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Physiology and pathophysiology of the esophagus in childhood
Insights
Gastroesophageal reflux (GER) in infants is common, but persistent GER after 6-9 months indicates a pathological condition. Clinical signs may cease, but severe complications like esophagitis can still develop.
Area of Science:
- Pediatric Gastroenterology
- Esophageal Motility Disorders
Background:
- Gastroesophageal reflux (GER) is a significant esophageal disorder in early childhood.
- Inadequate relaxation of the lower esophageal sphincter (LES) is a key pathogenetic factor.
- Esophageal motor coordination issues are common in newborns.
Purpose of the Study:
- To elucidate the natural history and pathological progression of gastroesophageal reflux in infants.
- To differentiate between physiological reflux and pathological GER requiring intervention.
- To highlight potential severe complications of persistent infant GER.
Main Methods:
- Observational analysis of GER development and resolution in infants.
- Correlation of GER onset and persistence with age-related maturation.
- Documentation of clinical signs, complications, and long-term outcomes.
Main Results:
- Physiological GER is common in the first months, often resolving by 6 months.
- GER persisting beyond 6-9 months is considered pathological and unlikely to resolve spontaneously.
- Clinical signs of reflux may resolve between 6-12 months, masking ongoing pathological reflux.
- Severe complications include reflux-induced apnea, esophagitis, brachyesophagus, and endobrachyesophagus.
Conclusions:
- Persistent GER beyond 6-9 months in infants represents a pathological entity.
- The apparent resolution of clinical signs does not always indicate spontaneous healing.
- Early recognition and management of pathological GER are crucial to prevent severe esophageal complications.
Abstract:
Gastroesophageal reflux (GER) is the most important disorder of the esophagus and the lower esophageal sphincter (LES) in early childhood. Functional disturbances with inadequate relaxation of the LES have to be considered as pathogenetic factors. In the 1st month many newborns have some disorder of motor coordination of the esophagus. After that time, persisting GER may be seen as a delay in maturation, which fades away by the end of the first half year. GER after 6-9 months is to be considered as a definitively pathological condition that will not spontaneously normalize. Nevertheless, it is important to realize that the typical clinical signs of reflux stop generally between the 6th and 12th month, and so simulate healing independent of whether spontaneous maturation occurs or there is continued existence of reflux. Reflux-induced apneic spells are severe complications of this esophageal disorder in the 1st year of life. Esophagitis, usually a late complication, occurs when the aggressive factors win their fight against clearance and mucosal resistance of the esophagus. Brachyesophagus and endobrachyesophagus are severe late complications.