Safety and Ethics in Endoscopic Studies in Children: Evidence From the BEECH Study in Zambia

Area of Science:

• Pediatric Gastroenterology
• Global Health
• Intestinal Diseases

Background:

• Environmental enteropathy (EE) is a significant cause of malabsorption and stunting in children globally.
• While non-invasive diagnostic methods are sought, endoscopic biopsy remains crucial for detailed intestinal analysis (histology, RNA sequencing).
• Limited data exists on the safety of endoscopic biopsy in young, vulnerable children, particularly in resource-limited settings.

Purpose of the Study:

• To evaluate the safety and feasibility of upper gastrointestinal endoscopy with biopsy in children suffering from stunting in Zambia.
• To assess the ethical considerations surrounding endoscopic procedures for research in pediatric populations.
• To explore the potential clinical utility of endoscopy in diagnosing conditions like environmental enteropathy.

Main Methods:

• The study involved 119 children with stunting (length-for-age z-score ≤ -2) undergoing upper gastrointestinal endoscopy.
• Procedures were conducted in Lusaka, Zambia, with conscious sedation administered by anesthetists.
• Safety outcomes, adverse events, and clinical information derived from endoscopy were meticulously recorded.

Main Results:

• A total of 119 children underwent endoscopic biopsy, with only 5 (4%) experiencing transient desaturation; no serious adverse events were reported.
• No specific clinical, demographic, or anesthetic factors predicted desaturation.
• Endoscopy provided clinically useful information in two children, including one life-saving diagnosis. Lactase deficiency was identified in 54% of tested children.

Conclusions:

• Endoscopic biopsy is a safe procedure for children with stunting in resource-limited settings.
• The study met ethical preconditions for research, demonstrating safety and potential clinical benefit.
• Findings support the continued use of endoscopic biopsy for investigating environmental enteropathy and related conditions in pediatric populations.