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Malignant pleural effusion — pleurodesis and indwelling pleural catheter
In a symptomatic malignant effusion one starts with therapeutic aspiration to check whether breathlessness improves and the lung re-expands; if the lung re-expands one may choose talc pleurodesis or an indwelling pleural catheter (IPC) by patient preference, and if the lung is trapped — IPC only.
Why it matters in the exam
A malignant effusion indicates disseminated disease, and the goal is symptom relief, not cure. Common causes are lung cancer, breast cancer, lymphoma and mesothelioma. Cytology on the first sample is positive in about 60% of cases, so a repeat sample or pleural biopsy (thoracoscopic or image-guided) is sometimes needed. The first therapeutic aspiration is also a test: if breathlessness does not improve — there is probably another cause; and if the lung does not re-expand after aspiration — there is a "trapped lung" (non-expandable lung), and pleurodesis will not succeed because the two pleural layers do not meet. An asymptomatic patient needs no invasive treatment.
When the lung re-expands there are two options with equal effect on breathlessness: talc pleurodesis — through a drain (slurry) or during thoracoscopy (poudrage) — or an indwelling pleural catheter that the patient drains at home. IPC shortens hospital stay and reduces the need for repeat intervention, and with daily drainage it also frequently leads to "spontaneous" pleurodesis and allows catheter removal; its complications are infection, blockage and tumour tracking along the tract. Talc is used at a dose of 4–5 grams, and large-particle talc is preferred to reduce the risk of ARDS. The LENT score (fluid LDH, ECOG performance status, neutrophil-to-lymphocyte ratio and tumour type) estimates life expectancy and helps choose treatment. In a patient with a very short life expectancy repeated aspirations may suffice.
For all patients it is advisable to involve the oncology and palliative teams in the decision, and to match the choice to the patient's wishes and condition. An effusion that recurs quickly after aspiration indicates the need for a definitive solution rather than repeated aspirations.
Key points
- The first therapeutic aspiration guides the choice.
- Expanding lung — talc or IPC.
- Trapped lung — IPC.
- Talc 4–5 grams, large particles.
- LENT estimates life expectancy.
Summary table
| Situation | Choice | Note |
|---|---|---|
| No symptoms | Observation | No routine aspiration needed |
| Symptoms and an expanding lung | Talc (slurry or poudrage) or IPC | By patient preference |
| Trapped lung | IPC | Pleurodesis will not succeed |
| Very short life expectancy | Repeated aspirations | Avoid a long admission |
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Sources
- BTS Guideline for Pleural Disease, 2023 — Malignant pleural effusion
- ERS/EACTS statement on the management of malignant pleural effusions, 2018 — Recommendations
- ATS/STS/STR clinical practice guideline: Management of malignant pleural effusions, 2018 — Recommendations
Sources are given for further reading; the text is written afresh and not copied from them.
Reviewed by the Examqo AI Professor · 2026-11-06. The text may contain errors; when in doubt, check the source.