Objective: To evaluate cytological surveillance for women older than 50 years, to detect recurrent or residual disease after treatment of cervical intraepithelial neoplasia by loop excision.
Materials and methods: Women undergoing a large loop excision for high-grade squamous intraepithelial lesion or glandular cytological abnormalities during a period of 4 years (2000-2003) were identified from the colposcopy database. Women younger than 50 years or with a history of previous loop excision were excluded. Clinical data, histology, and follow-up cytology results for up to 2 years after treatment were collected.
Results: Eighty-nine patients were identified. Age of the women ranged from 51 to 66 years, with a median of 51.5 years. Thirty-two (36%) had severe dyskaryosis, 53 (60%) had moderate dyskaryosis, and 4 (4%) had glandular abnormalities on cervical cytology before the loop biopsy. Cervical intraepithelial neoplasia (CIN) 2,3 and glandular abnormalities, CIN 1, and no abnormalities were found in 50 (56%), 18 (20%), and 19 (22%) loop specimens, respectively. Invasive disease was found in 2 (2%) cases. They were excluded from further analysis. The lesion was completely excised in 58 (65%) and incompletely excised in 23 (26%) patients. It was not possible to comment on the margin status in 8 (9%) cases. These were excluded from further analysis. Of the 23 women who had margins involved, 8 (35%) had ectocervical, 12 (52%) had endocervical, and 3 (13%) had both margins involved. All women had follow-up cervical smears at the cytology clinic. At 6-month follow-up, 3 patients had persistent CIN and 4 had borderline changes on cervical smears. At 2 years follow-up, 3 patients had high-grade squamous intraepithelial lesion abnormalities, 2 of whom had clear margins at their loop biopsy earlier.Twenty percent of the women with positive endocervical margins on loop excision needed further treatment for residual or persistent disease on follow-up. Overall, 4 (5%) of the 79 patients who had a loop biopsy went on to have cytological abnormalities suggestive of persistent/residual disease needing further treatment.
Conclusion: Cytological surveillance for post-loop biopsy follow-up seems to be a good option for detecting residual disease in this high-risk group of patients.