Answer:
Down Syndrome wouldn't cause this.
Cancer is where your blood cells are involved so no.
Duchenne muscular dystrophy is where your limbs are effected so no.
Cystic fibrosis affects the cells that produce mucus, sweat, and digestive juices. It causes these fluids to become thick and sticky. They then plug up tubes, ducts, and passageways.
Symptoms vary and can include cough, repeated lung infections, inability to gain weight, and fatty stools.
So yes Cystic fibrosis is possibly the answer
BUT
Muscular dystrophy can also cause this as your muscles weaken over time. But most likely its Cystic fibrosis
