A bit late, but wanted to give a quick update.  After the first day of chemo last week, Lincoln was put on a different regimen for his nausea which definetly helped.  We didn't have anymore ER visits and were able to stay ahead of the vomiting.  This week, Lincoln has been at school and is doing great.  He is always so happy when he gets to do normal things, we love seeing him like that.
Also, wanted to share that the Tumor Board and Neurosurgeon have all agreed that Lincoln does not need another surgery at this time.  They seem to agree that it is a nongrowing teratoma and we will continue to watch it.  This is a great relief, the thought of going through another brain surgery was just horrible.  So now we are just adjusting to the fact that we may never be completely out of the woods, since we will continue to monitor the mass.  We are realizing we had false expectations that we would finish chemo and radiation and this would all be behind us.  
Anyway, we are so grateful for all of your support and love.  As of now, our next (and final!!!) round of chemo is scheduled for the week of 3/12.