<s>[INST] Yes my granddaughter went for her checkup and her Dr., noticed one side of her neck was swollen so she wanted a scan and the scan shows a problem and is making plans to send her to children s hospital in Dallas just wondering what it could be she will be 13 in August and has high functioning Ash burgers [/INST] Hi.... swelling on one side of the neck could be due to enlargement of lymph nodes in that region. This could happen due to various reasons like infection or acute supportive lymphadenitis or prolonged viral infections, or it could also be due to a neoplasm. The definitive or confirmatory diagnosis could be established only after a biopsy and histopathological examination of the sample. I suggest you go ahead with your doctors adviceRegards -  </s>