Is pleural effusion lung cancer?
Jul 11, 2025
Source: Cainiu Health
Dr. Ren Yi
Introduction
When lung cancer invades the pleura or obstructs lymphatic vessels, it can impair the circulation of pleural fluid, leading to pleural effusion. This type of effusion is often bloody and may be accompanied by symptoms such as coughing, hemoptysis, and chest pain. Cancer cells may be detected through fluid analysis or imaging studies, indicating a more severe condition. Pleural effusion can also be caused by other conditions, such as pleuritis, heart failure, and cirrhosis.
Generally speaking, pleural effusion is not necessarily caused by lung cancer; it may be induced by lung cancer or result from other diseases. If any abnormalities occur, timely medical consultation is recommended. Detailed analysis is as follows:
When lung cancer invades the pleura or obstructs lymphatic vessels, it can interfere with the circulation of pleural fluid, leading to pleural effusion. This type of effusion is often bloody and may be accompanied by symptoms such as coughing, hemoptysis, and chest pain. Cancer cells might be detected through effusion examination or imaging tests, indicating a more severe condition.
Pleural effusion can also be caused by other diseases such as pleurisy, heart failure, and cirrhosis. Pleurisy increases fluid secretion from the pleura due to inflammatory irritation. Heart failure elevates pleural venous pressure, causing fluid leakage. Cirrhosis reduces plasma albumin levels, allowing fluid to渗ate into the pleural cavity. These conditions are unrelated to lung cancer, and the effusion may decrease or disappear after effective treatment of the underlying disease.
If pleural effusion occurs, prompt medical attention is necessary to identify the underlying cause through appropriate diagnostic tests. Self-diagnosis or delaying treatment should be avoided to prevent adverse effects on the condition.
