Few foci of fibrosis in both upper lungs are often shadows left after the original lungs have recovered from an infectious disease; these shadows are denser, have clearer margins, and generally have no obvious clinical significance. These shadows are denser, with clearer margins, and are generally not clinically significant. They are particularly common in patients with tuberculosis, and are fibrous, striated, mechanized, calcified, and other similar shadows that remain after recovery. Some patients may present with manifestations such as hemoptysis, which is not necessarily a recurrence of tuberculosis, but often an infection of the fibrous foci, causing a small amount of hemoptysis, which can be clinically considered as bronchiectasis. If a few fibrous foci are found in both lungs, regular clinical review is sufficient.