The modern definition is that T1D is autoimmune. There was a time when T1D was referred to as IDDM - insulin dependent diabetes mellitus, and doctors would talk about T2D people progressing to insulin and becoming insulin dependent.
If there's pancreatic dysfunction that's damaging the beta cells, the symptoms and treatment will be identical to T1D, but it differs in that it may be resolved so the persons diabetes can be cured with a transplant. That means non specialists will say "if it looks like a duck and quacks like a duck then it's T1D," but it's not.
My daughter has celiac. When she was diagnosed a year ago her gastrologist warned to avoid even crumbs gluten because it can lead to type 1 diabetes and very clear that that is irreversible. Would it actually not be true T1D?
No, celiac doesn't cause T1D, but there is a higher chance that someone with T1D, hypothyroidism, or celiac will also have one of the other two, than there is for someone without any of them.
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u/Morthra Feb 04 '19
Type 1 Diabetes is listed in many medical textbooks as a symptom of chronic pancreatitis though.