What is the liver and thyroid tumours likelihood in humans?

Both not uncommon. Thyroid tumors are unique in that in spite of the excessive blood supply to the gland, metastasis is essentially never found. Stimulation from pituitary can produce glandular adenomas and conversion to Ca. The liver is not a common site of primary disease such as hepatoma from Hep B and C. Rather many of the tumors are metastatic due from colon, lung, breast.