###Human: There is a neck swelling and Mantoux test shows 15 mm raised surface. Can it be TB? ###Assistant: Hi. I have reviewed your query and here is my advise. The swelling could be due to infective enlarged lymph nodes, reactive node enlargement or tuberculosis. You cannot rely on the Mantoux test. It is not the test for tuberculosis. To confirm tuberculosis and to rule out the nature of lesion you need to investigate with fine needle aspiration cytology. In this investigation, a needle is inserted into an enlarged node and material taken outside over slide which is stained and examined under the microscope. It is five minutes OPD procedure, so do not worry about that.