Vomiting may be the Only Sign of Cystic Fibrosis: A Case Report

  • Husniye Yucel
  • Meltem Akcaboy Dr. Sami Ulus Maternity and Children's Health and Diseases Training and Research Hospital
  • Melek Melahat Oguz
  • Engin Demir
  • Saliha Senel
Keywords: Cystic fibrosis, hypokalemic hypochloremic alkalosis, Pseudo-Bartter syndrome


Cystic fibrosis has variable clinical presentations at different ages. We present here a-7-month-old boy admitted with vomiting, hypokalemia, hyponatremia, hypochloremia and metabolic alkalosis that corresponded to a pseudo-Bartter syndrome. He had been hospitalized twice because of vomiting of unknown origin. A sweat test had already been performed and the result was normal. He had been admitted to our pediatrics unit for diagnostic work-up. Reevaluation of physical examination, serum electrolytes, blood gases and cystic fibrosis mutation analysis finally led to a diagnosis of cystic fibrosis. We planned to call the attention to the often disregarded message that vomiting may be the only sign of cystic fibrosis. Sometimes invasive tests planned to investigate the etiology of vomiting should be postponed.


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