Which cancers are among the most common causes of malignant pleural effusion?

Which cancers are among the most common causes of malignant pleural effusion?

• A. Lung Cancer
• B. Prostate Cancer
• C. Ovarian Cancer
• D. Leukemia

Answer: (A)

Malignant pleural effusion happens when cancer cells invade the pleural space or block the lymphatic drainage of the pleura, causing fluid to accumulate that contains malignant cells. Cancers that most commonly involve the pleura and shed malignant cells into the pleural fluid are those that frequently metastasize to the chest cavity. Lung cancer is the most frequent cause of malignant pleural effusion in adults because it readily invades the pleura and seeds malignant cells into the pleural space. This makes pleural effusions malignant with high likelihood, especially as the disease advances. Prostate cancer, ovarian cancer, and leukemia can cause pleural effusions, but they are far less common sources of malignant effusions. Prostate cancer tends to spread to bone and other sites rather than the pleura in many scenarios; ovarian cancer can involve the pleura but less commonly compared to lung cancer; leukemia can lead to effusions through various mechanisms, but malignant involvement of the pleura is not as typical a pattern as with solid tumors like lung cancer. Thus, among the options, lung cancer stands out as the most common cancer causing malignant pleural effusion.

Malignant pleural effusion happens when cancer cells invade the pleural space or block the lymphatic drainage of the pleura, causing fluid to accumulate that contains malignant cells. Cancers that most commonly involve the pleura and shed malignant cells into the pleural fluid are those that frequently metastasize to the chest cavity.

Lung cancer is the most frequent cause of malignant pleural effusion in adults because it readily invades the pleura and seeds malignant cells into the pleural space. This makes pleural effusions malignant with high likelihood, especially as the disease advances.

Prostate cancer, ovarian cancer, and leukemia can cause pleural effusions, but they are far less common sources of malignant effusions. Prostate cancer tends to spread to bone and other sites rather than the pleura in many scenarios; ovarian cancer can involve the pleura but less commonly compared to lung cancer; leukemia can lead to effusions through various mechanisms, but malignant involvement of the pleura is not as typical a pattern as with solid tumors like lung cancer.

Thus, among the options, lung cancer stands out as the most common cancer causing malignant pleural effusion.