An emergency-accident room is an effective gynecologic cancer detection center. In a 2½-yr study period cervical smears were obtained from 3,697 patients in a hospital unit of this kind. Two-hundred and sixty-one patients had positive smears, although 43% of these patients with positive smears had no gross cervical lesion. The predominant decade was from 20 to 29 yr of age, but an appreciable number of patients were teenagers. The obstetrics-gynecology department was able to obtain tissue studies on 165 of the 261 positive-smear patients, either when the smear was made (cases with visible cervical lesions) or during follow-up investigations. Eighty-two cases of malignancy were found; 33 were invasive carcinoma of the cervix.