Is therapeutic thoracentesis safe in an elderly cachectic man with severe COPD, bronchiectasis, pseudomonal pneumonia, borderline low fibrinogen, undetectable haptoglobin, negative direct Coombs test, chronic thrombocytopenia, and unknown INR?

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An elderly cachectic patient with chronic obstructive pulmonary disease and bronchiectasis who has a new pseudomonal pneumonia and recent thoracentesis now has an elevated International Normalized Ratio, low fibrinogen, undetectable haptoglobin, a negative Coombs test, and chronic thrombocytopenia of 66 ×10⁹/L; what is the most likely diagnosis and appropriate initial management?

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