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.
Element Osmium-Os. Comprehensive data on the chemical element Osmium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Osmium.Common chemical compounds are also provided for many elements.omprehensive data on the chemical element Osmium is provided on this page; including scores of properties, element names in many languages, most known nuclides of Osmium.