What it is (overview)

A pleural biopsy with imaging guidance is a diagnostic procedure that removes a small sample of tissue from the pleura—the thin lining that surrounds the lungs and lines the inside of the chest wall. The sample is examined under a microscope (often with special stains and lab tests) to look for the cause of pleural abnormalities such as pleural thickening, nodules, or a persistent pleural effusion (fluid around the lungs).

“Imaging guidance” means the clinician uses real-time imaging—most commonly ultrasound or CT (computed tomography)—to precisely target the abnormal area and safely guide the needle to the pleura. This approach improves accuracy and can reduce the risk of complications compared with a “blind” biopsy. The procedure may be performed with a needle through the skin (percutaneous needle biopsy) and is different from thoracentesis, which removes pleural fluid; a pleural biopsy removes tissue.

What the results mean in plain language: The test helps your healthcare team determine whether the pleural problem is due to an infection, inflammation, scarring, or a tumor/cancer. Results may show:

• Malignant (cancer) cells in the pleura (for example, metastatic cancer or mesothelioma), which helps guide cancer staging and treatment.
• Infection (such as tuberculosis or certain fungal/bacterial infections), supporting targeted antibiotic or anti-tuberculosis therapy.
• Inflammation without cancer (for example, autoimmune-related pleuritis), which may lead to anti-inflammatory or immune-based treatment.
• Non-diagnostic/insufficient tissue, meaning the sample did not contain enough abnormal pleura to make a clear diagnosis; additional testing (repeat biopsy, thoracoscopy, or further imaging) may be recommended.

When & why it's usually done

A pleural biopsy with imaging guidance is usually ordered when imaging (like a chest X-ray, CT scan, or ultrasound) shows changes in the pleura or when a pleural effusion has no clear cause after initial evaluation. The goal is to get a definitive diagnosis so treatment can be chosen appropriately.

Your clinician may recommend this biopsy procedure if you have:

• A persistent or recurrent pleural effusion, especially if fluid tests from thoracentesis do not explain why fluid is building up.
• Pleural thickening, pleural-based masses, or suspicious areas seen on CT or ultrasound (possible tumors).
• Symptoms such as shortness of breath, chest pain (often sharp and worse with deep breaths), unexplained cough, fever, night sweats, or unintended weight loss along with abnormal pleural findings.

It may also be considered when certain risk factors raise concern for serious pleural or lung disease, including:

• A personal history of cancer (lung, breast, lymphoma, or others) where spread to the pleura is possible.
• Potential exposure to asbestos (a risk factor for pleural mesothelioma and pleural plaques).
• Risk for tuberculosis or other chronic infections.
• Known or suspected autoimmune disease (such as rheumatoid arthritis or lupus) that can inflame the pleura.

Imaging guidance is used to improve precision—helping the clinician avoid blood vessels and lung tissue while sampling the area most likely to provide an answer. In many cases, this can reduce the need for more invasive procedures, though some patients may still need thoracoscopy if the biopsy does not yield a diagnosis.

Common diseases related to it

• Malignant pleural effusion (cancer-related fluid around the lungs)
• Metastatic cancer to the pleura (commonly from lung cancer, breast cancer, ovarian cancer, gastrointestinal cancers)
• Malignant pleural mesothelioma
• Tuberculous pleuritis (tuberculosis involving the pleura)
• Bacterial pleuritis/empyema (infection in the pleural space)
• Fungal pleural infection (less common, depends on region and immune status)
• Pleuritis from autoimmune disease (e.g., systemic lupus erythematosus, rheumatoid arthritis)
• Benign pleural thickening or fibrosis (scarring)
• Asbestos-related pleural disease (pleural plaques, diffuse pleural thickening)
• Unexplained exudative pleural effusion (when fluid characteristics suggest inflammation/cancer but the cause is unclear)

Health goals where it may help

• Clarifying the cause of pleural effusion to guide the right treatment (antibiotics, anti-tuberculosis therapy, anti-inflammatory medications, or cancer care)
• Early detection or confirmation of pleural tumors to support timely diagnosis and next steps
• Cancer staging and treatment planning when malignancy is suspected or already known
• Ruling out serious disease (such as cancer or tuberculosis) when imaging shows pleural abnormalities
• Improving breathing and quality of life by identifying treatable causes of fluid around the lungs
• Guiding specialist care (pulmonology, oncology, infectious disease, or rheumatology) based on tissue diagnosis