Cytology of Induced Sputum (for Lung Pathology Evaluation)

Why This Test Is Done

Your doctor may recommend this test if you have symptoms like chronic cough, blood in sputum, shortness of breath, or a history of lung diseases (e.g., chronic obstructive pulmonary disease, tuberculosis, or cancer). It’s also used in screening for early lung cancer in high-risk individuals or after exposure to known lung carcinogens.

How the Test Is Collected

You’ll cough up sputum (mucus from your lungs) into a sterile container. If coughing isn’t enough, you may use a saline rinse or a special pill to stimulate sputum production. The sample is then sent to a lab for microscopic examination.

What to Expect During the Test

The procedure is quick and painless. You’ll likely be asked to cough deeply into a container, or you may receive an oral rinse. No special preparation is needed, but avoid smoking or using cough suppressants before the test.

What the Results Mean

Results can show normal lung cells, signs of infection (e.g., bacteria, viruses), inflammation, or abnormal cells that may indicate precancerous changes or cancer. Your doctor will interpret the findings in the context of your symptoms and medical history.