TCT examination (thin-layer liquid-based cytology test)It is an advanced technology for cervical cancer screening that improves the detection rate of cancer cells by collecting cervical exfoliated cells and processing them with liquid-based thin layers. The main content is divided into:Definition and Principle(liquid-based cytology technology),Applicable people(Sexual women, HPV infected persons, etc.),Check process(sampling, preparation, microscopic analysis),clinical significance(early detection of precancerous lesions) andThings to note(Avoid sexual intercourse before examination). This will be expanded upon in detail below.

Core principles of TCT examinationCervical cells are dispersed into thin layers through a special preservation solution to reduce interference from impurities and improve detection accuracy. Traditional Pap smear can easily miss diagnosis due to accumulation of cells, while TCT technology can evenly distribute cells through automated preparation, making it easier for pathologists to identify abnormalities. This technology can detectcervical squamous intraepithelial lesions(such as LSIL, HSIL) andHPV infection, is a key means of secondary prevention of cervical cancer.

Applicable peopleThis includes sexually active women over 21 years old, especially those who are HPV-positive, long-term contraceptive users, or those with low immunity. Suggestions andHPV testingJoint screening is done every 3-5 years for women over 30 years old. During the examination, the doctor gently scrapes the cervical cells with a brush. The process takes about 5 minutes. There may be slight discomfort but no pain. After sampling, the cells are placed in preservation solution and sent for testing, and the results will be available in 3-7 days.

Interpretation of TCT reportTerms to note:"No intraepithelial lesions seen"(normal),"ASC-US"(Atypical cells of unknown significance require HPV testing and triage),"LSIL/HSIL"(Low/high grade lesions require colposcopy biopsy). If the results are abnormal, further testing is required rather than direct treatment. Precautions include: avoid sexual intercourse, vaginal medication or douching 24 hours before the examination, and testing is not suitable during menstrual period.

To sum up,TCT examinationIt is one of the "gold standards" for cervical cancer screening and can significantly reduce the missed diagnosis rate. Combined HPV testing can cover more than 90% of high-risk groups, but attention should be paid to itslimitations(If tissue biopsy cannot be substituted). Regular screening + vaccination is the best strategy to prevent cervical cancer. Common domestic TCT detection systems includeThinPrepandLBP, produced by Hologic, Dean Diagnostics and other companies.

Quote sources:
1. "Obstetrics and Gynecology" (9th edition), People's Medical Publishing House
2. World Health Organization (WHO) Cervical Cancer Screening Guidelines
3. American Cancer Society (ACS) TCT examination technical instructions