Effects of Endometrial Ablation on Treatment Planning in Women With Endometrial Cancer.

To evaluate effects of endometrial ablation on the staging and treatment planning of postablation endometrial cancer. After authorization from the institutional review board, we performed a retrospective chart review of patients with a history of endometrial ablation and a subsequent diagnosis of endometrial cancer from July 2006 to December 2013. The information obtained included patient's age at time of cancer diagnosis, pre-ablation endometrial biopsy histology, dilation and curettage histology at time of ablation, endometrial biopsy-to-ablation interval, ablation-to-hysterectomy interval, final pathologic diagnosis, Fédération Internationale de Gynécologie et d'Obstétrique (FIGO) staging, and treatment recommendations for adjuvant therapy. The histopathology was examined by a gynecologic pathologist. The National Comprehensive Cancer Network guidelines were applied to determine need for adjuvant therapy. Six of 490 (1.2%) patients with endometrial cancer were identified to have an antecedent ablation. Mean patient age was 48.2 years (range: 40-53). The time interval from office pre-ablation endometrial sampling to ablation ranged from 1 to 17 months. Four patients (67%) had an undetected endometrial cancer at the time of ablation, despite having benign pre-ablation histology. Following surgical staging, 4 patients (67%) had no evidence of residual carcinoma, and 2 (33%) had evidence of endometrial adenocarcinoma grades 1 to 2. There was no evidence of myometrial invasion in all cases, and a FIGO stage of IA was assigned. No adjuvant therapies were indicated. There have been no documented cancer recurrences, with a follow-up range from 16 to 52 months (average 30.2). Endometrial ablation artifact does not appear to hinder evaluation and treatment planning in the presence of endometrial cancer.