A blood clot formed in the exact shape of a man's lung passage - then he coughed it up

The patient had come in for heart failure, and physicians at the University of California at San Francisco had an aggressive plan to help.

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University of California, San Francisco: Lung Shaped Blood Clot Formed In Exact Shape Of A Lung Passage. Man Coughed It Out

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Medical rarity: Man coughs up blood clot exact size of lung passage

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