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Chinese Journal of Medical Ultrasound (Electronic Edition) ›› 2020, Vol. 17 ›› Issue (11): 1084-1089. doi: 10.3877/cma.j.issn.1672-6448.2020.11.005

Special Issue:

• Obstetric and Gynecologic Ultrasound • Previous Articles     Next Articles

Diagnostic efficiency of IOTA ADNEX model and IOTA simple rules in women with indeterminate adnexal masses

Zhenzhen Liu1, Zhimin Shi2, Zhonghui Xu1,(), Jianchu Li1, Yuxin Jiang1   

  1. 1. Department of Ultrasound Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
    2. Department of Ultrasound, Beijing Haidian District Maternal and Child Health Hospital, Beijing 100080, China
  • Received:2019-11-29 Online:2020-11-01 Published:2020-11-01
  • Contact: Zhonghui Xu
  • About author:
    Corresponding author: Xu Zhonghui, Email:

Abstract:

Objective

To evaluate the diagnostic efficiency of ADNEX (Assessment of Different NEoplasias in the adneXa) model, simple rules (SR) developed by the International Ovarian Tumor Analysis (IOTA) and subjective assessment (SA) in adnexal lesions with an unclear clinical diagnosis.

Methods

Patients who had indeterminate adnexal masses and would undergo surgical treatment were prospectively collected at the gynecological tumor clinic of Peking Union Medical College Hospital from March 2018 to August 2019. Transvaginal ultrasound, if necessary, combined with transabdominal ultrasound was conducted. Ultrasound diagnosis was made by using the IOTA-ADNEX model, SR, and SA, separately. According to the results of surgical pathology, the patients were divided into benign and malignant groups. ROC curve of the ADNEX model was plotted. The diagnostic efficiencies of IOTA-ADNEX model, SR, and SA were calculated.

Results

A total of 53 patients with 58 adnexal masses were enrolled in the study. SR was suitable for 89.7% of adnexal masses. The area under the ROC curve of the ADNEX model was 0.819 (95%CI: 0.701-0.936), the Youden index was 0.639, and the cut-off value was 36.2%. The diagnostic accuracy of the ADNEX model was 82.8%, which was higher than that of SR (69.0%) and similar to that of SA (84.5%). ADNEX model had the highest diagnostic sensitivity (87.9%), followed by SR (84.8%) and SA (81.8%). SA had the highest diagnostic specificity (88.0%), followed by ADNEX (76.0%) and SR (48.0%).

Conclusion

IOTA ADNEX model and SR are effective in the differentiation between benign and malignant adnexal masses in difficult cases.

Key words: ADNEX model, Diagnosis, Ovarian cancer, Ultrasonography

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