The presence of Klebsiella pneumoniae infection is not lung cancer. Klebsiella pneumoniae can easily lead to pneumonia, and when the resistance of the body is lowered, it can enter the lungs through the respiratory tract and cause lobar or lobular pneumonia, especially the upper lobe is more common. When Klebsiella pneumoniae infection occurs, it can cause tissue necrosis, liquefaction or abscess formation in the alveoli, and early treatment with antibiotics is the key to cure. Aminoglycoside antibiotics are the preferred medications. Adults can use gentamicin, kanamycin, tobramycin, or butamidokanamycin, which can be given intramuscularly or by intravenous drip. Klebsiella pneumoniae is a type of lung infection, not lung cancer, and the presence of lung cancer is often associated with prolonged coughing, sputum, or hemoptysis, which can often be diagnosed with a chest CT.