TürkçePleural biopsy is a diagnostic medical procedure in which a tissue sample is taken from the pleural membrane surrounding the lungs for microscopic examination. This method is primarily used to determine the cause of pleural effusion, pleural thickening, infections, and malignant diseases, providing valuable clinical information for establishing a definitive diagnosis.
A pleural biopsy is generally a minimally invasive procedure performed under local anesthesia. Based on imaging findings or physical examination, the physician identifies the appropriate site and obtains a small tissue sample from the pleura using specialized biopsy needles. The collected tissue is then sent to the pathology laboratory for analysis.
Closed needle pleural biopsy is one of the most commonly used techniques, particularly in cases of unexplained pleural effusion. During the procedure, sterile conditions are maintained, local anesthesia is administered, and the biopsy needle is advanced through the chest wall to obtain a tissue sample from the pleural membrane. The procedure is typically completed within a short period.
The clinical significance of pleural biopsy lies in its high diagnostic accuracy for conditions such as tuberculous pleuritis, mesothelioma, metastatic tumors, and various inflammatory pleural diseases. Pathological evaluation identifies the type of disease, allowing an appropriate treatment plan to be developed and improving overall patient management.
| What You Need to Know | Information |
| What is a pleural biopsy? | Pleural biopsy is a diagnostic procedure in which a tissue sample is taken from the pleura (the membrane surrounding the lungs). It is commonly performed to investigate the cause of pleural fluid, infection, cancer, or other diseases. |
| Purpose of the procedure | It is used to determine the source of pleural fluid, diagnose pleural thickening, tumors, tuberculosis, metastatic diseases, or mesothelioma. |
| Biopsy methods | It can be performed using three main methods: needle biopsy (tru-cut or fine needle), thoracoscopic biopsy (video-assisted thoracoscopic surgery – VATS), and open surgical (thoracotomy) biopsy. |
| Most commonly used method | Image-guided (ultrasound or CT-guided) tru-cut needle biopsy is the most frequently used technique and is performed under local anesthesia. |
| Thoracoscopic biopsy | In this method, performed under general anesthesia, a camera and surgical instruments are inserted into the chest cavity to directly examine the pleura and obtain biopsy samples. It provides larger tissue specimens. |
| Open surgical biopsy | This biopsy is performed through thoracotomy and is generally preferred when other methods fail to establish a diagnosis. |
| Procedure duration | Needle biopsy usually takes 15–30 minutes, while thoracoscopic and open surgical procedures require more time. |
| Preparation process | Blood-thinning medications may need to be discontinued, coagulation tests may be required, and fasting before the procedure may be necessary. The physician will provide the appropriate instructions. |
| Type of anesthesia | Local anesthesia is used for needle biopsy, whereas thoracoscopic and open surgical biopsies are performed under general anesthesia. |
| Risks and complications | Pneumothorax (collapsed lung), bleeding, infection, pain, and, rarely, persistent air leakage may occur. Patient monitoring after the procedure is required. |
| Post-procedure process | After the biopsy, a chest X-ray is performed to check for complications. A chest tube may be inserted if necessary. Pathology results are usually available within a few days. |
| Time to results | The collected samples are sent to the pathology laboratory, and results are generally available within 3–7 days. |
Which Symptoms Related to the Pleura Indicate the Need for a Pleural Biopsy?
The human body reflects internal problems through various warning signs. Excessive fluid accumulation between the pleural membranes or the development of mass-like pleural thickening can lead to symptoms that significantly affect a patient’s daily life. Fluid accumulation occupies valuable space within the chest cavity, preventing the lungs from expanding freely. As a result, the body’s tissues receive less oxygen, and patients experience resistance with every breath.
In addition, the outer layer of the pleura attached to the chest wall is extremely rich in pain-sensitive nerves. Any inflammation, stretching, or tumor growth in this region can cause severe pain. The primary symptoms that lead patients to seek medical attention and subsequently undergo a pleural biopsy include:
- Shortness of breath
- Chest pain
- Dry cough
- Fatigue
- Night sweats
- Loss of appetite
- Weight loss
- Fever
Initial evaluation of patients presenting with these symptoms usually includes a detailed physical examination and basic imaging studies. If fluid or abnormal tissue is detected between the pleural layers on a chest X-ray or computed tomography scan, further diagnostic procedures become necessary to establish a definitive diagnosis.
What Is Evaluated During Pleural Fluid Analysis Before a Pleural Biopsy?
When fluid is detected between the pleural membranes, the first step before performing an invasive tissue biopsy is usually to obtain a sample of the fluid itself. This procedure, known as thoracentesis, involves inserting a fine needle through the back to collect several syringes of pleural fluid for laboratory analysis. The composition of this fluid serves as an important indicator of the underlying disease.
Even the color, clarity, and consistency of the fluid provide valuable diagnostic clues. For example, a clear, straw-colored fluid generally suggests simple heart failure or protein deficiency, whereas bloody fluid may indicate trauma, benign asbestos-related conditions, or sometimes cellular abnormalities. Cloudy, purulent fluid strongly suggests empyema, meaning a severe pneumonia has spread to the pleural space. The chemical and cellular composition of the fluid is then analyzed carefully in the laboratory.
The main laboratory tests performed on pleural fluid include:
- Cell count
- Glucose
- Protein
- Lactate dehydrogenase
- Adenosine deaminase
- Cytology
- Culture
- pH
These laboratory findings clearly distinguish whether the pleural fluid results from a simple pressure imbalance (transudate) or from a disease directly affecting the pleura (exudate). If the fluid is identified as an exudate but does not contain sufficient diagnostic cells to establish a definitive diagnosis, obtaining tissue directly from the pleura through a pleural biopsy becomes necessary.
How Is a Closed Pleural Biopsy (Needle Biopsy) Performed Step by Step?
Closed pleural biopsy is a practical procedure commonly performed in outpatient or clinical settings, particularly in patients with a significant amount of free pleural fluid. The objective is to obtain small tissue samples from the pleura using specially designed biopsy needles without opening the chest cavity. For many years, specialized needles such as the Abrams or Cope needle, equipped with a notched cutting mechanism, have been safely used for this purpose.
The procedure begins with the patient sitting upright on an examination table or chair while leaning forward with the arms extended. This position widens the spaces between the ribs, facilitating needle insertion. Using ultrasound guidance or physical examination, the physician identifies the area with the greatest fluid accumulation. To ensure a painless procedure, local anesthetic is injected into the skin, subcutaneous tissues, and the highly sensitive pleural membrane. Once adequate anesthesia is achieved, a tiny skin incision only a few millimeters long is made. The biopsy needle is gently advanced through the upper border of the lower rib to avoid injury to the nerves and blood vessels. Once the needle enters the pleural cavity, its notched mechanism is positioned against the inner chest wall. The cutting mechanism is then activated, removing a tissue sample approximately the size of a grain of rice. To improve diagnostic accuracy, the needle direction is adjusted slightly, and three or four tissue samples are collected from different angles. This technique provides particularly high diagnostic accuracy in diseases such as tuberculosis, which diffusely involve the pleura.
What Are the Advantages of Image-Guided Pleural Biopsy Techniques?
With advances in medical technology, procedures once performed based solely on anatomical landmarks have increasingly been replaced by image-guided techniques. In pleural biopsy, ultrasonography and computed tomography are the primary imaging modalities that provide this visualization. Image-guided biopsies not only improve diagnostic accuracy but also significantly enhance patient safety.
Ultrasonography uses sound waves to generate a real-time image of the chest cavity without exposing the patient to radiation. During the examination, pleural fluid appears as a dark space, while thickened pleural tissue appears gray-white on the screen. Guided by these images, the physician accurately directs the biopsy needle into the center of the abnormal tissue. In addition, color Doppler ultrasonography identifies blood vessels running between the ribs, minimizing the risk of bleeding.
CT-guided pleural biopsy is generally preferred when no pleural fluid is present and only dry pleural thickening exists. CT imaging provides thin cross-sectional images that create a highly detailed three-dimensional map of the chest. In situations where the abnormal tissue lies close to vital structures such as the heart, major blood vessels, or diaphragm, CT guidance allows the physician to advance the needle millimeter by millimeter, safely obtaining an accurate tissue sample while avoiding injury to surrounding organs.
How Is Pleural Biopsy Performed Using VATS (Video-Assisted Thoracoscopic Surgery)?
When needle biopsy is insufficient, when disease is confined to a very small area of the pleura, or when definitive treatment is planned in addition to diagnosis, one of the most advanced techniques in thoracic surgery, Video-Assisted Thoracoscopic Surgery (VATS), is employed. Considered the gold standard for diagnosing pleural diseases, VATS is a minimally invasive surgical technique that enables surgeons to examine and treat the chest cavity using advanced camera systems without opening the chest.
The procedure is performed under general anesthesia in a fully equipped operating room. To provide adequate working space for the surgeon, anesthesiologists use a specialized double-lumen endotracheal tube that allows the lung on the surgical side to be completely deflated while the opposite lung continues to support the patient’s breathing. Collapsing the operative lung creates a spacious working cavity within the chest.
After positioning the patient on one side, one or two small incisions approximately one to two centimeters long are made between the ribs. Through these openings, slender cameras equipped with high-definition optics and powerful light sources are introduced into the chest cavity. The entire pleural cavity is displayed on large monitors in exceptional detail. The surgeon systematically examines the chest wall, diaphragm, lung surface, and pericardium before directly removing suspicious tissue, pleural thickening, or nodules using specialized surgical instruments. With this approach, the likelihood of missing disease or failing to establish a diagnosis is extremely low.
What Additional Procedures Can Be Performed During VATS Besides Pleural Biopsy?
The value of VATS extends beyond diagnosis because it also allows therapeutic interventions to be performed during the same procedure. While needle biopsy can obtain only a very small tissue sample, VATS provides the surgeon with comprehensive access to the thoracic cavity. Accumulated infected fluid can be completely drained, and adhesions between tissues can be carefully separated.
In some cases, diseased pleural tissue forms a thick, rigid layer around the lung, preventing normal expansion during breathing. This restrictive layer can be carefully removed using surgical instruments, allowing the lung to expand freely once again. In other situations, patients experience persistent recurrent pleural effusions. After obtaining biopsy samples, sterile medical powders or medications can be introduced between the pleural layers to create permanent adhesion, preventing future fluid accumulation.
Additional procedures that can be performed during VATS include:
- Fluid drainage
- Pleurodesis
- Decortication
- Lysis of adhesions
- Bleeding control
- Lung resection
- Pericardial window creation
After all procedures have been completed, a silicone chest tube is placed through one of the small incisions to drain any remaining fluid or air before the operation is safely concluded.
How Do Pulmonology and Thoracic Surgery Approaches to Pleural Biopsy Differ?
Pleural biopsy and thoracoscopic examination may be performed by two different medical specialties using different techniques and for different purposes. When performed by pulmonologists, the procedure is known as medical thoracoscopy, whereas thoracic surgeons perform surgical thoracoscopy, commonly referred to as VATS.
Medical thoracoscopy is usually performed without general anesthesia. Patients receive sedative medications while the procedural area is numbed with local anesthesia. Through a single small incision, pleural fluid is drained and simple biopsy samples are collected from abnormal pleural tissue. The procedure is relatively short and does not require a fully equipped operating room.
In contrast, surgical thoracoscopy (VATS) is a much more comprehensive surgical procedure. General anesthesia and single-lung ventilation provide the surgeon with exceptional maneuverability inside the chest cavity. Beyond obtaining superficial biopsy specimens, surgeons can control bleeding, remove deep-seated lung masses, and release extensive adhesions using specialized surgical instruments. In summary, medical thoracoscopy is mainly used for straightforward diagnostic procedures, whereas surgical thoracoscopy is the preferred option for the most complex diagnostic and therapeutic interventions.
Why Is Open Pleural Biopsy (Thoracotomy) Rarely Performed Today?
Before the development of minimally invasive camera systems, the only way to access the chest cavity was through open surgery, known as thoracotomy. This procedure involves making a large 15–20 cm incision in the side or back of the chest, separating the ribs with specialized retractors, and allowing the surgeon direct access to the thoracic cavity.
However, as medicine has rapidly advanced toward minimally invasive approaches, the need for open pleural biopsy has become extremely uncommon. Open surgery causes considerable postoperative pain due to extensive muscle division and rib retraction. Hospital stays are longer, and recovery to normal daily activities may require several weeks.
Today, open thoracotomy is reserved only for highly selected situations. For example, patients with severe previous pneumonia or tuberculosis may develop dense pleural adhesions that completely eliminate the working space needed for thoracoscopic surgery. Similarly, if a patient cannot tolerate single-lung ventilation because of severe heart or lung disease, an open approach may be required. Outside these exceptional circumstances, minimally invasive techniques remain the preferred option.
What Are the Potential Risks Associated with Pleural Biopsy?
Thanks to modern medical equipment, advanced imaging technologies, and increasing surgical experience, pleural biopsy is generally considered a very safe procedure. Nevertheless, any intervention that breaches the skin and involves internal organs carries certain inherent risks and potential complications. Understanding these risks, taking appropriate preventive measures, and managing complications effectively are essential aspects of patient care.
The primary risks associated with pleural biopsy include:
- Pneumothorax
- Hemothorax
- Infection
- Pain
- Vasovagal reaction
- Organ injury
Pneumothorax occurs when the biopsy needle accidentally punctures the lung or allows air to enter the pleural cavity, resulting in partial lung collapse. This complication occurs in only a small percentage of patients and often resolves spontaneously. Rarely, placement of a small chest tube is necessary. Hemothorax results from injury to blood vessels running beneath the ribs, causing bleeding into the pleural space. This risk is increased in patients taking anticoagulant medications, making appropriate adjustment of these medications before biopsy essential. Vasovagal reactions, characterized by low blood pressure, sweating, and faintness due to pain or anxiety, can largely be prevented through adequate patient education and effective local anesthesia.
How Is Recovery Managed After a Pleural Biopsy?
The recovery process following pleural biopsy depends on the technique used. After a simple outpatient needle biopsy, patients are generally observed in the hospital for several hours. During this period, blood pressure and pulse are monitored, and a chest X-ray is obtained to rule out air leakage. If no complications are detected, patients are usually discharged home the same day.
When the biopsy is performed using VATS under general anesthesia, postoperative care is more comprehensive. Upon awakening, patients usually have a silicone chest tube in place to safely drain residual air and fluid from the pleural cavity.
The key aspects of postoperative care include:
- Early mobilization
- Pain management
- Chest tube monitoring
- Deep breathing exercises
- Regular walking
- Adequate fluid intake
- Nutritional support
Early mobilization is one of the fundamental principles of postoperative care. Within hours of surgery, patients are assisted in getting out of bed and encouraged to walk. Early ambulation promotes bowel function, reduces the risk of blood clots, and facilitates full lung expansion. Modern pain management techniques, including patient-controlled intravenous analgesia and long-acting local anesthetics administered during surgery, allow patients to recover comfortably. Once chest tube drainage decreases and the fluid becomes clear, the tube is removed painlessly, and the patient is discharged.
Why Are Breathing Exercises Essential After a Pleural Biopsy?
Whether a patient undergoes a simple needle biopsy or minimally invasive thoracic surgery, restoring normal lung expansion is one of the most important goals during recovery. The lungs contain millions of tiny air sacs. Due to temporary lung collapse during surgery, compression from pleural fluid, or mild postoperative discomfort, patients often begin taking shallow breaths without realizing it. Shallow breathing may lead to collapse of these air sacs (atelectasis) and accumulation of mucus, increasing the risk of pneumonia.
One of the most effective methods for preventing these complications is the use of an incentive spirometer, commonly known as a “Triflo” device, which contains three colored balls. Patients sit upright, fully exhale, then place the mouthpiece between their lips and slowly inhale as though drinking through a thick straw. The objective is not to blow into the device but to inhale deeply enough to raise the colored balls and keep them suspended for as long as possible. This deep inhalation expands collapsed air sacs and fills the lungs with oxygen. Patients are also encouraged to support their chest with a pillow while coughing forcefully after each exercise session to clear secretions and significantly accelerate recovery.
How Do Pleural Biopsy Results Determine the Course of Treatment?
The small tissue samples obtained during pleural biopsy are immediately preserved in special solutions and sent to the pathology laboratory. There, they are processed into microscopic sections, stained with specialized dyes, and carefully examined by expert pathologists. The arrangement, appearance, and structural characteristics of the cells provide the definitive diagnosis that explains the patient’s underlying disease. Pathology results are usually available within several days to one week. Although waiting for these results can be stressful for patients, they are critical for determining the appropriate treatment strategy.
If the pathology report identifies a benign inflammatory condition or tuberculosis, patients are referred to the appropriate specialists and begin long-term medical treatment, usually without requiring surgery. However, if the report confirms mesothelioma or metastatic malignant cells involving the pleura, the treatment strategy changes completely. Multidisciplinary teams including medical oncologists, thoracic surgeons, and radiation oncologists evaluate the patient’s condition. Early-stage disease may be managed with more extensive surgical resection, whereas advanced disease often requires chemotherapy, targeted therapies, or other systemic treatments.
Frequently Asked Questions
Prof. Dr. Alper Fındıkcıoğlu graduated from Istanbul University Faculty of Medicine and completed his thoracic surgery residency at Dr. Siyami Ersek Hospital. He began his academic career at Başkent University in 2005; he received the title of associate professor in 2014 and professor in 2022. He has extensive experience in lung cancer, chest wall diseases, and minimally invasive surgery. Since 2024, he has been continuing his professional work at Acıbadem Hospital.
