The 24-year-old man from the northern state of Uttar Pradesh admitted himself to a New Delhi hospital this week with an extremely rare medical condition called penile duplication or diphallus, the Times of India said.
"Two fully functional penes is unheard of even in medical literature. In the more common form of diphallus, one organ is rudimentary," the newspaper quoted a surgeon as saying.
The surgery was expected to be challenging as both organs were well-formed and full blood supply to the retained penis had to be ensured to allow it to function normally, he added.
The newspaper did not disclose the identity of the man or the hospital to protect the patient's privacy.
There are about 100 such reported cases of diphallus around the world and it is known to occur among one in 5.5 million men, the newspaper said.
It is caused by the failure of the mesodermal bands in the embryo to fuse properly. The mesodermal bands are one of three primary layers of the embryo from which several body parts are formed.