Why do I need a calcitonin test?You may need this test if you:Are being treated for medullary thyroid cancer. The test can show whether the treatment is working.Have completed treatment to see whether the cancer has come back.Have a family history of MEN 2.You may also need this test if you have not been diagnosed with cancer, but have symptoms of thyroid disease. These include:A lump in the front of your neckSwollen lymph nodes in your neckPain in your throat and/or neckTrouble swallowingChange to your voice, such as hoarseness
