In addition to a large skin graft covering part of the sergeant’s abdomen, penis and scrotum, surgeons connected three arteries, four veins and two nerves to provide blood flow and sensation to the donated tissue. His internal organs were not damaged by the blast.

The sergeant did not receive testicles from his donor to avoid the ethical issues that might ensue if he later had children, said Damon Cooney, another transplant team member. The testicles would have contained sperm from the recently deceased donor.