http://www.aafp.org/afp/981015ap/ferrer.html
i didnt read through this that carefully, this seems to be an abstract or a study from the ut health science center in san antonio. has a list and possible causes for lymphadenopathy, which we all know one them is hiv,but there are many other causes too. only info guys..
There are many, many things that can cause enlarged lymph nodes.
Yes, it could be cancer--blood tests don't show all of these.
TB is another possibility,
as are other infections
AND MOST IMPORTANTLY - This is only one of a number of different symptoms, and typically, the symptoms do not occur singly--that is, a person has a number of symptoms occurring at the same time.
Easiest way- google it and you will find more reasons for gland swelling than you were looking for.
And most important, you need to leave them alone. If you keep messing with them it can cause them to swell and stay swollen.