Effect of coexisting adenomyosis on patients with endometrioid adenocarcinoma: Determination of intraoperative risk factors for tumor metastasis and estimation of prognosis

Context: We sought to clarify the impact of adenomyosis on the clinical and pathological prognosis of endometrial cancer to aid the selection of appropriate surgical intervention based on the diagnosis of adenomyosis. Aims: Our study aimed to report the frequency of adenomyosis in patients with endometrioid cancer and correlate its incidence rate with the survival and prognostic factors. Materials and Methods: This retrospective study included 357 patients. Patients with endometrioid adenocarcinoma were divided into two groups based on the presence of adenomyosis. The groups were compared in terms of tumor diameter, lymphovascular space invasion (LVSI), low-high risk pathologic status, stage of the disease, and survival outcome. Statistical Analysis Used: Continuous variables were analyzed using the Student's t or Mann-Whitney U-test. Survival data were analyzed using the Kaplan-Meier test. Results: The average age was similar between the two groups. In total, 47 (13.2%) of 357 patients had adenomyosis. A total of 43 (91.4%) cases with adenomyosis and 258 (83.2%) cases without adenomyosis had Stage I endometrioid adenocarcinoma (n = 301, 84.3%). Moreover, 32 (68.1%) cases with adenomyosis and 187 (60.3%) cases without adenomyosis were in the low-risk group. There was no statistically significant correlation between the risk groups (P = 0.309) and overall survival between the two groups (P = 0.416). Conclusion: No correlation was seen between the characteristics of endometrioid type endometrial cancer and survival rates in patients with or without adenomyosis. The impact of adenomyosis as a factor in evaluating the perioperative prognosis and planning postoperative adjuvant therapy for endometrial cancer should be assessed by further studies.