What tumor markers are tested for lung cancer?

Apr 17, 2023 Source: Cainiu Health

Dr. Sun Qifeng

Introduction

Lung cancer tumor markers include carcinoembryonic antigen (CEA), cytokeratin 19 fragment antigen (CYFRA 21-1), and squamous cell carcinoma antigen (SCC). A CEA level above 5.0 ng/mL warrants caution for possible malignant tumors. A CYFRA 21-1 level exceeding 3.3 ng/mL may indicate the presence of lung cancer. A positive result for SCC suggests either lung cancer or recurrence of the disease.

Lung cancer can typically be screened through tumor markers such as carcinoembryonic antigen (CEA), cytokeratin 19 fragment antigen (CYFRA 21-1), and squamous cell carcinoma antigen (SCC-Ag). Detailed analysis is as follows:

1. Carcinoembryonic Antigen (CEA)

This is an acidic glycoprotein exhibiting characteristics of human embryonic antigens, serving as a marker for diseases such as lung and colorectal cancers to help determine whether malignant cellular transformation has occurred. A level greater than 5.0 ng/mL warrants concern for possible malignancy.

2. Cytokeratin 19 Fragment Antigen (CYFRA 21-1)

This is a relatively new tumor marker for detecting lung cancer and holds significant value in diagnosing non-small cell lung cancer. If the serum concentration exceeds 3.3 ng/mL, lung cancer may be present.

3. Squamous Cell Carcinoma Antigen (SCC-Ag)

This antigen primarily exists in squamous epithelial cells. Since the lungs also contain abundant squamous epithelium, SCC-Ag can serve as a tumor marker for lung cancer to assess the presence or recurrence of the disease. A positive test result suggests either active lung cancer or recurrence.

In addition, other markers such as neuron-specific enolase (NSE) may also be tested. Once lung cancer is confirmed through tumor marker testing, it is recommended to promptly initiate standardized treatment under a physician's guidance to control disease progression.

Related Articles

View All

Why is chemotherapy required after major cancer surgeries?

In general, patients with cancers such as lung cancer, gastric cancer, and breast cancer often require chemotherapy after surgery due to surgical trauma and stress, decreased immune function, minimal residual disease, active cell proliferation, and increased potential for metastasis. If any discomfort occurs, seek timely medical evaluation and treatment at a正规 hospital. In daily life, it is important to maintain a balanced diet with adequate protein and vitamin intake, and to follow a regular sleep schedule, avoiding staying up late.

View Full Answer

What causes foot swelling in late-stage lung cancer?

In general, foot swelling in the late stages of lung cancer may be caused by prolonged bed rest, malnutrition, heart failure, renal failure, or deep vein thrombosis in the lower limbs. If discomfort symptoms occur, it is recommended to seek timely medical treatment at a正规 hospital. In daily life, regularly assist the patient with limb exercises, ensure adequate nutrition, and follow professional dietary guidance.

View Full Answer

Why can't lung cancer patients eat properly?

In general, loss of appetite in lung cancer patients may be caused by factors such as anxiety, sleep disturbances, gastritis, intestinal obstruction, or liver metastases. If discomfort occurs, it is recommended to seek timely medical evaluation and treatment at a正规 hospital. In daily life, maintaining a positive mindset and avoiding excessive anxiety are important, along with keeping a regular schedule and ensuring adequate sleep.

View Full Answer

Why does edema occur in late-stage lung cancer?

Edema in advanced lung cancer is often associated with reduced physical activity, malnutrition, cardiac insufficiency, renal impairment, and superior vena cava obstruction syndrome. If discomfort symptoms occur, it is recommended to seek timely medical evaluation and treatment at a正规 hospital. In daily life, maintain a balanced diet, control salt intake, engage in moderate physical activity, and avoid prolonged bed rest.

View Full Answer

What does it mean when a late-stage lung cancer patient stops coughing?

In general, the absence of coughing in late-stage lung cancer may be due to reasons such as relieved dryness in the respiratory tract, stabilized emotional state, improvement of chronic bronchitis, atelectasis, or pleural effusion. If any discomfort occurs, it is recommended to seek timely medical evaluation and treatment at a正规 hospital. In daily life, ensure indoor air circulation; quit smoking and avoid secondhand smoke.

View Full Answer

Which is more severe: novel coronavirus infection or lung cancer?

Novel coronavirus infection and lung cancer are two distinct diseases with different characteristics, and their severity must be evaluated on a case-by-case basis. In daily life, it is essential to quit smoking and avoid polluted environments to reduce irritation to the lungs. Ensure adequate nutritional intake, focusing on high-quality proteins, fresh vegetables, and fruits. Maintain regular作息 (daily routines), avoid overexertion, and engage in moderate exercise to strengthen physical health. Follow a scheduled routine for regular medical check-ups to enable early detection and early intervention of diseases.

View Full Answer

Which internal organs can be damaged by smoking?

Smoking is extremely harmful to the human body and generally causes damage to the lungs, heart, liver, kidneys, and stomach. Harmful substances in tobacco smoke directly irritate the respiratory mucosa; long-term exposure can lead to chronic bronchitis, emphysema, and even lung cancer. Smoke also reduces pulmonary ventilation function, resulting in decreased respiratory efficiency and symptoms such as coughing and shortness of breath.

View Full Answer

Can lung nodules cause back pain?

If a pulmonary nodule is relatively large in size (diameter exceeding 3 cm) or located close to the pleura, compressing or invading the pleura and surrounding nerve tissues, it may cause back pain. Some malignant nodules (such as early-stage lung cancer) can lead to radiating back pain when local invasion occurs. The pain is often described as dull or aching and may worsen with breathing or coughing, indicating a potential risk of disease progression that requires vigilance.

View Full Answer

Your trusted source for health information and wellness guidance.

Quick Links

Resources

Connect

© 2024 HealthPortal. All rights reserved.