thanks for query and welcome to HCM...,
since 3 months, swelling of Lymphnodes
in the neck...,
area, How to asess as a Lymphoma...It could be Tuberculosis
thorough examination like ESR, X ray chest, Sputum examination, Mantoux test
and try to elicit the cause ..ok. so don't imagine yourself.., go to Pulmonologist ..,
(Chest specialist) and followw accordingly..o.k Bye..