发布时间:2017-03-13来源:The LAM Foundation
High Resolution CT Scan (HRCT) – Provides a detailed (2D) image of the inside of the lungs and chest. This is the most accurate and non-invasive test for diagnosing LAM. Abdominal CT scans are also used to find benign kidney tumors (called angiomyolipomas), which are present in about 40% of LAM patients.
VEGF-D Blood Test – Diagnostic blood test used in conjunction with a HRCT to distinguish LAM from other cystic lung diseases. In some cases, an elevated VEGF-D level can replace a biopsy to confirm diagnosis. This test may also be used on women with tuberous sclerosis to screen for LAM.
Lung Biopsy – Removing small samples of lung tissue which can be examined under a microscope to look for abnormalities that may indicate a LAM diagnosis. Lung tissue can be removed in several ways:
Chest X-Ray – A picture is taken of the heart, lungs and surrounding tissue which is usually used to show a collapsed lung or fluid build-up in the chest cavity. However, in LAM chest x-rays can be normal and should not be used as the sole means of making the diagnosis.
Pulmonary Function Test (PFT) – Measures how well the lungs are working by measuring the amount (volume) of air inhaled or exhaled and how much time each breath takes (flow rates). The patient breathes through a mouthpiece into a machine called a spirometer. The spirometer records the movement of air into and out of the lungs. Although these tests are used to determine the effect LAM has on lung function, they are not typically used for diagnosis.
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