<s>[INST] please help me answer this  one. what is lung left apical infiltrates? cause they told me i have a tuberculosis, but i dont really believe it, im starting now my medication and they give me  medicine name QUADTAB (FILM-COATED TABLET FOR ANTITUBERCULOSIS. Please help me this question? [/INST] Thanks for your question on Chat Doctor. I can understand your concern. Possibility of tuberculosis is more in your case. But better to first confirm tuberculosis before starting these Chat Doctor.  Tuberculosis is common in upper lobes. This is because of high oxygen in upper lobes. So any upper lobe lesion must be investigated to rule out tuberculosis. So you need sputum examination for AFB, bronchoscopy and BAD (bronchoalveolar lavage) and CT thorax if required. If any of these is positive for tube, you need to take anti-tubercular  </s>