I didn’t know you even could. This is a gross story, don’t look below the fold if you’re at all sensitive.
The NEJM reports that a 36 year old patient with a whole series of severe cardiovascular problems did something strikingly bizarre and ultimately tragic.
During an extreme bout of coughing, the patient spontaneously expectorated an intact cast of the right bronchial tree. The right bronchial tree consists of three segmental branches in the upper lobe (blue arrows), two segmental branches in the middle lobe (white arrows), and five segmental branches in the lower lobe (black arrows).
There is a photo at the link. The patient died of heart failure a bit more than a week later.