No results (a.k.a. all samples appear normal) - so, no news. On the other hand, Ben is eating well and gaining weight again, and it may not be that important anyway.
Some background:
For months our pediatrician was convinced Ben was thin because he was just a kid that got sick a lot. She (and we) assumed once he stopped getting sick, he would gain weight. At one point, Ben got so thin, the doctor wanted to make sure we didn't 'miss' anything (anatomy, genetics, immunology, etc...). That's why we've been doing all these tests. After all this, it seems like the original assumption is true - Ben doesn't have 'deeper' problems. All sicknesses have been just a bunch of bad luck. We may pursue other tests, but if Ben keeps putting on the pounds, there's not much to get worried about. Hooray!
We're very grateful to everyone that keeps Ben in their thoughts and prayers. It has been difficult, and all your loving support helps - thank you.