News-October 14, 2015; 2:47 PM ET. Progressively colder air will lead to the first snowflakes and snowfall of the season, as well as the first freeze in parts of the Great Lakes, Northeast and neighboring Canada this weekend.ews-October 14, 2015; 2:47 PM ET. Progressively colder air will lead to the first snowflakes and snowfall of the season, as well as the first freeze in parts of the Great Lakes, Northeast and neighboring Canada this weekend.
It is important to note that a test that is positive for CEA may not always be indicative of cancers. It is due to this reason that this test is not used to screen for cancers. The CEA blood test normal range is from 0 to 2.5 micrograms per liter.
For example, if CEA is detected in cerebrospinal fluid, this may indicate a central nervous system metastasis. Since not all cancers produce CEA, it is possible to have cancer but also have a normal CEA. If a cancer does not produce CEA, then the test will not be useful as a monitoring tool.