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Hypoxaemia and interstitial lung disease in an infant with hypothyroidism and hypotonia
  1. Melodie M Lynn1,
  2. Dawn Simon2 and
  3. Ajay S Kasi2
  1. 1Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
  2. 2Pediatric Pulmonology, Emory University School of Medicine, Atlanta, Georgia, USA
  1. Correspondence to Dr Ajay S Kasi; ajay.kasi{at}emory.edu

Abstract

A 7-month-old-term male infant presented with cough, tachypnoea, hypoxaemia and post-tussive emesis. Clinical history was significant for respiratory failure and pulmonary hypertension in the neonatal period requiring assisted ventilation, congenital hypothyroidism, mild hypotonia, recurrent respiratory infections, hypoxaemia requiring supplemental oxygen and nasogastric tube feeds. Physical examination showed tachypnoea, coarse bilateral breath sounds and mild hypotonia. Chest radiograph revealed multifocal pulmonary opacities with coarse interstitial markings and right upper lobe atelectasis. Following antibiotic therapy for suspected aspiration pneumonia, chest CT scan was performed and showed multiple areas of pulmonary consolidation and scattered areas of bilateral ground-glass opacities. Genetic studies showed a large deletion of chromosome 14q13.1–14q21.1, encompassing the NK2 homeobox 1 (NKX2-1) gene consistent with a diagnosis of brain–thyroid–lung (BTL) syndrome. Our case highlights the importance of genetic studies to diagnose BTL syndrome in infants with hypothyroidism, hypotonia and lung disease.

  • paediatrics
  • thyroid disease
  • interstitial lung disease

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Footnotes

  • Contributors Patient was under the care of DS and ASK. Report was written by all authors.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Patient consent for publication Parental/guardian consent obtained.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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