My wife is suffering from tubacular lymphednitis (confirmed by fnac last year) on the left side of the lymph node of neck. It is in cervical lymph node and is in swollen condition. She took t. B. Medicine and during t. B. Treatment swollen lymph node started coming to the normal shape. But after the 5th month of medicine, lymph node suddenly started increasing its size. In the seventh month we done the ultra sound of that lymph node, which showed there is a pus inside it. I have also gone for the fnac again and it again showed that t. B. Infection is still there. For further clarification and the drug sensitivity, I go for the culture test of myco bacterium of t. B. Of the pus aspirated from swollen lymph node, which further show negative results as no afb came in that. This situation has become very complicated as fnac show t. B. Infection but culture shows no signs of t. B. Infection. I again go for the fnac which again came positive with t. B. Infection and after that I have also gone for the histopathology for the specimen of the lymph node and again the culture of the specimen of the lymph node, its again came negative. Histopathology only showed inflammation and necrotising nothing else. So please suggest something helpful as the situation is very complicated as fnac test is showing t. B. Infection and other test are coming negative.