© 2005-2012 American Society of Clinical Oncology (ASCO). All rights reserved worldwide.
Doctors use many tests to diagnose cancer and find out if it has metastasized (spread). Some tests may also determine which treatments may be the most effective. For most types of cancer, a biopsy is the only way to make a definitive diagnosis of cancer. If a biopsy is not possible, the doctor may suggest other tests that will help make a diagnosis. Imaging tests may be used to find out whether the cancer has metastasized. Your doctor may consider these factors when choosing a diagnostic test:
- Age and medical condition
- Type of cancer suspected
- Severity of symptoms
- Previous test results
In addition to a physical examination, the following tests may be used to diagnose ASPS or cardiac sarcoma:
Biopsy. A biopsy is the removal of a small amount of tissue for examination under a microscope. Other tests can suggest that cancer is present, but only a biopsy can make a definite diagnosis. The sample removed from the biopsy is analyzed by a pathologist (a doctor who specializes in interpreting laboratory tests and evaluating cells, tissues, and organs to diagnose disease). A biopsy is the most definitive test for diagnosing sarcoma.
X-ray. An x-ray is a way to create a picture of the structures inside of the body using a small amount of radiation.
Computed tomography (CT or CAT) scan. A CT scan creates a three-dimensional picture of the inside of the body with an x-ray machine. A computer then combines these images into a detailed, cross-sectional view that shows any abnormalities or tumors. CT scans can also be used to guide a needle biopsy, in which a fine needle is inserted into the suspicious area and a sample of cells is gathered for microscopic examination. Sometimes, a contrast medium (a special dye) is injected into a patient's vein to provide better detail.
Magnetic resonance imaging (MRI). An MRI uses magnetic fields, not x-rays, to produce detailed images of the body. A contrast medium (a special dye) may be injected into a patient's vein to create a clearer picture.
In addition, the following tests may be used to diagnose ASPS:
Bone scan. A bone scan uses a radioactive tracer to look at the inside of the bones. The tracer is injected into a patient's vein. It collects in areas of the bone and is detected by a special camera. Healthy bone appears gray to the camera, and areas of injury, such as those caused by cancer, appear dark.
Blood tests. A complete blood count (CBC) may be done to measure the different types of blood cells.
In addition, the following tests may be used to diagnose cardiac sarcoma:
Heart evaluation. A heart evaluation, including an electrocardiogram (EKG or ECG) and an echocardiogram (ECHO), will look for structural abnormalities of the organ and motion of the walls of the heart.
Coronary arteriogram. An x-ray is taken after a dye is injected into an artery. This test highlights any abnormalities of the arteries.
Learn more about what to expect when having common tests, procedures, and scans.
After these diagnostic tests are done, your doctor will review all of the results with you. If the diagnosis is cancer, these results also help the doctor describe the cancer; this is called staging. Learn more about the first steps to take after a diagnosis of cancer.