Cystic fibrosis and Down's syndrome: not always a poor prognosis

Area of Science:

• Pediatrics
• Medical Genetics
• Pulmonology

Background:

• Mosaic Down syndrome is a genetic condition with variable expressivity.
• Cystic fibrosis is an inherited disorder affecting multiple organs, primarily the lungs and pancreas.
• Bronchiolitis is a common respiratory infection in infants and young children.

Observation:

• A pediatric patient presented with symptoms suggestive of bronchiolitis.
• Diagnostic evaluation revealed the co-occurrence of mosaic Down syndrome and cystic fibrosis.
• The patient exhibited a high sweat osmolality and a homozygous delta F508 genotype, confirming cystic fibrosis.

Findings:

• The child demonstrated a bronchiolitis-like illness.
• Karyotype analysis confirmed mosaic Down syndrome.
• Cystic fibrosis was diagnosed based on elevated sweat osmolality and homozygous delta F508 mutation.
• Despite pancreatic insufficiency, the child is clinically stable at seven years of age.

Implications:

• This case highlights the possibility of co-occurrence of genetic disorders.
• It underscores the importance of comprehensive diagnostic approaches in complex pediatric cases.
• The favorable outcome suggests potential for effective management of combined genetic conditions.