A positive tTG with a negative gliadin can mean a number of things: You got a false positive tTG. (Possibly due to some other autoimmune disorder) You got a false negative gliadin. (This is actually much more likely than with the tTG test. Reported sensitivity of gliadin test is in the 65-75% range, meaning that roughly 1/4-1/3 will be false negative)
Definition of ultra. : going beyond others or beyond due limit : extreme.
Ultra Vires. [Latin, Beyond the powers.] The doctrine in the law of corporations that holds that if a corporation enters into a contract that is beyond the scope of its corporate powers, the contract is illegal. The doctrine of ultra vires played an important role in the development of corporate powers. Though largely obsolete in modern private corporation law, the doctrine remains in full force for government entities. An ultra vires act is one beyond the purposes or powers of a corporation. The earliest legal view was that such acts were void. Under this approach a corporation was formed only for limited purposes and could do only what it was authorized to do in its corporate charter. This early view proved unworkable and unfair.