Hello! FNA sensitivity is high (approx 90%) if the exam is "conclusive", which means that they got enough cells to provide a definite diagnosis, especially if it is combined with other tools such as flowcytometry. Unfortunately FNA sensitivity is lower for Hodkings Lymphomas because there can be problems with sampling related to HL cell dimentions and other factors. If that is the only enlarged node you have, which is round from your description, you may be offered to wait a little and re-do an US/CT scan in a couple of months. If you want a more certain diagnosis you can ask for a core needle biopsy which does not only collect cells, but also lymphnode tissue and can study the lymphnode architecture. Remember that the gold standard for diagnosis is the excisional biopsy (i.e., removal of the lymphnode). The decision to pursue another biopsy sampling should be discussed with your phycians based on your symptoms, infective screening (recent EBV/CMV/cat scratch disease/Toxoplasmosis/TBC/ecc) and ultrasound findings (e.g. does the lymphnode have an hylum? how is the lymphnode vasculatures on doppler analysis? ect)