Endometrial carcinoma: Evaluation using diffusion-tensor imaging and its correlation with histopathologic findings

Area of Science:

• Magnetic Resonance Imaging
• Oncology
• Medical Imaging

Background:

• Accurate preoperative assessment of tumor invasion depth and histologic grade is crucial for endometrial carcinoma (EMC) prognosis.
• These factors are often difficult to determine noninvasively before treatment.

Purpose of the Study:

• To evaluate the utility of diffusion-tensor imaging (DTI) for noninvasively assessing tumor invasion depth and histologic grade in EMC patients.
• To establish DTI as a reliable tool for preoperative staging of EMC.

Main Methods:

• Prospective study of 25 surgically treated EMC patients.
• DTI performed on a 1.5T MRI system, analyzing fractional anisotropy (FA), mean diffusivity (MD), and axial diffusivity (AD) maps.
• Comparison of DTI findings with histopathologic results using statistical analyses, including ROC curves.

Main Results:

• DTI maps clearly delineated EMCs from normal uterine tissue, with identical tumor invasion depth findings compared to histopathology.
• Axial diffusivity (AD) maps showed significantly lower values in EMCs, providing excellent tumor-to-uterus contrast.
• Fractional anisotropy (FA) values demonstrated a significant inverse correlation with EMC histologic grades (1, 2, and 3).

Conclusions:

• Diffusion-tensor imaging (DTI) shows significant promise as a noninvasive method for evaluating both tumor invasion depth and histologic grade in endometrial carcinoma.
• DTI can aid in preoperative assessment, potentially improving treatment strategies and patient outcomes for EMC.