[Value of differential cytology in the diagnosis of preclinical forms of cervix uteri cancer].

The value of "differential cytology" in the diagnosis of preclinical carcinoma of the cervix uteri was assessed from serial sections of operative specimens in a series of 452 patients. Although not absolute, this value was found to be considerable. Used to supplement colposcopy-guided biopsy, it makes it possible to decide on the therapeutic approach (notably simple destruction by laser) without having recourse to conization. However, the results are only valid for the team which presents them, and before deciding to treat intra-epithelial carcinomas by laser destruction, each team must perform the same "quality control".