We are fans of Liverpool Victoria.
My OH has a thyroid condition which is under control with medication, she also had breast cancer surgery in 2010, also thankfully under control.
Both conditions were mentioned to LV! And we were quoted prices for travel insurance with and without the prevailing conditions.
As both are controllable we opted for the without, premium for multi travel, worldwide, excluding USA and Canada, £139. We are both in our 60's, me sadly, only just!
Hope this helps.