RSNA 2011 

Abstract Archives of the RSNA, 2011


LL-BRS-WE7A

Extra-Mammary Incidental Findings on Magnetic Resonance Imaging of the Breast

Scientific Informal (Poster) Presentations

Presented on November 30, 2011
Presented as part of LL-BRS-WE: Breast Imaging

Participants

Rubina Manuela Trimboli, Presenter: Nothing to Disclose
Francesco Cartia MD, Abstract Co-Author: Nothing to Disclose
Luca Alessandro Carbonaro MD, Abstract Co-Author: Research Consultant, im3D SpA
Anastasia Esseridou MD, Abstract Co-Author: Nothing to Disclose
Nicola Verardi MD, Abstract Co-Author: Nothing to Disclose
Francesco Sardanelli MD, Abstract Co-Author: Consultant, Bracco Group Research grant, Bracco Group Consultant, Bayer AG Research grant, Bayer AG
Giovanni Di Leo, Abstract Co-Author: Nothing to Disclose

PURPOSE

Our aim was to estimate the prevalence of extramammary incidental findings (EMIFs) in patients undergoing breast MRI.

METHOD AND MATERIALS

We retrospectively reviewed 74 breast MRI studies of 73 patients, aged from 24 to 87 years (mean 55 ± 14 years) performed from June 1st, 2010 to March 15th, 2011. Studies were evaluated by a radiologist with 4-year experience mainly dedicate to breast imaging. Reported EMIFs were extracted from reports. An independent observer with 5-year experience in body CT and MRI reviewed all images in order to detect EMIFs (focused assessment). Major and minor EMIFs were distinguished. The prevalence of initially reported EMIFs was compared with that obtained with focused assessment, considered as reference standard. McNemar test was used.

RESULTS

Out of 74 exams, 8 EMIFs were initially reported in 6 patients. The focused assessment resulted in 34 EMIFs in 29 patients: 2 major EMIFs (1 vertebral metastasis and 1 ascending aorta ectasia) and 32 minor EMIFs (10 liver cysts, 6 disventilatory bands, 3 hiatal hernias, 2 small pleural effusions, 2 accessory spleens, 2 pulmonary atelectasias, 1 simple renal cysts, 1 liver hemangioma, 1 focal liver enhancement, 1 rib abnormality, 1 vertebral abnormality, 1 azygous ectasia, 1 abnormal lung density). All of initially reported EMIFs were found at focused assessment. Of 74 exams, 29 presented at least one EMIF with an overall prevalence of 39% (95%CI 28%-51%). The mean frequency of EMIFs per examination was 1:9.2 at initial reporting, while it was 1:2.2 at focused assessment (P<.001). Of the total 34 EMIFs, 26 (76%) were lost at initial reporting.

CONCLUSION

There is a highly significant difference between the rate of EMIFs initially reported in routine breast imaging practice and those found at a focused assessment by a body radiologist.

CLINICAL RELEVANCE/APPLICATION

Breast radiologists should pay more attention to EMIFs during routine clinical practice.

Cite This Abstract

Trimboli, R, Cartia, F, Carbonaro, L, Esseridou, A, Verardi, N, Sardanelli, F, Di Leo, G, Extra-Mammary Incidental Findings on Magnetic Resonance Imaging of the Breast.  Radiological Society of North America 2011 Scientific Assembly and Annual Meeting, November 26 - December 2, 2011 ,Chicago IL. http://archive.rsna.org/2011/11034630.html