Roomies, does size really matter? According to reports, a healthy 30-year-old man in Sweden died while undergoing penis enlargement surgery.

Plastic surgeons had completed a procedure to make the man’s penis longer and were about to inject fat cells from his belly to enlarge it when he suddenly died of a heart attack.

The autopsy of the patient revealed that he died of a lung embolism. The forensic team found that fat loosened during the first procedure leaked into his veins traveled to his lungs and ruptured blood vessels there. Now they’re warning surgeons about the risk of combining the two procedures.

This is apparently the first reported death of this type of surgery in Sweden. But urologist Tobias Kohler told Buzzfeed News it could lead to other serious problems like disfigurement, permanent erectile dysfunction or worse.