Small cell pancreas cancer - General prognosis seems to be poor. Has anyone been in a similar situation? Can my dad beat this?

Hi all, 

My dad has recently been diagnosed with small cell pancreas cancer. They don't know whether its spread to the lymph nodes  but it hasn't spread to any other organs yet..but at the last scan in feb showed it was under 2cms. I know this type of cancer is really really aggressive and my dad is very positive and currently a little bit in denial. He will start chemo in 2 weeks and we are trying to be optimistic. When i look at the prognosis, it is poor and they say that it can be months only in some cases.Does anyone have any experience in a similar situation and what the outlook might be for him. Can he beat this, is there a chance he might be ok if the chemo is successful? i cant seem to find any information . I want to be realistic and want to know what we are facing, so we can prepare ourselves and help dad face it too.

Thanks for any guidance or advice