As data continue to accumulate, the clinical characteristics of preinvasive and early invasive glandular cervical neoplasia are becoming progressively better defined. Cytologic screening for these lesions is imprecise; however, modifications to current classification systems may improve the overall accuracy. All glandular abnormalities on the Papanicolaou smear, nevertheless, require judicious evaluation and careful follow-up. Cervical conization is the most definitive means of diagnosing adenocarcinoma in situ (ACIS). Because ACIS has been thought to represent a multifocal process, with negative conization margins having limited predictive value, conservative management protocols have been difficult to endorse. Several large studies now indicate that the surgical margin status may be a more reliable indicator of true disease clearance than previously thought. For young patients desiring to maintain reproductive capacity, ACIS appears to be safely managed by cold-knife conization combined with diligent surveillance. Early invasive adenocarcinoma of the uterine cervix is associated with an excellent prognosis, and recent data suggest that radical surgery may be unnecessary.