SudaMediCa, The Sudanese Medical Community

Dear colleeuges, Greetings
Here is my new question for you which I'll post its answer a week later, please choose your answer and don't add any explanation during the period of voting to allow other users to choose their own without guidence, I think this will be more useful for a larger number of user and that is the aim to test our selves, Or what do you think?
Yours: Dr.Altayeb

It's true, Ret-Oncogen is associated with Medullary thyroid cancer ,Most of you get it right so congratulations