. The illness affects about 1 in 25,000 pregnancies, making it quite uncommon. Male children are significantly more likely to develop it than females. 
Before birth, CPAM may develop so rapidly that it poses a life-threatening situation. Typically, this occurs between weeks 18 and 26 of pregnancy. The condition compresses the heart and lungs and results in organ failure. Neonatal surgery is required to prevent this condition.
A variety of diagnostic aids diagnose cystic adenomatoid malformation.
- Prenatal Ultrasound: It is often used to identify such conditions, using advanced prenatal imaging techniques to assess fetal anatomy and lung lesions. 
- Fetal Echocardiogram: A pediatric cardiologist will perform prenatal echocardiography to assess heart anatomy and function.
- Fetal MRI: To assess anatomical information regarding lung damage.
Most infants with congenital pulmonary airway malformations do not experience life-threatening symptoms. Sometimes during pregnancy, in the third trimester, the lesions shrink or are no longer visible. Sometimes these lesions are present, but the lungs still grow properly.
The average operating time of CPAM was two and a half hours, ranging from one and a half hours to four hours. However, the average time to remove the chest drains ranges from one to five days. The patients were discharged within four to seven days.
Congenital pulmonary airway malformation is typically rare, and the illness is seen in 1 in 25,000 pregnancies, making it quite uncommon. Male children are significantly more likely to develop it than females.
Initially, one to two weeks of gestational ultrasound are recommended to assess the size of the CPAM. After around 26 to 28 weeks (6.5 to 7 months) of gestation, most CPAMs stop developing. At this stage, ultrasound is recommended every three to four weeks. A fetal MRI may be required if the CPAM enlarges in size.
It has no genetic or chromosomal origin; hence, it is not hereditary. The deformity is caused by lung tissue that develops abnormally in one lung lobe; it rarely occurs in families.
Fetal lung lesions, also known as fetal lung masses, are lung malformations that appear before a baby is born. Most masses are solitary, while some may be connected to other congenital defects or hereditary conditions. 
Source Article IclonSourcesSource Article Arrow
Dr. Veerabhadrudu Kuncham from iCliniq
Dr. Veerabhadrudu Kuncham

Pediatrics

Consult this doctor

Rate this article

Tags:

cystic adenomatoid malformation of lung in children

Ask your health query to a doctor online

Pediatrics

*guaranteed answer within 4 hours

Trustpilot

Disclaimer: No content published on this website is intended to be a substitute for professional medical diagnosis, advice or treatment by a trained physician. Seek advice from your physician or other qualified healthcare providers with questions you may have regarding your symptoms and medical condition for a complete medical diagnosis. Do not delay or disregard seeking professional medical advice because of something you have read on this website. Read our Editorial Process to know how we create content for health articles and queries.