26th April 2024

A 5-year-old boy with Down’s syndrome presents with a 2-month history of intermittent, high-pitched, noisy breathing, especially during exertion.

A 5-year-old boy with Down’s syndrome presents with a 2-month history of intermittent, high-pitched, noisy breathing, especially during exertion. His mother reports that he often seems to struggle for breath when playing. He has no history of recurrent respiratory infections, and there is no stridor at rest. His growth and development are consistent with his age and condition. On examination, he exhibits the typical facial features of Down’s syndrome and mild hypotonia.

Which of the following is the most likely diagnosis?