A mysterious and a bit coarse photo of a man's blood clot is receiving much attention after the New England Journal of Medicine he shared on Twitter.

The clot was spat by a 36-year-old man suffering from chronic heart failure, according to the medical journal peer-reviewed . He died shortly thereafter. What is so bizarre about the clot is that it is a cast of its right bronchial tree – which does not really happen. It would have been more understandable if the clot had come out in parts, but the fact that it was so complete is surprising, Georg Wieselthaler, a transplant and pulmonary surgeon at the University of California in San Francisco, has declared to the Atlantic.

"It's a curiosity you can not imagine – I mean, this is very, very, very rare," he told The Atlantic.

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C & # 39; was a case of a 25-year-old pregnant woman who coughed a small cast of her bronchial tree, and later continued to recover and give birth to a healthy baby, according to a 2005 report in the Journal of Cardio-Thoracic Surgery. A 34-year-old woman was cited in 1926 while coughing with a jet of trachea, both bronchi and several bronchioles, according to a study by The Journal of America Medical Association. He died a day later.

In the case of this man, he died of complications of heart failure a week after the doctors tried to stop the bleeding and opened the airways with a breathing tube.

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