If your doctor thinks it's necessary to do more investigating, then I think that's a good thing. To many doctors do too little testing.

The lump is probably enlarged lymph nodes. Has he ordered a chest x-ray or anything else for the TB? Has she had other symptoms?

I would suggest taking a list of your questions to the office visit and make the doctor answer them. Particularly, what he is looking for in the FNAC, what happens if it's negative or positive, what treatment she should receive, what the prognosis is, what other tests she should have, is she contagious, what are the odds that the TB test is wrong, what other possibilities are there, etc. You will feel much more in control and able to make decisions if you are fully informed.

Be nice, but firm when you ask these questions and don't let the doctor dismiss you. After all, you are paying him, right?

Let us know what the doctor says.

Igot te X-ray of chest done too which was normal.
FNAC result are ok. Thereis nothing found in it abnormal. I got the CECT / CT scan also done for neck and chest. they too are showing nothing abnormal except for the infllamation of nodes - size 18 mm x 9 mm. Nothing in lungs, chest etc.and no co-relation with lump. FNAC and CT both suggests it can be because of some infection in th body.

doctor has finally advised for some ant-biotic and anti-inflammatory drug for 7 days.
reg TB gold test being positive, he says that it indicates only latent tb (wich most of us may have)and doctor says we can wait and watch that as nohing similar has come in CT and FNAC. Hope things become ok now.