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Related Experiment Videos

Carcinoembryonic antigen in sputum

Y Tanno, K Nishioka, T Takishima

    The Tohoku Journal of Experimental Medicine
    |May 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Measuring carcinoembryonic antigen (CEA) in sputum can help diagnose lung cancer. Elevated CEA levels in sputum were significantly higher in lung cancer patients compared to those with non-malignant lung diseases.

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    Area of Science:

    • Oncology
    • Pulmonology
    • Biochemistry

    Background:

    • Carcinoembryonic antigen (CEA) is a tumor marker.
    • Accurate diagnostic tools for bronchopulmonary neoplasms are crucial.

    Purpose of the Study:

    • To evaluate the diagnostic utility of sputum carcinoembryonic antigen (CEA) levels for bronchopulmonary neoplasms.
    • To compare CEA levels in sputum across different patient groups.

    Main Methods:

    • Enzyme immunoassay was used to measure sputum CEA levels.
    • Patients included those with lung cancers, other malignancies, and non-malignant pulmonary diseases.

    Main Results:

    • Mean sputum CEA levels were significantly higher in lung cancer patients (3,682 +/- 1,648 ng/ml) compared to those with benign pulmonary diseases (444 +/- 102 ng/ml) (p < 0.01).

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  • Patients with other malignancies showed intermediate sputum CEA levels (630 +/- 473 ng/ml).
  • No correlation was found between serum CEA levels and sputum CEA levels.

    • Conclusions:

    • Sputum CEA assay is a potentially useful and simple diagnostic test for bronchopulmonary neoplasms.
    • Sputum CEA levels can help differentiate lung cancers from non-malignant pulmonary conditions.