Is genetic testing necessary for cancer patients?

Oct 19, 2023 Source: Cainiu Health

Dr. You Zhangxuan

Introduction

In general, it is necessary for cancer patients to undergo genetic testing. In most cases, genetic testing is highly essential for cancer patients. Due to tumor heterogeneity and individual differences among patients, gene expression levels vary significantly. As different gene expressions may require different treatments, the selection of targeted therapies largely depends on the results of genetic testing.

In general, it is necessary for cancer patients to undergo genetic testing. If any discomfort or symptoms occur, it is recommended to seek medical attention at a hospital promptly to avoid delays in treatment. The detailed analysis is as follows:

In most cases, genetic testing is highly necessary for cancer patients. Due to tumor heterogeneity and individual variability, gene expression levels differ among patients, which directly influences treatment options—particularly the selection of targeted therapies based on genetic test results. Targeted drugs used in targeted therapy are prescribed according to these genetic findings. Tumors such as lung cancer, breast cancer, liver cancer, colorectal cancer, and leukemia are particularly prone to gene mutations. Patients may follow their doctor's advice to use medications such as docetaxel injection or lenalidomide capsules for treatment.

Additionally, certain cancers have a clear hereditary tendency, and genetic testing can help determine whether a patient’s cancer is related to genetic factors. For example, mutations in genes associated with Lynch syndrome increase an individual’s risk of developing colorectal cancer, endometrial cancer, and other types of cancer. If such gene mutations are detected in a patient, family members may also carry the same mutation and face elevated cancer risks. Genetic testing enables genetic counseling for both the patient and their family, allowing relatives to undergo appropriate testing and screening—such as regular colonoscopies or gynecological exams—to facilitate early detection of cancer or precancerous lesions.

Patients are advised to actively complete relevant examinations and cooperate closely with their doctors during treatment. In daily life, maintaining a light diet and healthy lifestyle habits is recommended to support recovery.

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