Surgeons in Russia thought they were going to remove a cancerous tumor from a 28-year-old patient – but instead they found a 5-centimeter tree growing inside his lung.
It happened in Russia’s Urals region while doctors were operating on Artyom Sidorkin, the Russian newspaper, Komsomolskaya Pravda Daily reported Monday.
Doctors suspected Sidorkin had cancer after he complained of extreme pain in his chest and had been coughing up blood.
"I blinked three times and thought I was seeing things," Surgeon Vladimir Kamashev told the newspaper.
Doctors believe Sidorkin somehow inhaled a seed, which later sprouted inside his lung.
The spruce, which was touching the man's capillaries and causing severe pain, was removed.