There have been reported associations reported between diabetes and pancreatic cancer. However there is no simple answer to the question of whether pancreatic cancer causes diabetes, or vice versa, and the relationship is likely very complex.
There is also clear association between polycystic ovarian syndrome (PCOS) and diabetes/insulin resistance. Addressing and preventing diabetes is a key management principle for patients with PCOS.
Patients with diabetes seem to have a higher prevalence of thyroid disorders compared to the general population. Unfortunately treatment for diabetes will not address thyroid disorders, and treatment of thyroid disorders will not treat diabetes. So even though there are associations between diabetes and pancreatic cancer, and diabetes and hypothyroidism, they do need to be treated in their own ways.