Magnetic resonance evaluation of adnexal masses. Acta radiologica (Stockholm, Sweden : 1987) [Acta Radiol] Journal article | | Title | Magnetic resonance evaluation of adnexal masses. | | Author(s) | Guerra A, Cunha TM, Félix A | | Institution | Department of Radiology, Hospital Pulido Valente, Lisbon, Portugal. | | Source | Acta Radiol 2008 Jul; 49(6):700-9. | | Abstract | BACKGROUND: Accurate evaluation of adnexal masses allows correct surgical procedure, avoiding unnecessary surgery.
PURPOSE: To evaluate the accuracy of magnetic resonance imaging (MRI) in the diagnosis of malignancy of adnexal lesions.
MATERIAL AND METHODS: We retrospectively reviewed the pelvic MRI scans of 161 patients with 199 surgically confirmed adnexal masses, between November 1998 and June 2005. The criteria for adnexal malignancy were contrast-enhanced solid lesions, contrast-enhanced solid components in mixed lesions (except those with low-signal-intensity solid components on T2-weighted imaging [T2WI]), contrast-enhanced papillary projections in cystic lesions (except those with low-signal-intensity papillary projections on T2WI), or septal thickness >or=3 mm. Ascites, peritoneal metastasis, and pelvic adenopathy were also regarded as criteria for malignancy.
RESULTS: On MRI evaluation, 97 adnexal lesions were malignant and 102 were non-malignant. Thirty-two percent of patients with ascites had benign lesions. Histopathologic evaluation of the adnexal lesions showed that 83 were malignant (true positives), 100 were non-malignant (true negatives), and seven were uncertain malignant potential tumors; two were false negative and seven were false positive. The MRI sensitivity and specificity for malignancy were 98% and 93%, respectively. MRI reached an accuracy of 95%, with a positive predictive value of 0.92 and a negative predictive value of 0.98 for malignant adnexal lesions. The kappa coefficient was 0.906, indicating almost perfect agreement between MRI and histological results.
CONCLUSION: MRI is an accurate method for evaluating the malignancy of adnexal lesions. | | Language | eng | | Pub Type(s) | Journal Article
| | PubMed ID | 18568564 |
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