Management of Protein-Losing Enteropathy

Initial Diagnostic Workup

The American Heart Association recommends cardiac screening with echocardiography to evaluate for Fontan circulation, constrictive pericarditis, or other structural heart disease causing elevated central venous pressure 2, 3
The American Gastroenterological Association suggests endoscopy with biopsies to identify mucosal abnormalities, inflammation, or lymphangiectasia 3
Laboratory evaluation, including complete blood count, liver function tests, and serum albumin, is recommended to assess severity 3

The American College of Nutrition recommends restricting long-chain triglycerides to <5% of total energy intake to reduce intestinal chyle production and subsequent lymphatic protein loss 1
The American College of Nutrition suggests supplementing with medium-chain triglycerides (MCT) to >20% of total energy intake as MCT bypass intestinal lymphatics and are absorbed directly into the bloodstream 1
A high-protein intake of at least 1.2 g/kg actual body weight/day is recommended to compensate for ongoing losses 1
Ensuring adequate energy intake of at least 30 kcal/kg actual body weight/day is recommended to address malnutrition 1

For Fontan-related protein-losing enteropathy, the American Heart Association recommends considering heart transplantation for severe systemic ventricular dysfunction or refractory protein-losing enteropathy 1, 3
For constrictive pericarditis, the American Heart Association suggests performing surgical pericardiectomy as the definitive treatment 1, 3
For inflammatory bowel disease, the American Gastroenterological Association recommends initiating immunosuppressive therapy targeting the underlying inflammation 1, 4

The American College of Gastroenterology recommends prescribing budesonide for patients with hypoalbuminemia poorly responsive to other therapies 1
Monitoring closely for signs of hypercortisolism is recommended as budesonide has fewer but not absent systemic effects compared to other oral steroids 1

The American College of Gastroenterology suggests measuring serum albumin levels regularly to evaluate treatment efficacy 1, 3
Performing repeat endoscopy with biopsies at 12 months after initiating treatment is recommended to assess response 1, 3
For cardiac causes, conducting regular cardiac evaluation with echocardiography and electrocardiogram is recommended 1

The American College of Gastroenterology recommends not delaying dietary modification while awaiting definitive diagnosis—the low long-chain triglyceride/high MCT diet is safe and beneficial across all etiologies 1
The American Heart Association suggests not overlooking cardiac causes in patients without obvious gastrointestinal pathology, as Fontan circulation and constrictive pericarditis are major contributors 2, 5
The American Gastroenterological Association recommends not continuing offending medications such as olmesartan if medication-induced enteropathy is suspected 1, 3
The American College of Gastroenterology suggests not relying solely on dietary management for inflammatory or infectious causes—these require targeted therapy for the underlying condition 1, 4