I read about a baby in Russia who was born with diphallia. He had two penises but was missing a bladder. The doctors operated on him and reconstructed a bladder and joined the penises to form one.
Apparently, the baby is healthy and will be able to function normally when he grows up. He's not going to have fertility issues.
I'm glad to hear this because aside from the health issues, I'm sure this child would have experienced psychological disturbance from this condition had he not been operated on.