Conclusions: Non- O blood type was independently associated with risk of VTE, and added to the risk associated with FV Leiden.

Conclusions: Our findings suggest an association between O blood type and pancreatic manifestation of disease in patients with VHL syndrome, especially for PNETs.

More importantly, there was a significant association of O blood type with solid pancreatic lesions consistent with PNETs (P = 0.0084).

Results: We found a strong trend for association between O blood type and pancreatic disease manifestation in patients with VHL syndrome (P = 0.047).