Inflammatory cell infiltrates are not cancer, but cancer can be combined with changes of inflammatory cell infiltrates. Inflammatory cell infiltration is a pathological change that occurs mainly due to pathogenic invasion. More commonly, acute attacks of chronic bronchitis, acute bronchitis, bronchopneumonia, and lung abscesses appear with inflammatory secretions exuding from the mucosal tissue of the lung, combined with congestion and edema. These changes contain a large infiltration of inflammatory cells, such as neutrophils, lymphocytes, macrophages, etc., caused by the invasion of pathogens such as viruses, bacteria, mycoplasma, chlamydia, etc. Patients with bronchopulmonary carcinoma may be invaded by pathogens and have obstructive pneumonia secondary to pathological changes that may manifest as inflammatory cell infiltration.