Under what circumstances do cervical scraping

Cervical scraping, normally done is cervical scraping, is a method of detecting cervical cancer, in the case of cervical transformation zone is not good, that is to say, if the cervical transformation zone can not be clearly seen during gynecological examination, when cervical cancer screening is done, simple liquid-based cytological examination may show missed diagnosis. Scratching of the cervical canal is necessary, and exfoliated cells from the cervical canal can be taken for pathological examination to determine whether there is cervical precancerous lesions or cervical cancer. Therefore, cervical scraping is required. This examination is not very different from liquid-based cytology in nature, but the site of sampling is different. If the brush used for liquid-based cytology alone may not be able to get exfoliated cells from the cervical canal.