Original researchRate of human papillomavirus clearance after treatment of cervical intraepithelial neoplasia 1 ☆,
Section snippets
Materials and methods
The institutional review board of Huddinge Hospital approved the study (decision no. 126/95).
For maximum generalizability, all women admitted to the Department of Gynecology and Obstetrics, Huddinge University Hospital, Stockholm, Sweden, for treatment of CIN I–III (66 women with CIN III, 21 with CIN II, and 22 with CIN I) from September 1995 to September 1997 and giving informed consent were eligible to be enrolled. There was no HIV screening. The CIN diagnosis was based on diagnostic biopsy
Results
One hundred nine women (mean age 32.5 years, range 20–71) were enrolled in the study. These women were sampled before treatment of CIN, and 104 women had an adequate β-globin-positive sample. Twenty of 104 women (19%) were negative for HPV DNA. Six of these women became HPV positive in at least one visit during follow-up.
Among the 84 women with positive HPV DNA tests, 18 double infections were detected, giving a total of 102 cervical infections. Human papillomaviruses 16, 18, and 31 were by far
Discussion
The objective of the present study was not to investigate whether HPV infection causes CIN III, as this is already well known, but to investigate whether HPV can be cleared after treatment and at what rate. Clearance of HPV DNA was rapid and usually occurred within 3 months after treatment. Our mean length of follow-up was only 16 months, but there were few additional clearances occurring after 6 months. HPV DNA clearance was primarily found in the conization group, suggesting that this type of
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This study was supported by Europe Against Cancer, the Swedish Cancer Society, the Swedish Society for Medical Research, and Anders Otto Swärd Foundation for Medical Research. The Swedish Medical Research Council supports JD.
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The authors thank Assistant Professor Peter Lidbrink, Department of Dermatovenereology, Huddinge University Hospital, for invaluable help with examining the male partners; Dr. Ilvars Silins for the statistical analyses; and Ms. Carina Eklund for excellent technical assistance.
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JMMW died February 1, 2000.