They were treating a 36-year-old man with end-stage heart failure when he began coughing so violently, that he coughed up a 6-inch-wide blood clot from his lungs in the near-perfect shape of his right bronchial tree.
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The bright mass that looks like coral is a blood clot.
The doctors were shocked, calling what happened extremely rare.
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Despite doctors' best efforts, the man passed away a few days later.
The information in this article was provided by the New England Journal of Medicine.