R.D.
It is tracheomalacia. This might be why you can't find any info. I work in a NICU, and we often see it. It is why our baby barks when he cries sometimes. the trachea is lined with cartilage rings. Cartilage like what makes up your babies ears. If this cartilage isn't strong enough, it easily collapses under stress. Like when your baby cries. It usually gets worse before it gets better, which is why you are seeing it now. If it gets too bad, your baby might need a trache, but that would be very rare! They will follow your baby, may do a sleep study to make sure his airway isn't causing him problems as he sleeps, eats, etc., until his airway gets stronger. Be sure to call your baby's doctor if he is having problems breathing, if he is making a sound everytime he breathes, or if you have any other concerns. I am curious how they diagnosed the tracheomalacia? did they do a bronchoscopy? If not, when you see the pulmonologist, there is a chance the doc will want this test done. It is very simple, they look at your child's trachea by taking a special camera down through the mouth into your baby's trachea so they can look at it. it's very simple and quick, doesn't require any anesthesia.
Good luck, feel free to ask me anymore questions. I hope all goes well. Remember, your baby will outgrow this over time. You are in the worst of it right now.