A well-defined fibrous streak shadow can be seen in the lower lingual segment of the upper lobe of the left lung may be scar tissue, tuberculosis, lung nodules, etc.
1. Scar tissue, due to previous lung infectious diseases such as pneumonia, can produce damage to the local tissue of the lung. This results in fibrotic changes in the local tissue, which is characterized by increased density and a well-defined fibrous streak.
2. Tuberculosis, due to Mycobacterium tuberculosis infection, resulting in localized tuberculosis foci, recovery can form old tuberculosis foci, the typical performance of clear boundaries, higher density and so on.
3. Lung nodules, due to environmental stimuli and other reasons, resulting in lung nodules, which can be manifested as cords and need timely pathological examination to clarify the specific nature.
It is recommended to consult a doctor in time and conduct relevant examinations under the doctor’s guidance to clarify the specific causes of the disease.