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Why do you need to do CT-guided needle biopsy?
Why do you need to do CT-guided needle biopsy? What is CT-guided needle biopsy?
01. What is CT-guided needle biopsy?
CT-guided puncture biopsy is based on imaging diagnosis. Under the guidance of medical imaging equipment, a puncture needle is used to accurately pierce the lesion to obtain tissue and cytology samples to obtain the pathology, immunohistochemistry, or pathology of the lesion. A minimally invasive operation technique for diagnosis such as genetics.
02. What is the purpose of CT biopsy?
The purpose of CT biopsy is to get a more definite diagnosis, and then to guide the next treatment. Clinically, it is easy to misdiagnose the benign and malignant diseases based on imaging performance. For suspicious cancers, pathological test results after puncture are also needed to clarify the cytological type, degree of differentiation, and sensitivity of molecular targeted therapy. information.
03. What results can be obtained after CT biopsy?
After needle biopsy, pathological test results, immunohistochemical test results and genetic test results can be obtained. The clinical guiding significance of these three results is mainly in three aspects:
- Ordinary pathology tests to confirm whether it is cancer or not, the result is about 3-5 working days;
- Immunohistochemical testing is to determine the type of cancer and the degree of differentiation of the cancer; it usually takes 5-7 working days;
- The results of genetic testing are used to determine whether it is suitable for molecular targeted therapy. Genetic testing is generally performed after the cancer type is determined, and the results generally take 10-15 working days.
04. Advantages of CT biopsy:
Clinically, in addition to CT-guided needle biopsy, other biopsy methods include bronchoscopy needle biopsy (diagnostic positive rate 20%-70%), open thoracic biopsy or minimally invasive thoracoscopic biopsy (large traumatic), ultrasound-guided needle biopsy ( The available biopsy site has large limitations) and so on.
CT-guided needle biopsy, compared with other guidance methods, the size, shape, and spatial position relationship of the lesion with the surrounding tissue and blood vessels can be displayed more clearly under the guidance of CT images, and then accurately locate and monitor the direction of needle insertion in real time. It is less traumatic, safer, and has a high accuracy of about 95%. It is especially advantageous for CT-guided biopsy of the lungs and abdominal cavity (liver, pancreas, kidney) with deep lesions.
05. What the patient needs to do before CT puncture:
1) Lung puncture requires chest enhanced CT within 1 month, infection screening results within 3 months, complete blood cell analysis within 1 week, 72h coagulation test results, and patients with basic cardiopulmonary disease need ECG, lung Function check. Lung puncture can generally eat and drink normally.
2) Bone and soft tissue puncture requires recent enhanced MRI or PET-CT of the lesion, infection screening results within 3 months, complete blood cell analysis within 1 week, and coagulation test results. Bone and soft tissue puncture can eat and drink normally.
3) Abdomen (liver, kidney, pancreas) needs recent enhanced CT images of the abdomen, infection screening results within 3 months, whole blood cell analysis within 1 week, and coagulation test results. Abdominal puncture on an empty stomach for 4-6 hours.
(source:internet, reference only)