When I called my parents this morning they said that they got the test results back for his parathyroid. The doctors thought that it might be the culprit for his unusually low calcium, but alas, the test results came back high instead of low. Also, Jimmy has to keep his calcium at least above a 1 (normal is 1.2 and last night he was at 0.6) for 24 hours before he can be released from the hospital. Sadly, the last two blood tests showed his levels at about 0.8, so there's no release date yet. However, the doctor is coming to discuss the latest results and the next steps in figuring this out in just a little bit, so hopefully we'll get some good news soon.
Happily, Jimmy is taking all of this fairly well and has been enjoying watching movies like Peter Pan and Lightning McQueen (Cars) and has been taking lots of walks around the hospital with Dad since it's pretty much a ghost town. He's been a brave kid to let them poke him and take blood every few hours.