Newborn Screening Saves Lives but Cannot Replace the Need for Clinical Vigilance

Area of Science:

• Medical Genetics
• Pediatrics
• Pulmonology

Background:

• Newborn screening for cystic fibrosis (CF) is crucial for early detection and intervention.
• High sensitivity of newborn screening aims to identify affected infants promptly.
• False-negative results, though rare, pose a diagnostic challenge.

Observation:

• A case report of a young male with cystic fibrosis is presented.
• The patient had a negative newborn screening result for CF.
• Clinical symptoms suggestive of CF were present since infancy.

Findings:

• The patient was diagnosed with cystic fibrosis at three years of age.
• Delayed diagnosis occurred despite the presence of early-onset CF symptoms.
• The delay resulted in significant diffuse lung damage and impaired growth.

Implications:

• Clinicians must maintain awareness of CF clinical presentations, even with negative newborn screens.
• Prompt diagnosis is vital to prevent irreversible lung damage and growth issues in CF patients.
• This case highlights the importance of considering CF in infants with suggestive symptoms, regardless of newborn screening results.