A foreign body cell is a formation in the tissues of the body caused by the ingress of solid particles of round shape and other composition, such as fragments of bones, metal or other substances that have entered the body from the outside. Since blood contains many components (proteins, red blood cells, leukocytes, platelets), such particles cannot be immediately detected, since blood cells mainly consist of protein, and the blood itself has a viscous shape, and thanks to this the particle enters tissues and organs in the form of a foreign body. Such particles contribute to the occurrence of an inflammatory process, the appearance of scars and lesions, as in pneumonia due to the ingress of microparticles into them. To combat foreign bodies, surgical treatments are used, removing scar tissue and administering drugs that dissolve foreign particles, or installing stents that will prevent cells from entering the vessels.