CEA test: Carcinoembryonic antigen test is to detect response to therapy in cancer patients, especially colon cancer, with normal range of less than 2.5 (less than 5 in heavy smokers). Note that a positive test may not always be indicative of cancer.
Os Trigonum Syndrome. An Os Trigonum is a small, extra bone found at the back of the ankle in approximately 5-10% of people. Often it goes completely unnoticed, not causing any problems.
The triskle (triskele, triskelion, trisquele or tryfot) is a Celtic symbol that represents the life main triads in eternal movement and balance, like birth, life and death, body, mind and soul or sky, sea and earth. It is a kind of a three points star, usually curved, giving grace, movement and fluidity to the image.