Please please have your daughter checked, i've experienced the same problem, i discovered a lump in my throat, i had an ultrasound done which showed a tumor on my thyriod, i then had a biopsy which came back negative, but i know that i was have health issues and insteaded on second biopsy which came back negative again, the doctors said just leave it alone but i could feel that the lump had increased in size and insteaded on having the lump removed, after the surgury i was told it was cancer of the thyriod and the entire thyriod had to be removed not only that but they discovered that there was four lumps 2 that were 4cm and the there 2 were about 2-2.5 cm big these tumor were not discovered on the ultrasound,and i had radition and after a year was recovering only to rediscover more growth in ther same area and again i had surgery which was 8.5 hours long and this time they removed over 28 lumps of all sizes, anything that looks cancerous they removed, and again i had radition and this past dec again the tests didn't look good and again i had radition to kill off any cancer there might be growing, this has been a five year ordeal for me, and now i've discovered a lump behind my right ear which is why i was reading the blogs on this sight and now again i will instead on more tests, i know that if i hadn't insteaded over and over again the first surgery and the second surgery never would have happened and i would most likeily be dead because the tests were wrong but i knew that i am not well and wanted answers, you luvline26 please instead over and over until you have some answers cause the doctors wouldn't fight for your daughter and you have to fight for your daughter, i'm sorry if i've scared you with my story but i just had to let you know that i think that your daughter's story seems similar to what i had, i'll pray for your daughter's good health.