Post-surgical ctDNA-based molecular residual disease detection in patients with stage I uterine malignancies.

INTRODUCTION: Among uterine malignancies, endometrial cancer (EC) is the most common cancer of the female reproductive tract. Traditionally, risk stratification in EC is determined by standard clinicopathological risk factors. Although circulating tumor DNA (ctDNA) has emerged as a prognostic biomarker in various malignancies, its clinical validity in EC remains to be established. METHODS: In this analysis of real-world data, 267 plasma samples from 101 patients with stage I EC were analyzed using a tumor-informed ctDNA assay (Signatera™ bespoke mPCR-NGS). Patients were followed post-surgically and monitored with ctDNA testing for a median of 6.8 months (range: 0.37-19.1). RESULTS: Patients who tested ctDNA-positive at both their first time point and longitudinally experienced inferior recurrence-free survival (RFS) (HR = 6.2; p = 0.0006 and HR = 15.5; p < 0.0001, respectively), and showed a recurrence rate of 58% and 52%, vs. 6% and 0%, respectively for the ctDNA-negative patients. Most ctDNA-positive patients had high-risk histologies or sarcoma, versus low-risk and high-intermediate risk (H-IR) EC. Furthermore, patients with high-risk histologies who were ctDNA-positive showed shorter RFS compared to those who tested negative (HR = 9.5; p = 0.007), and those who tested positive in the low/H-IR cohort (HR = 0.25; p = 0.04). Post-surgically, detectable ctDNA was highly prognostic of clinical outcome and remained the only significant risk factor for recurrence when adjusted for clinicopathological risk factors, such as histologic risk group, mismatch repair (MMR), and p53 status. CONCLUSION: Incorporating ctDNA monitoring along with traditional known risk factors may aid in identifying patients with stage I EC who are at highest risk of recurrence, and possibly aid in treatment stratification.

A qualitative study of patients' attitudes towards telemedicine for gynecologic cancer care.

INTRODUCTION: Women with gynecologic cancers may face geographic barriers to standard-of-care consultation with a gynecologic oncologist. While telemedicine may help overcome these geographic barriers, there are no qualitative data exploring gynecologic cancer patients' attitudes towards telemedicine for cancer care. Patients with gynecologic malignancies may have preferences distinct from general oncology populations due to the sensitive nature of the diseases and anatomy involved. METHODS: Semi-structured interviews were conducted with 15 patients with gynecologic cancers to identify perceived advantages and disadvantages of telemedicine use for gynecologic cancer care. Past experience with telemedicine was elicited as were suggestions for cancer care encounters most compatible with telemedicine. Interviews were transcribed, coded, and analyzed for emergent themes. RESULTS: All patients interviewed were open to the use of telemedicine. Emergent themes regarding advantages of telemedicine included convenience, cost savings, reduced travel, avoidance of infectious disease, and availability of care for those too unwell for in-person visits. Themes regarding disadvantages of telemedical care included technical difficulties, perceived need for examination or testing, and potential compromise of therapeutic relationship. Patients were particularly concerned that difficulty in establishing a therapeutic relationship would compromise initial consultations with gynecologic oncologists via telemedicine. CONCLUSION: Patients with gynecologic cancer are open to use of telemedicine for their care. Particular attention should be paid to overcoming patients' hesitancy to have initial visits with gynecologic oncologists, as these consultations have the greatest potential to improve access to high-quality gynecologic cancer care.