Thanks for coming to HCM.
Lymph node is second most common site for tuberculosis after lung and usually it is a paucibacillary disease
(bacterial load is low compared to lung tuberculosis). Usually the disease is cured by a course of ATT ( anti tubercular therapy) i.e 2 months of isoniazide, rifampicin, pyrazinamide
and ethambutol followed by 4 months of isoniazide and rifampicin.
Persistence of lymph node during or after treatment can be due to two conditions i.e either it is due to manifestation of hypersensitivity
or body immune response to dying bacterial proteins, which is the condition in most of case....or one is harbouring drug resistant bacilli.
If in doubt one can go for culture and sensitivity of aspirate of lymph node and if it is negative then nothing is to be worried of. Here lymph node can be surgically removed if there is cosmetic concern. If culture report is positive and if it is drug resistant tuberculosis
one will need treatment as per drug resistant tuberculosis protocol
Best wishes for your health...