Cytological Characteristics of Endometrial Phasing Using the Specimens Prepared with the Liquid-Based Procedure: Comparison with the Conventional Procedure

The Expression of VEGF and CD31 in Endometrial Lesions and Its Associations with Blood Flow Parameters of Transvaginal 3D Power Doppler Ultrasonography: A Preliminary Study

Aim

To investigate the association of the blood flow parameters measured by transvaginal three-dimensional power Doppler ultrasound and the angiogenesis of endometrial cancer.

Material and Methods

The expressions of vascular endothelial growth factor (VEGF) and CD31 in benign and malignant endometrial lesions, and in malignant lesions with different clinical and pathological features were analyzed. The correlations of the blood flow parameters (vascularization index [VI], blood flow index [FI], and vascularization-blood flow index [VFI]) of transvaginal 3D power Doppler ultrasound, and VEGF expressions, microvessel density (MVD) were also evaluated.

Results

The VEGF-positive rates and the MVD values in benign and malignant endometrial lesions were significantly different (both P<0.001). The differences of VEGF-positive rates (P < 0.001) and MVD values (P = 0.021) between type I and type II lesions of endometrial cancer were statistically significant. There was no significant difference in the VEGF-positive rate and MVD value between stage IA and IB (P=0.443, P=0.311). The difference of VEGF expression and MVD in stage IA, stage IB and stage II and above was statistically significant (P=0.003, P=0.017). The VEGF-positive rate and MVD value were not significantly different in IAG1 and IAG2 lesions of endometrioid adenocarcinoma (P=0.709, P=0.792). There was no significant correlation between VI, FI, VFI and VEGF expression and MVD in endometrial cancer.

Conclusion

The VEGF-positive rates and MVD values were relatively high in malignant endometrial lesions, type II and stage II and above lesions of type I endometrial cancer, indicating that the angiogenesis of endometrial cancer tissues might play a crucial role in the tumor classification, and pelvic metastasis.

Cytological assessment of endometrial washings obtained with Karman cannula using a liquid-based preparation method for the detection of endometrial pathologies

OBJECTIVE

The aim of this study was to evaluate the diagnostic efficacy and utility of liquid-based cytology in ThinPrep (Cytyc Corporation, Boxborough, MA) for endometrial lesions in patients presenting with abnormal uterine bleeding.

MATERIALS AND METHODS

Two hundred and thirteen women scheduled for dilatation and curettage because of abnormal uterine bleeding were enrolled in the study. After providing informed consent, all the women proceeded sequentially to endometrial cytology and then dilatation and curettage.

RESULTS

In the premenopausal group, cytological failure was 4.8%, histopathological failure was 2.4%; cytologic insufficiency in the postmenopausal group was 2.1%, and histopathologic insufficiency was 19.6%. When cytologic and histopathological sufficiency rates were compared in all cases, cytologic insufficiency was 4.2% and histopathologic insufficiency was 6.1%. This difference was statistically significant (p < 0.039). The diagnostic accuracy, sensitivity, specificity, PPV, and NPV of the liquid-based endometrial cytology for premenopausal patients were 96.79, 58.33, 97.92, 70, and 96.58%, respectively. In the postmenopausal cases, the accuracy of diagnosis of endometrial cytology was 97.30%, sensitivity 100%, specificity 96.67%, PPV 87.50%, and NPV 100%. When cytologic and histopathologically inadequate cases were excluded, no cytologic and histopathological abnormal findings were found in endometrial thickness cutoff ≤ 5 mm for all patients.

CONCLUSION

The use of liquid-based cytology with TVS may contribute to increasing the diagnostic accuracy of the test and reduce unnecessary D&C for women. When TVS is used as a triage indicator, regardless of menopausal status in ≤ 5 mm endometrial thickness cases, endometrial cytology is an absolutely reliable method for detecting cancer.