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Updated: Aug 11, 2025

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Published on: June 11, 2012
Kwashiorkor after gastric bypass.
Raelina S Howell1, Shrey Shah1, Saila Khan1
1Department of Surgery, NYU Langone Hospital-Long Island, New York, USA.
Gastric bypass can lead to severe protein deficiency, causing Kwashiorkor, a rare condition. Medical professionals should consider this risk in patients with malnutrition after weight-loss surgery.
Area of Science:
- Bariatric surgery
- Nutritional science
- Endocrinology
Background:
- Gastric bypass surgery is a popular bariatric procedure for morbid obesity.
- The surgery can worsen pre-existing nutritional deficits due to reduced intake and malabsorption.
- Severe protein deficiency is a potential complication, though rare.
Observation:
- A case study of a female patient who underwent gastric bypass surgery is presented.
- The patient developed Kwashiorkor, a severe protein-energy malnutrition syndrome.
- This highlights a rare but serious potential outcome of the procedure.
Findings:
- Kwashiorkor incidence after gastric bypass is reported at 4.7%.
- The case illustrates the link between gastric bypass and the development of severe malnutrition.
- Prompt recognition is crucial for patient outcomes.
Implications:
- Healthcare providers should maintain a high index of suspicion for Kwashiorkor in post-bariatric surgery patients with malnutrition symptoms.
- Awareness of this complication can lead to earlier diagnosis and intervention.
- Further research into nutritional monitoring post-gastric bypass may be warranted.
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