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.
What is operating system on PC? An operating system (OS) is an interface between hardware and user which is responsible for the management and coordination of activities and the sharing of the resources of aâ¦ computer, that acts as a host for computing applications run on the machine.