A Case of Biotinidase Deficiency in an Adult with Respiratory Failure in the Intensive Care Unit

Background: Biotinidase deficiency (BD) is a rare, inherited autosomal recessive disorder that is treatable within childhood. We present a patient with pneumo-nia and respiratory acidosis who was not diagnosed with any systemic disorders; the patient was finally diagnosed as BD.Case Report: A thirty-year-old woman was admitted to the emergency department with respiratory failure that had persisted for a few days and progressively weakening over the previous six months. Then, the patient was admitted to the intensive care unit with marked respiratory acidosis, respiratory failure and alterations in consciousness. At the follow-up, the patient was not diagnosed with a systematic disorder. Rather, the patient's historical clinical findings sug-gested a metabolic disorder. Finally, the patient was diagnosed with biotinidase deficiency.Conclusion: Even though biotinidase deficiency is not frequently seen in the intensive care unit, metabol-ic syndromes such as biotinidase deficiency should be considered. Patients should be evaluated holistically with attention to medical history, family history and clinical findings.

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