Fructose breath hydrogen test--is it really a harmless diagnostic procedure?

Area of Science:

• Gastroenterology
• Pediatric Medicine
• Clinical Diagnostics

Background:

• Hydrogen breath tests are standard, non-invasive tools for diagnosing chronic abdominal pain in outpatients.
• These diagnostic procedures are generally considered safe, sensitive, and specific.
• The fructose breath hydrogen test is frequently used in clinical practice.

Observation:

• A 13-year-old male patient presented with chronic abdominal pain and growth retardation.
• The patient had a prior misdiagnosis of hereditary fructose intolerance (HFI).
• During a fructose breath hydrogen test, the patient experienced life-threatening adverse effects.

Findings:

• The case highlights a severe adverse event during a fructose breath hydrogen test in a patient with undiagnosed hereditary fructose intolerance.
• This underscores the critical need for thorough patient evaluation prior to the test.
• Misdiagnosis of HFI can lead to dangerous complications when undergoing specific diagnostic tests.

Implications:

• It is crucial to exclude hereditary fructose intolerance (HFI) through a detailed dietary history before administering a fructose breath test.
• Medical supervision is essential during fructose breath testing, especially in pediatric patients.
• Molecular genetic analysis is the preferred diagnostic method if HFI is suspected.