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 trigone is a smooth triangular region of the internal urinary  bladder formed by the two ureteral orifices and the internal  urethral orifice. The area is very sensitive â¦ to expansion and once  stretched to a certain degree, the urinary bladder signals the  brain of its need to empty.he trigone is a smooth triangular region of the internal urinary  bladder formed by the two ureteral orifices and the internal  urethral orifice. The area is very sensitive â¦ to expansion and once  stretched to a certain degree, the urinary bladder signals the  brain of its need to empty.