What is the normal range for tumor markers in blood tests?

Aug 21, 2023 Source: Cainiu Health

Dr. You Zhangxuan

Introduction

In general, the normal reference ranges for tumor markers in blood tests vary depending on the specific marker and laboratory standards, so exact values cannot be determined uniformly. Common tumor markers include carcinoembryonic antigen (CEA), carbohydrate antigen 125 (CA125), carbohydrate antigen 199 (CA199), and prostate-specific antigen (PSA). The defined normal ranges for each marker may differ among laboratories.

Generally, the normal reference range for tumor markers in blood tests varies depending on the specific marker and laboratory standards, so it is not possible to determine exact values universally. A detailed explanation is as follows:

Common tumor markers include carcinoembryonic antigen (CEA), carbohydrate antigen 125 (CA125), carbohydrate antigen 19-9 (CA19-9), prostate-specific antigen (PSA), among others. The defined normal range for each marker may differ based on the laboratory, gender, age, and individual variations. Laboratories typically provide a reference range representing the values observed in the majority of healthy individuals. If a person's marker level falls outside this range, further evaluation and testing may be required. It is important to note that tumor markers are not definitive diagnostic tools for cancer; they serve only as an auxiliary method. The normal reference range is merely a guideline and should not be used alone to confirm or rule out cancer. Other factors such as inflammation, infection, or liver dysfunction can also cause elevated tumor marker levels.

Therefore, if you have concerns about your tumor marker results, it is recommended to consult a qualified physician or visit a reputable medical institution for evaluation. The doctor will make an accurate diagnosis and assessment by considering clinical symptoms, physical examination findings, and other relevant test results in combination.

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