There are varying rates of regression of biopsy-proven HSIL in pregnancy ranging from 34% to 70% (Obstet Gynecol. 1999 Mar;93[3]:359-62; Acta Obstet Gynecol Scand. 2006;85[9]:1134-7; Reprod Sci. 2009 Nov;16[11]:1034-9). Out of more than 200 patients across these three studies, just two patients were diagnosed with an invasive lesion post partum. Given the low likelihood of progression during pregnancy and the high rate of regression, an excisional procedure should be considered only in cases where there is concern about invasive carcinoma.
In cases where an invasive lesion is suspected, consider an an excisional procedure. While there is some evidence that performing a laser excisional procedure early in pregnancy (18 weeks and earlier) can be safely done, that is not the most common management strategy in the United States (Tumori. 1998 Sep-Oct;84[5]:567-70; Int J Gynecol Cancer. 2007 Jan-Feb;17[1]:127-31). In this circumstance, referral to a gynecologic oncologist is warranted where consideration can be made for performing a cold knife conization. Physicians should be aware of the increased risk of bleeding with this procedure in pregnancy and the potential for preterm birth. There is little literature to guide counseling regarding these risks, and the decision to perform an excisional procedure should be made with a multidisciplinary team (Arch Gynecol Obstet. 2016 Jan 4. doi: 10.1007/s00404-015-3980-y).
The see-and-treat paradigm is not recommended in pregnancy. Those patients with poor follow-up should still undergo colposcopic-directed biopsies prior to any excisional procedure.
Treatment recommendations in pregnancy should be made on the basis of careful consideration of individual patient factors, with strong consideration of repeat testing with cytology and colposcopy prior to an excision procedure.
Dr. Sullivan is a fellow in the division of gynecologic oncology at the University of North Carolina at Chapel Hill. Dr. Gehrig is professor and director of gynecologic oncology at the university. Dr. Sullivan and Dr. Gehrig reported having no relevant financial disclosures. Email them at obnews@frontlinemedcom.com.