Swollen lymph nodes in neck 3+ months neg for malignancy (ct scan). Cbc normal. No pain or discomfort.?

Close observation. If they are growing in size, i would strongly consider an excisional biopsy to make sure there is not any evidence of lymphoma or any types of infection.
I am confused. Ct could characterize the size of the nodes and give hints about the concern, but only a biopsy would definitively rule out malignancy.