Is this scientifically/medically possible? My mind is blown, if yes.

A fir tree has been found growing inside a man’s lung by surgeons who were operating on him for suspected cancer.

The tree, measuring 5cm, was discovered by Russian doctors when they opened up Artyom Sidorkin, 28, to remove what they thought was a tumour.

Medical staff believe that Mr Sidorkin somehow inhaled a seed, which later sprouted into a small fir tree inside his lung.

The patient had complained of extreme pain in his chest and had been coughing up blood. Doctors were convinced he had cancer. (Link)