My son is 3 yrs old. He always has enlarged lymph node in his neck when he got any infection. 2 months ago he had an enlarged one for almost 10 days then it shrunk to almost 1.8-2 cm and since then ut is still the same size. All his cbc counts and aome viral tests came normal but according to his Dr. I must keep observing it. I am worried sick it might be lymphoma. I want to know if there is any chance that its notmal size is 2 cm or it really should be less and can a lymphnode say enlarged for more than 8-9 weeks for normal reasons. Plz help I am worried sick