Tenderness and hard lump under nipple

Hey all, i went to dr few days ago and told him i felt a lump under my nipple he said it sounds like just excess tissue but he will have a look, he checked my right one and said it was fine then ran he's hand down my left one and was almost shocked, said something like 'oh god that is a hard lump', then kind of changed he's mind about the tissue idea. 

 

Said he will need me to go to a clinic to get some checks doing, he told me when i get there don't be startled as it will all be women.so I'm guessing its a breast cancer clinic, Im just waiting for a phone call but just wanted some piece of mind has anyone experienced this as a male, i know its very rare in men alot of people have told me but its got to happen to someone i guess.

 

Many thanks in advance. :)