Values of tumor volume on magnetic resonance imaging for a surgical approach to endometrial cancer

Abstract

Abstract Objective To analyze the relationship between tumor volume in Endometrial Cancer (EC) on Magnetic Resonance Imaging (MRI) and lymph node metastasis to establish which patients benefit from omitting the lymphadenectomy. Methods A retrospective observational study with 194 patients with EC identified between 2016 and 2021 at the Juan Ramón Jiménez University Hospital, Huelva (Spain) was carried out. Preoperative MRI of 127 patients was assessed. The tumor volume was analyzed on MRI by the ellipsoid formula and another alternative method with a manual ROI in different sections. Risk factors for node metastases were analyzed to understand its relationship and to identify an optimum criterion for the tailored surgery. Results Univariate analysis showed risk factors for lymph node metastases were histological grade (p = 0.001), tumor with a volume greater than >25 cm3 (p 28 (p 25 cm3 was an independent risk factor for lymph node metastases. The patients without significant proposed risk factors (volume index >25 cm3 [OR = 0.64], Ca 125 > 28 [OR = 0.32], and high histological grade [OR = 2.6]) did not present lymph node metastases, independent of myometrial invasion. Conclusions Lymphadenectomy can be omitted in patients with Endometrioid carcinoma that do not have any of the following risk factors: high‐grade tumor, elevated Ca 125 (>28), and tumor volume on MRI greater than 25 cm3. Tumor volume might predict the state of lymph nodes in EC and it could give information regarding surgical management.

Keywords

• endometrial cancer
• lymph node metastases
• lymphadenectomy
• MRI
• tumor volume