IOTA ADNEX Model (iModel) for Ovarian Tumours

The IOTA ADNEX model calculates the probability that an adnexal mass is benign, borderline, stage I cancer, stage II-IV cancer, or a secondary metastatic tumour, using ultrasound and clinical features.

Purpose:

Differentiate between benign and malignant adnexal masses to guide surgical planning

Population:

Women with adnexal masses evaluated by ultrasound

Factors:

Age, Serum CA-125, Maximum lesion diameter, Proportion solid tissue, Number of papillary projections, More than 10 cyst locules, Acoustic shadows, Ascites, Oncology centre

Reference:

Van Calster et al., BMJ 2014