Below is an article talking about the timing of PET scan after RFA ( the same apply to microwave ablation) to check on the ablation result whether is successful or not. For practical purpose, just read the last paragraph will be enough.
Below is how the lymph flows through the lymph node. The size of a normal abdominal lymph node ( not swelling) can be 2mm to 20 mm in length and can be as long as 10 mm in width .
https://www.google.com/search?q=peripor … jWtem3M%3A
Below is an other article about different types of lymph nodes; read page 841 and page 842 ,table 1 and 2 , and figure 18 that is more related to the regional lymph nodes in liver cancer to increase the understanding how lymph node diagnosis in relationship with its size and scan results .
Please know that my personal opinion is not intended nor implied to be a substitute for professional medical advice. If provided, information are for educational purposes.Consult doctor is a MUST for changing of treatment plans.