[Tumor-associated markers in malignant lung neoplasms]

Area of Science:

• Oncology
• Biomarkers
• Cancer Diagnostics

Background:

• Lung cancer diagnosis relies on accurate tumor marker assays.
• Evaluating the sensitivity and specificity of various markers is crucial for effective patient management.

Purpose of the Study:

• To assess the diagnostic utility of tumor markers: Carcinoembryonic antigen (CEA), Ferritin, Germ cell-associated antigen (GICA), and Tissue polypeptide antigen (TPA) in lung cancer.
• To compare the effectiveness of these markers across different histological subtypes of lung cancer.

Main Methods:

• Assayed CEA, Ferritin, GICA, and TPA in 63 lung cancer patients and 44 patients with benign lung conditions.
• Analyzed marker sensitivity and specificity in relation to tumor histology.

Main Results:

• Ferritin demonstrated the highest sensitivity (73%) compared to CEA/GICA (47.6%) and TPA (19%).
• Ferritin showed strong performance across histological types: Adenocarcinomas (70%), Squamous cell carcinomas (70%), Microcytomas (62.5%), and Large cell anaplastic carcinomas (87.5%).
• CEA and GICA had similar sensitivity levels, while TPA showed low sensitivity across all types. Specificity was satisfactory for all markers.

Conclusions:

• Ferritin is the most effective single tumor marker for lung cancer.
• Combining Ferritin assays with CEA and/or GICA provides optimal diagnostic accuracy for lung cancer.