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Cervical cone biopsy has become an important surgical procedure for endocervical adenocarcinoma in situ (AIS), especially for patients who desire to retain their fertility. Establishing the usefulness of the endocervical margin status in cone biopsy specimens as a predictor of residual AIS is paramount. We examined the status of the endocervical margin in the cone biopsy specimen, the distance between the most proximal AIS and the endocervical margin in the cone biopsy specimen, and the endocervical curettage (ECC) specimen performed at the time of cone biopsy and residual AIS in the hysterectomy specimens of 61 patients with specimens accessioned from 1968 through 1997; 43 (30%) of patients with a negative endocervical margin had residual AIS in the hysterectomy specimen. Conversely, 10 of 18 (56%) patients with a positive endocervical margin in the cone biopsy specimen had no AIS in the hysterectomy specimen. All 6 patients with AIS in the ECC specimen had residual AIS. No patient with an endocervical margin in the cone biopsy specimen greater than 10 mm had residual AIS. Patients with distances less than 10 mm had equal percentages of residual AIS. In general, more patients with a negative endocervical margin in the cone biopsy specimen had no residual AIS in the hysterectomy specimen than those with a positive endocervical margin in the cone biopsy specimen. However, the status of this margin is not useful for predicting the presence of residual AIS. Pathologists should report the distance between the endocervical cone biopsy margin and the closest AIS.

The Status and Distance of Cone Biopsy Margins as a Predictor of Excision Adequacy for Endocervical Adenocarcinoma In Situ