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Jul 2018, Vol 6, Issue 3
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Original Article
Accuracy of Imaging in Preoperative Local Staging of Endometrial Cancer: Could Imaging Predict Low Risk Patients?
Maryam Rahmani1, Samira Heydari1, Azamsadat Mousavi2, Nasrin Ahmadinejad1, Shilan Azhdeh1, Majid Shakiba1
1Department of Radiology, Advanced Diagnostic and Interventional Radiology Research Center, Tehran University of Medical Sciences, Tehran, Iran
2Department of Oncology and Gynecology, Tehran University of Medical Sciences, Tehran, Iran

IJWHR 2018; 6: 363-368
DOI: 10.15296/ijwhr.2018.59
Viewed : 686 times
Downloaded : 553 times.

Keywords : Endometrial cancer, Transvaginal sonography, Doppler ultrasonography, Magnetic resonance imaging, Myometrial invasion
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Abstract
Objectives: In this study we aimed to evaluate diagnostic accuracy of magnetic resonance imaging (MRI) and transvaginal sonography (TVS) in identifying the depth of myometrial invasion and cervical involvement and also their relationship with the uterine arteries resistance index (RI) and pulsatility index (PI) in endometrial carcinoma.

Materials and Methods: We performed a prospective study on 45 women with histologically confirmed diagnosis of endometrial carcinoma. The study was performed from October 2009 to December 2012. All the patients were evaluated by 3T MRI and TVS and transvaginal color Doppler sonography of uterine arteries. All the patients underwent hysterectomy and the result of imaging and pathologic studies were compared.

Results: Mean age was 54.5 ± 10.8 years (33 to 77 years), mean gravid was 3.93 ± 2.8 and the mean parity was 3.9 ± 2.5. The pathology results indicated 29 patients (64.4%) in stage IA and 16 patients (35.6%) in stage IB. Mean endometrial thickness in stage IA patients was 18.4±14.4 mm and in stage IB patients was 38.5±11.5 mm. TVS also showed positive predictive value (PPV) of 76.5%, negative predictive value (NPV) of 88.9%, sensitivity of 81.3%, specificity of 85.7%, and accuracy of 84.1% for assessment of the depth of myometrial invasion in endometrial carcinoma. We found PPV of 86.7%, NPV of 92.3%, sensitivity of 86.7%, specificity of 92.3%, and accuracy of 90.2% for MRI study.

Conclusions: TVS can evaluate the depth of myometrial invasion with an acceptable accuracy when MRI is not available or cost-effective, or when MRI is contraindicated. Both preoperative MRI and TVS can predict low risk patients (less than 50% of myometrial invasion) accurately; thereby avoiding lymphadenectomy in these patients.

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