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Chylothorax — SCE Acute Medicine MCQ

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EasyAcute Respiratory PresentationsChylothoraxSCE Acute Medicine

A 55-year-old man presents with acute breathlessness with chest symptoms. Relevant history includes respiratory disease and a relevant acute precipitant. On assessment, respiratory distress is present with abnormal oxygenation. Investigations show milky pleural fluid with high triglycerides after thoracic surgery. What is the most likely diagnosis?

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Correct answer: C — Chylothorax

The key discriminator is that milky pleural fluid with high triglycerides after thoracic surgery, which makes Chylothorax the single best answer. Acute pancreatitis is less appropriate because it does not address the dominant acute risk in the vignette; Toxic drug ingestion would fit a different presentation or later stage of care. Acute coronary syndrome and Diabetic ketoacidosis are suboptimal because they would either delay time-critical treatment or follow the wrong acute pathway. Teaching point: SCE-style acute medicine questions usually test prioritisation using physiology, timing and a guideline-defined threshold, rather than isolated factual recall.

Reference: BTS Pleural Disease Guideline