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Imaging for Diagnosis and Assessment of Necrotizing Enterocolitis
Vinayak Mishra1, Alain Cuna2, Rachana Singh3
1Department of Pediatrics, Grant Medical College and Sir JJ Group of Hospitals, Mumbai, Maharashtra, India.
Insights
Necrotizing enterocolitis (NEC) diagnosis is challenging. New imaging techniques like abdominal ultrasound (AUS) offer improved, noninvasive detection of this serious infant condition, aiding earlier treatment.
Area of Science:
- Neonatal Medicine
- Pediatric Gastroenterology
- Medical Imaging
Background:
- Necrotizing enterocolitis (NEC) is a severe intestinal necrosis affecting preterm infants, causing significant morbidity and mortality.
- Current diagnostic methods for NEC lack specificity and timeliness, hindering early intervention.
- Technological advancements are driving renewed interest in advanced imaging for NEC evaluation.
Purpose of the Study:
- To review and compare various imaging modalities for the diagnosis of necrotizing enterocolitis (NEC) in infants.
- To highlight the potential of newer, noninvasive imaging techniques in improving early NEC detection.
- To discuss the limitations of traditional radiography and the advantages of advanced imaging.
Main Methods:
- Review of existing literature on imaging techniques for NEC.
- Analysis of plain abdominal radiography findings, including pneumatosis intestinalis.
- Evaluation of the role and capabilities of abdominal ultrasound (AUS) as an adjunct to radiography.
- Discussion of emerging modalities such as contrast-enhanced ultrasound (CEUS), MRI, and NIRS.
Main Results:
- Plain radiography shows characteristic NEC features in 50-60% of cases but lacks sensitivity for early disease.
- Abdominal ultrasound (AUS) offers real-time assessment of perfusion, bowel wall, and peritoneal fluid with higher sensitivity for pneumatosis.
- Advanced modalities like CEUS, MRI, and NIRS show promise for improved NEC evaluation.
Conclusions:
- Early and accurate diagnosis of NEC remains a challenge, necessitating improved imaging strategies.
- Abdominal ultrasound (AUS) is a valuable, noninvasive tool that complements traditional radiography for NEC assessment.
- Emerging imaging technologies hold significant potential for enhancing the timely diagnosis and management of NEC in vulnerable infants.
Abstract:
Necrotizing enterocolitis (NEC) is inflammatory bowel necrosis of preterm and critically ill infants. The disease is seen in 6-10% of preterm infants who weigh less than 1500 g at birth and carries considerable morbidity, mortality, and healthcare cost burden. Efforts focused on timely mitigation remain restricted due to challenges in early diagnosis as clinical features, and available laboratory tests remain nonspecific until late in the disease. There is renewed interest in the radiological and sonographic assessment of intestinal diseases due to technological advances making them safe, cost-efficient, and supporting Web-based transmission of images, thereby reducing time to diagnosis by disease experts. Most of our experience has been with plain abdominal radiography, which shows characteristic features such as pneumatosis intestinalis in up to 50-60% of patients. Many patients with advanced disease may also show features such as portal venous gas and pneumoperitoneum. Unfortunately, these features are not seen consistently in patients with early, treatable conditions, and hence, there has been an unfulfilled need for additional imaging modalities. In recent years, abdominal ultrasound (AUS) has emerged as a readily available, noninvasive imaging tool that may be a valuable adjunct to plain radiographs for evaluating NEC. AUS can allow real-time assessment of vascular perfusion, bowel wall thickness, with higher sensitivity in detecting pneumatosis, altered peristalsis, and characteristics of the peritoneal fluid. Several other modalities, such as contrast-enhanced ultrasound (CEUS), magnetic resonance imaging (MRI), and near-infrared spectroscopy (NIRS), are also emerging. In this article, we have reviewed the available imaging options for NEC evaluation.
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