Confusing letter

Ive got a copy of a letter that was sent to my GP from my Diabetic consultant and I,m very confused ...

He tested my GAD and this is the results and some of the things that have been said in the letter, GAD, islet cell and IA-2 antibodies all negative.

Then (I,ll limit the exact wording) This maybe because he was diagnosed 43 year ago and is possible I may have anitibody negative Diabetes.
Then some history of type 2 in the family Dad and his Sister late on in life) and it mabe a monogenic form of Diabetes

He wants to review the circumstances surrounding my initial diagnosis and and lastly mentions that wether or not it might be useful to see if I have any residual beta-cell function.

I have not got a clue what this all means so I,m going to do a google search but if any of you have any insight to what all this means please post a reply

Thanks for that tim2000s

been on insulin for 43 years

its really alot to take in after so long as type 1, which I still maybe but seems unlikely. I know without a doubt I have no insulin production by my levels, I have had all the classics, thyroid, carpel tunnel, trigger finger, that thing when a tendon snaps in a finger, also a hip replaced and a fibular bone graft in the other hip and the list can go on. I see the consultant on the 23rd regarding a pump so may or may not find out more then and thankyou all for the replies

hmmm Ive just found the first letter I got with the test results on and this is from the same blood test that the opening post is about, anyway here what he originally said

Bloods from 20th July 2015 - GAD antibodies = 6.3 IU/ml , islet cell antibody negative, IA-2 awaited

So the GAD result showed a reading then he says it was negative, I will take both these letters to the Hospital when I see him regarding the pump at the end of the month.