Abnormal striated shadow in the lingual segment of the upper lobe of the left lung. Striated shadow is an imaging term that refers to an increased density shadow in the lungs found by imaging such as chest CT and X-ray. It suggests that this area of the lung may have had an inflammatory infection and has now become connective tissue, a type of scar tissue. A small amount of fibrosis will not have a significant effect on the body, while a large amount of fibrosis may affect lung function. It may also be due to long-term smoking or people who work with dust, such as carpenters, hairdressers, coal miners, stonemasons and so on. It may be accompanied by chest pain, chest tightness, cough, sputum, and even a little blood in sputum. If the left lobe tongue segment cord shadow is accompanied by clinical manifestations, further examination and standardized treatment are required. If there is no clinical manifestation, it can be followed up regularly. It is recommended that the patient go to a regular hospital as soon as possible and listen to the advice of a specialized doctor.