Why is Squamous Cell Carcinoma Antigen (SCC) High? Causes, Symptoms, and What to Do

Learn about the causes of high Squamous Cell Carcinoma Antigen (SCC) levels, associated symptoms, and when to seek medical advice.

Aug 18, 2026 3 min read

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Squamous Cell Carcinoma Antigen (SCC) is a protein that can be measured in the blood. It is often used as a tumor marker, particularly for squamous cell cancers such as those affecting the cervix, lung, and head and neck. If your SCC levels are high, it may indicate the presence of these cancers or other conditions. Understanding why SCC levels may be elevated and what this means for your health is important.

What is Squamous Cell Carcinoma Antigen (SCC)?

SCC is a protein that is typically found in small amounts in the blood. In healthy adults, the normal range is typically less than 1.5 ng/mL. This marker is primarily used to monitor known squamous cell cancers rather than as a screening tool. Elevated SCC levels can be a sign that a squamous cell carcinoma is present or progressing.

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Causes of High SCC Levels

High SCC levels can be caused by several factors, most notably the presence of squamous cell carcinoma. This type of cancer can occur in various parts of the body, including the cervix, lungs, and head and neck areas. Other potential causes of elevated SCC levels include non-malignant conditions such as psoriasis, eczema, and liver disease, which can also increase the SCC levels in the blood.

Symptoms Associated with High SCC Levels

While high SCC levels themselves do not cause symptoms, they can be associated with the underlying conditions that lead to their elevation. Symptoms will vary depending on the location and type of cancer or other condition. For example, cervical cancer may present with abnormal vaginal bleeding, while lung cancer might cause persistent cough or chest pain. It is important to discuss any symptoms you experience with your healthcare provider.

How to Interpret SCC Test Results

If you have undergone testing and your SCC level is higher than the typical range of less than 1.5 ng/mL, it is essential to discuss these results with your healthcare provider. Elevated levels can indicate the presence or progression of squamous cell carcinoma, but they can also result from other non-cancerous conditions. Your doctor will consider your SCC levels alongside other diagnostic information to determine the best course of action.

Frequently asked questions

What does an SCC level above 1.5 ng/mL mean?

An SCC level above 1.5 ng/mL may suggest the presence or progression of squamous cell carcinoma, but it can also be due to non-cancerous conditions. Further evaluation by a healthcare provider is necessary.

Can high SCC levels be caused by non-cancerous conditions?

Yes, conditions such as psoriasis, eczema, and liver disease can also lead to elevated SCC levels.

Is SCC used for cancer screening?

No, SCC is not typically used for cancer screening. It is primarily a monitoring marker for known squamous cell cancers.

What should I do if my SCC levels are high?

If your SCC levels are high, you should consult your healthcare provider to determine the cause and appropriate next steps.

When to see a doctor

You should see a doctor if your SCC levels are elevated, especially if you have symptoms that could be related to squamous cell carcinoma. Early consultation with a healthcare provider can help determine the cause of the elevated levels and guide appropriate management.

Remember, this information is not a substitute for professional medical advice. Decisions about your health should be made in consultation with your healthcare provider.

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