Inherited causes of exocrine pancreatic dysfunction

Area of Science:

• Pediatric Gastroenterology
• Pancreatic Physiology

Background:

• The exocrine pancreas exhibits functional immaturity at birth, with significantly reduced lipase and amylase activity compared to adult levels.
• Protease function is generally adequate, but lipase activity is only 5-10% of adult values in newborns and infants.
• Pancreatic amylase secretion is minimal at birth and remains low during early childhood.

Purpose of the Study:

• To review the functional status of the exocrine pancreas in newborns and infants.
• To categorize the causes of pancreatic dysfunction in childhood.
• To highlight the prevalence of hereditary conditions, particularly cystic fibrosis, in pediatric pancreatic disorders.

Main Methods:

• Literature review of pediatric pancreatic function and dysfunction.
• Analysis of common causes of exocrine pancreatic insufficiency in childhood.
• Emphasis on hereditary versus acquired conditions.

Main Results:

• Exocrine pancreatic function, especially lipase and amylase, is significantly underdeveloped at birth and in infancy.
• Functional disturbances of the pancreas are less common in children than adults.
• Hereditary conditions are the primary direct causes of pancreatic dysfunction in children, with cystic fibrosis being the most prevalent in Caucasian children.

Conclusions:

• Neonatal and infant pancreatic exocrine function is immature, impacting digestive enzyme activity.
• Childhood pancreatic dysfunction stems from hereditary or acquired causes.
• Cystic fibrosis is the leading inherited cause of exocrine pancreatic dysfunction in Caucasian children, while other genetic disorders are rare.