Metastases in the lungs on an x – ray look like?
Lung tissue in normal air and the x-ray inspection is not rendered. Reflect x-rays and determined in the picture, only the roots of the lungs, and partly vascular pattern. The appearance of any seal of the lung tissue with a decrease in lightness on the x-ray is manifested in varying intensity and forms of the blackouts.
Lung metastases on x-ray are diagnosed more often than in other organs. This is due to the need for constant gas exchange between the respiratory system and any other in the body. Each organ has a rich blood supply and receives from the lungs oxygenated (rich in oxygen) blood. And back from the organs to the lungs returns blood without oxygen. Sprout vessels and abundantly krovosnabjaemah and cancers, the blood of which, together with atypical cells, also participates in the General gas exchange.
Cancer confirms the nature of the fading x-ray and other symptoms, which are determined along with metastasis. In some cases, indirect evidence may indicate the presence of metastases, which are not yet determined by x-rays in the picture due to their small size in the initial stages.
- Miliary kartsinoz. This feature is a collection of different small shadows that are located around the cancerous lesion. Shadow biliarnogo carinosa very small. Their size can be 0.5-1 cm This creates a need for differentiation of metastases with miliary pulmonary tuberculosis. Multiple metastases can be distributed throughout the image of the lung fields, but are mostly on the periphery of the lungs. Microfocal dissemination appears in the result of the gradual dissemination of tumor cells through the vessels with blood flow and engagement of different parts of the lungs. If you define a cavity, it indicates the decay of tumor formation.
- Areas of darkening due to hypoventilation.
- Signs of bronchial obstruction.
- Pseudoplasmodia. It is dimmable, resembling shadows from seal lung tissue, characteristic of pneumonia. They arise as a result of the formation of chronic inflammatory lesions and as a consequence sealing the lung tissue around the metastasis.
- Cancer pleural effusion. In the pleural cavity is collected exudate resulting from cancerous lesions of the lung tissue. Some lung metastases may remain long-term defined as a specific shade, to hide behind the pleurisy. Therefore, the pleurisy of unknown etiology should always raise suspicion. Pain in the lungs occur when the cancer involvement in the process of pleura. In other cases, they do not occur. Most often this occurs in the early stages when mesothelioma.
- Characteristic of lung cancer is the preservation of lung pattern in areas not affected by metastases.
- Lymphangitis. This symptom is a in the x-ray shadow of the looping, tistou structure, starting from dilated roots of the lungs. They accompany the bronchi and vessels. Cancer from tuberculous lymphangitis is characterized by the presence of a more pronounced large track with wide turns.
For late-stage cancer and other lung pathologies characterized by the hardening of the lung tissue. Areas of sclerosis (proliferation of connective tissue) are of different size and intensity dimmer. This greatly complicates diagnosis.
Relatively difficult to see the metastases in the sternum, which covers them with its shadow. To visualize the actual lateral projection x-ray study.
The cancer metastases from different organs have some distinct features. Thus, metastasis of breast cancer, stomach often have a size of about 1 cm, but sometimes can reach 5-6 cm. their Shape is often spherical. For this type of cancer is characterized by rapid spread through the lymphatic system. This leads to an increase of regional lymph nodes, including nodes of the mediastinum and extension roots of the lungs.
An alternative method for diagnosing lung metastasis in the early stages, is a CT scan using contrast. It allows you to identify lesions smaller than 0.5 cm. Considering that the metastases in this size do not cause any patient complaints or clinical manifestations on CT they are often a godsend. Either diagnosed in patients with cancer of other organs, which are purposefully doing CT for the detection or exclusion of metastases already diagnosed with tumors in different organs, including the lungs.