Lymphangiogram
Alternative names:
lymphangiography; lymphography
How the test is performed:
The test is performed in a hospital radiology department or in the health care provider's office by an X-ray technician. You may be offered a sedative to help relax. You will be put in a specially constructed chair or on the X-ray table. The skin of each foot is cleansed and a small amount of blue dye is injected between the toes into the webbing. Within 15 minutes, thin, bluish lines appear on the top of the foot. This identifies the lymphatic vessels. Then a local anesthetic is given and a small incision is made into one of the larger blue lines. A needle or catheter (a thin flexible tube) is inserted into a vessel in each foot, and a contrast medium is injected into each foot at a very slow rate (60 to 90 minutes for all the contrast medium to be injected). A fluoroscope (a special X-ray that projects the images on a TV monitor) is used to monitor the progress of the dye as it spreads through the lymph system up the legs, into the groin, and along the back of the abdominal cavity. Once the contrast medium is injected, the catheter is removed and the incisions are stitched and bandaged. X-rays are taken of the legs, pelvis, abdomen, and chest areas. The next day, another set of X-rays is taken.
How to prepare for the test:
Inform the health care provider if you are pregnant, and if you have bleeding problems. Allergic reactions to X-ray contrast material or any iodine substance should be mentioned. You must sign a consent form. You may be asked to restrict your diet to clear liquids for a period of time before the test. You may wish to empty your bladder just before the test.
Infants and children:
The physical and psychological preparation you can provide for this or any test or procedure depends on your child's age, interests, previous experience, and level of trust. For specific information regarding how you can prepare your child, see the following topics as they correspond to your child's age:
How the test will feel:
There will be a brief sting from the needle and blue dye injected between the toes. There is another brief sting with the injection of the local anesthetic. There may be a feeling of pressure as the contrast medium is injected, and there may be some discomfort behind the knees and in the groin area.
The incisions will be sore for a few days. The blue dye will color the urine and stool for about 48 hours. The skin and possibly the vision will take on a bluish cast temporarily.
Why the test is performed:
The test is used to evaluate the possible spread of cancers and the effectiveness of cancer therapy. The X-rays may also help determine the cause of swelling in an arm or leg and check for parasitic (organisms that live on another) diseases.
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