Extra-mammary findings in breast MRI
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Pierluigi Rinaldi & M. Costantini & P. Belli & M. Giuliani & E. Bufi & R. Fubelli & D. Distefano & M. Romani & L. Bonomo
- چاپ و سال / کشور: 2011
Description
Objectives Incidental extra-mammary findings in breast Magnetic Resonance Imaging (MRI) may be benign in nature, but may also represent a metastasis or another important lesion. We aimed to analyse the prevalence and clinical relevance of these unexpected findings. Methods A retrospective review of 1535 breast MRIs was conducted. Only axial sequences were reassessed. Confirmation examinations were obtained in all cases. Results 285 patients had a confirmed incidental finding, which were located in the liver (51.9%), lung (11.2%), bone (7%), mediastinal lymph nodes (4.2%) or consisted of pleural/pericardial effusion (15.4%). 20.4% of incidental findings were confirmed to be malignant. Positive predictive value for MRI to detect a metastatic lesion was high if located within the bone (89%), lymph nodes (83%) and lung (59%), while it was low if located within the liver (9%) or if it consisted of pleural/pericardial effusion (6%). The axial enhanced sequence showed superior sensitivity to unenhanced images in detecting metastatic lesions, especially if only smaller (.10 mm.) lesions were considered. Conclusions The prevalence of metastatic incidental extramammary findings is not negligible. Particular attention should be to incidental findings located within the lung, bone and mediastinal lymph nodes.
Eur Radiol DOI 10.1007/s00330-011-2183-6 Received: 15 February 2011 / Revised: 5 May 2011 / Accepted: 13 May 2011
