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HardRespiratory MedicinePleural Effusion (Light's Criteria)mrcp part 1ukmlapane

A 64-year-old woman presents with progressive breathlessness. Chest X-ray reveals a moderate-sized right pleural effusion. A diagnostic pleural aspiration is performed. Biochemistry shows: Pleural protein 40 g/L, Serum protein 70 g/L. Pleural LDH 200 U/L (Serum LDH upper limit of normal 250 U/L). How should this effusion be classified according to Light's criteria?

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