The specimen is prepared in the laboratory and examined under the microscope for the presence of abnormal cells. Rinse your mouth with water to avoid contamination by particles from the mouth. Cough deeply from the lungs after taking several deep breaths. One teaspoon of sputum is needed for the test. 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.
Abnormal results indicate a malignancy of the respiratory tract.
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