Surgical options

Hi all,

I have been diagnosed with invasive breast cancer and I have my first meeting with the surgeon on Thursday. I know to expect surgery soon but dont know if this will be lumpectomy or mastectomy. I know that this will be one of the things to discuss on Thursday but I am curious if there is a 'choice' - in a sense part of me just wants to be told which option but I wondered if anyone here made a decision one way or the other and how they felt about that?  How long do you get to make any decisions if a choice is available? 
Am also put this query in the recently diagnosed thread as I have not posted before and not sure which is better for this. 
Thanks for any thoughts.