<P> In this method , cells are collected after they have been either spontaneously shed by the body ( `` spontaneous exfoliation '' ) , or manually scraped / brushed off of a surface in the body ( `` mechanical exfoliation '' ) . An example of spontaneous exfoliation is when cells of the pleural cavity or peritoneal cavity are shed into the pleural or peritoneal fluid . This fluid can be collected via various methods for examination . Examples of mechanical exfoliation include Pap smears , where cells are scraped from the cervix with a cervical spatula , or bronchial brushings , where a bronchoscope is inserted into the trachea and used to evaluate a visible lesion by brushing cells from its surface and subjecting them to cytopathologic analysis . Liquid - based cytology collects the samples in the same way but places them in liquid that is then treated to allow for improved results . </P>
<P> In this method , cells are collected after they have been either spontaneously shed by the body ( `` spontaneous exfoliation '' ) , or manually scraped / brushed off of a surface in the body ( `` mechanical exfoliation '' ) . An example of spontaneous exfoliation is when cells of the pleural cavity or peritoneal cavity are shed into the pleural or peritoneal fluid . This fluid can be collected via various methods for examination . Examples of mechanical exfoliation include Pap smears , where cells are scraped from the cervix with a cervical spatula , or bronchial brushings , where a bronchoscope is inserted into the trachea and used to evaluate a visible lesion by brushing cells from its surface and subjecting them to cytopathologic analysis . Liquid - based cytology collects the samples in the same way but places them in liquid that is then treated to allow for improved results . </P>
in exfoliative cytology the cells for examination are obtained by
in exfoliative cytology the cells for examination are obtained by
spontaneously shed by the body or manually scraped / brushed off of a surface in the body
spontaneously shed by the body or manually scraped / brushed off of a surface in the body