5/18/16:  We are in the middle of Round 4 Immunotherapy/Chemo this week.  The first 2 rounds were extremely rough, with flu like symptoms for 2 weeks.  Round 3 and 4 are much better andBurke continues to amaze us with his strength.  He is back to playing like a normal 4 year old now.  We will have a 2 week break, then Round 5, then a 2 week break and rescan everything.  Assuming he is still clear, he will start Accutane for 6 months and then we are considering putting him on a relapse prevention trial (DFMO) which will be a year or two of daily pills. Thanks again to everyone for your continued thoughts and prayers.