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 features observable on the inside of the bladder are the ureter orifices, the trigone, and the internal orifice of the urethra. The trigone (also known as the trigonum vesicae and as the trigone vesical)** is a smooth triangular region between the openings of the two ureters and the urethra.he bladder expels urine into a tube called the urethra that leads to the exterior of the body. Elimination of urine occurs by a process called micturition-which is also known as urination.