Sarah -

Not sure I can add more than others on your question of why radiate only one side of your neck but did want to introduce myself as our situations are somewhat similar. I am 32 and have an 11 month old and a 2.5 year old an am currently undergoing radiation treatment. Have had 10 treatments so far out of a total of 30. I had a tumor on my tongue 4.5 years ago and only surgery and had a recurrence a few months ago. Because I had no nodal involvement ey are only radiating my tongue and not my neck and thaconclusion came after alot of challenging. I learned that thye really ty to avoid radiating any more tha they need to. Feel free to send me a message given the similarities of our current situation.