Congenital Cystic Adenomatoid Malformation: A Case Report with Clinical, Radiological, Histological, and Surgical Features

Background: Congenital cystic adenomatoid malformation (CCAM) is a congenital anomaly of lung development, accounting for approximately 25% of congenital lung lesions. Respiratory distress often occurs during the neonatal period, and in 80% to 85% of cases, the diagnosis is made before the age of 2 years following respiratory infections. Case Report: We report a case of MAKC diagnosed in the neonatal period. The diagnosis was based on clinical, radiological and histological elements. Our patient underwent surgical resection. Histological examination confirmed the diagnosis of MAKC without any sign of malignancy. The postoperative evolution was good. Conclusion: Clinicians and pathologists should recognize the early discovery of MAKC in neonatal age. The clinical diagnosis strongly guided by the radiological approach is confirmed by the pathological anatomy insofar as the therapeutic sanction is surgical in the majority of the cases.

Usefulness of prenatal magnetic resonance imaging in differential diagnosis of fetal congenital cystic adenomatoid malformation and bronchopulmonary sequestration

BACKGROUND Congenital cystic adenomatoid malformation(CCAM)and bronchopulmonary sequestration(BPS)are the most common lung diseases in fetuses.There are differences in the prognosis and treatment of CCAM and BPS,and the clinical diagnosis and treatment plan is usually prepared prior to birth.Therefore,it is quite necessary to make a clear diagnosis before delivery.CCAM and BPS have similar imaging features,and the differentiation mainly relies on the difference in supply vessels.However,it is hard to distinguish them due to invisible supplying vessels on some images.AIM To explore the application value of magnetic resonance imaging(MRI)in the differential diagnosis of fetal CCAM and BPS.METHODS Data analysis for 32 fetuses with CCAM and 14 with BPS diagnosed by prenatal MRI at Huzhou Maternal and Child Health Care Hospital and Anhui Provincial Children’s Hospital from January 2017 to January 2020 was performed to observe the source blood vessels of lesions and their direction.Pathological confirmation was completed through CT examination and/or operations after birth.RESULTS After birth,31 cases after birth were confirmed to be CCAM,and 15 were confirmed to be BPS.The CCAM group consisted of 21 macrocystic cases and 10 microcystic cases.In 18 cases,blood vessels were visible in lesions.Blood supply of the pulmonary artery could be traced in eight cases,and in 10 cases,only vessels running from the midline to the lateral down direction were observed.No lesions were found in four macrocystic cases and one microcystic case with CCAM through CT after birth;two were misdiagnosed by MRI,and three were misdiagnosed by prenatal ultrasonography.The BPS group consisted of 12 intralobar cases and three extralobar cases.Blood vessels were visible in lesions of nine cases,in four of which,the systemic circulation blood supply could be traced,and in five of which,only vessels running from the midline to the lateral up direction were observed.Three were misdiagnosed by MRI,and four were misdiagnosed by prenatal ultrasonography.CONCLUSION CCAM and BPS can be clearly diagnosed based on the origin of blood vessels,and correct diagnosis can be made according to the difference in the direction of the blood vessels,but it is hard distinguish microcystic CCAM and BPS without supplying vessels.In some CCAM cases,mainly the macrocystic ones,the lesions may disappear after birth.

Antenatal Diagnosis and Outcome of 12 Congenital Cystic Adenomatoid Malformation of Lung

Objective To investigate the ultrasonic detection probability, type, prenatal diagnosis, and outcome of congenital cystic adenomatoid malformation of lung （CCAM）. Methods In this retrospective study, all 12 cases which were diagnosed with suspected prenatal CC,4M over the period in the hospital were analyzed. Information on diagnosis time, types and progression of the lesions during pregnancy, the additional abnormalities, and the outcome of pregnancies were recorded.Results The positive rate of ultrasonic detection of CCAM was about 1.01‰ （1/11 124） before 28 gestation weeks. There were 1 case of type Ⅰ （8%）, 2 cases of type Ⅱ （17%） and 9 cases of type Ⅲ （75%）. Nine pregnancies were terminated and 2 cases were confirmed by pathology. Three neonates were alive and without any symptom now. Conclusions Type Ⅲ is the major type. Ultrasound examination during 20-28 weeks and following up, prenatal consultation, chromosome examination offetus, delivery with a pediatrician standing by, and all suspected neonates being investigated are recommended.