I love this sentence without an article, because it does sound like something only a nonchalant Russian mafia member dealing in black market stolen organs would ever say. "хэло, дыс ыс элбо."
haha, I like it :P.
It might be one of those really lame Marvel superhero mutants whose superpower is having big elbows or something.
I tried "Hello, your elbow" I was trying to think how anyone would say this, and imagined a packed train, and someone's elbow was digging into my side.
What if elbow is a proper noun "hello, this is elbow, and this is arm and this is tongue. Nice to meet you"
Hello, this is elbow speaking. May I please speak to hand? Oh, hello hand! How are you? Its been such a long time!
Not sure what the context was supposed to be, but it should say, "Hello, this is my/your/his/an elbow."