The Necessity of Magnetic Resonance Imaging in Congenital Diaphragmatic Hernia.

This is a retrospective study investigating the relationship between ultrasound and magnetic resonance imaging (MRI) examinations in congenital diaphragmatic hernia (CDH). CDH is a rare cause of pulmonary hypoplasia that increases the mortality and morbidity of patients. Inclusion criteria were: patients diagnosed with CDH who underwent MRI examination after the second-trimester morphology ultrasound confirmed the presence of CDH. The patients came from three university hospitals in Bucharest, Romania. A total of 22 patients were included in the study after applying the exclusion criteria. By analyzing the total lung volume (TLV) using MRI, and the lung to head ratio (LHR) calculated using MRI and ultrasound, we observed that LHR can severely underestimate the severity of the pulmonary hypoplasia, even showing values close to normal in some cases. This also proves to be statistically relevant if we eliminate certain extreme values. We found significant correlations between the LHR percentage and herniated organs, such as the left and right liver lobes and gallbladder. MRI also provided additional insights, indicating the presence of pericarditis or pleurisy. We wish to underline the necessity of MRI follow-up in all cases of CDH, as the accurate measurement of the TLV is important for future treatment and therapeutic strategy.

The Benefits of MRI in the Prenatal Diagnosis of Congenital Diaphragmatic Hernia.

Aims: We searched for correlations between ultrasound findings in pregnancies with congenital diaphragmatic hernia (CDH) and magnetic resonance imaging (MRI) follow-up examinations; MRI was used to confirm and complete the investigation in these difficult cases. In some of them, new elements that ultrasound was not able to fully describe have been also brought. We were especially interested when MRI was superior to ultrasound. Material and methods: This is a retrospective study of 12 pregnancies with congenital diaphragmatic hernia that were diagnosed in two major university clinics of Bucharest, Romania. Ultrasounds and MRI examinations were performed to evaluate pulmonary hypoplasia and correctly asses the herniated organs. We used standard international protocols and guidelines for calculating different parameters. All patients signed an informed consent before being enrolled in the study. Results: We described the herniated organs, dimensions of the hernia and the remaining lung capacity, so that we could correctly evaluate the prognosis. We have also used the lung to head ratio (LHR) in an attempt to better determine the degree of lung hypoplasia. Conclusion: High quality ultrasound followed by an MRI examination helped correctly assess the prognostic, treatment possibilities and total affected lung volume. It not only confirmed the diagnosis, but also offered new information that ultrasound was not able to provide.