Clear Depiction of Inflammatory Abdominal Aortic Aneurysm with Diffusion-Weighted Magnetic Resonance Imaging

Kılıçkesmez, Kadriye Orta; Kılıçkesmez, Özgür

doi:10.1007/s00270-009-9528-4

Cited by 7 publications

(4 citation statements)

References 13 publications

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“…DWI sequences are increasingly used for the evaluation of other extracranial diseases and can be added to abdominal MRI protocols without relevant prolongation of the examination time (10)(11)(12)(13)(14). In the retroperitoneum DWI allowed the clear delineation of an inflammatory abdominal aortic aneurysm (19). Nakayama et al (20) found significantly different ADC values between malignant and benign retroperitoneal le-sions with lower values for lymphoma and carcinoma.…”

Section: Discussionmentioning

confidence: 99%

Diffusion-weighted MRI findings of treated and untreated retroperitoneal fibrosis

Kamper¹,

Brandt²,

Ekamp³

et al. 2014

Diagn Interv Radiol

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M agnetic resonance imaging (MRI) is a widely used diagnostic tool for breast imaging in daily practice, with its high sensitivity to detect primary, recurrent, and residual breast cancer. Breast MRI serves as a reliable problem-solving tool in case of inconclusive mammography and ultrasonography (US) findings. It can be used to monitor the results of neoadjuvant chemotherapy and it may also contribute to preoperative evaluation of known lesions. With increasing use of MRI, number of breast lesions visible only on MRI and need for MRI-guided breast biopsy have increased (1). Second-look US can also be used for re-evaluation of these lesions; because US-guided biopsy is an easier, cheaper, and faster method if these lesions are visible on second-look US. According to a recently published meta-analysis, lesion detection rates with second-look US are variable in the literature (22.6%-82.1%). Mass lesions and malignant lesions were more likely to be detected at second-look US; average detection rates were 66% for masses, 29% for non-mass-like enhancement (NME) (2, 3). However, focal or NME lesions, which are less detectable than masses on second-look US, require MRI-guided biopsy in the majority of cases. According to the MRI-guided biopsy series in the literature, approximately 25%-35% of these lesions are diagnosed as malignant (4-9).Within this context, the aim of the present study is to assess the effectiveness of MRI-guided 10 Gauge (G) vacuum-assisted breast biopsies (VABB) performed at our institution and to examine the relationship between lesion characteristics and histopathologic results. B R E A S T I MAG I N G O R I G I N A L A R T I C L E PURPOSEWe aimed to assess the effectiveness of magnetic resonance imaging (MRI)-guided vacuum-assisted breast biopsy (VABB), evaluate and compare the characteristics and histopathologic findings of lesions, and overview the follow-up results of benign lesions. METHODSMRI findings and histopathologic results of breast lesions biopsied by MRI-guided VABB between 2013 and 2016 were retrospectively analyzed. MRI findings closely related with malignancy were investigated in particular. Follow-up results of benign lesions were evaluated. RESULTSMRI-guided VABB was applied to 116 lesions of 112 women. Of the lesions, 75 (65%) were benign, while 41 (35%) were malignant. Segmental (94%), clustered (89%), and clustered ring (67%) nonmass-like enhancement patterns were found to be more related with malignancy. False-negative rate of MRI-guided VABB was 12%, underestimation rate was 21%. One of the 54 followed-up benign lesions had a malignant result. CONCLUSION MRI-guided VABB is a reliable method for the diagnosis of breast lesions that are positive only on MRI. Follow-up results show that cancer detection rate is low for radio-pathologically concordant lesions. Further multicenter studies with larger patient population are needed to elucidate these results.You may cite this article as: Taşkın F, Soyder A, Tanyeri A, Öztürk VS, Ünsal A. Lesion characteristics, histopathologic r...

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Section: Discussionmentioning

confidence: 99%

Diffusion-weighted MRI findings of treated and untreated retroperitoneal fibrosis

Kamper¹,

Brandt²,

Ekamp³

et al. 2014

Diagn Interv Radiol

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“…Contrast-enhanced sequences allow the depiction of the perfused lumen (Fig 11) or a covered rupture by demonstrating contrast agent extravasation in the area of the aneurysmal sac (46). In an initial case report, investigators have suggested that diffusion-weighted imaging sequences allow differentiation of the cause of the aneurysm (47).…”

Section: Symptomatic Abdominal Aortic Aneurysmmentioning

confidence: 99%

MR Imaging for Acute Lower Abdominal and Pelvic Pain

Heverhagen

Klose²

2009

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Acute lower abdominal and pelvic pain is a frequent complaint of patients in the emergency room. Usually, the condition of these patients is assessed with computed tomography (CT) and ultrasonography (US). However, the need to reduce radiation doses of as much as 20 mSv at CT, especially in younger patients and possibly pregnant patients, and the operator dependence of US have led to an increased use of magnetic resonance (MR) imaging to assess those patients. MR imaging shows high accuracy in these patients and can be used to establish an accurate diagnosis quickly and reliably. A short imaging protocol of about 10 minutes, without the use of an intravenous contrast agent in most cases, allows investigation of these patients. The basic imaging protocol that localizes the diseased anatomic region needs to be complemented by focused anatomic imaging of the diseased area. Although MR imaging might not be the modality of choice for all patients, it may be beneficial for a subset of patients for whom CT is not warranted (pregnant patients or young patients) and US findings are inconclusive. In patients with acute abdominal and pelvic pain, the range of diseases and disorders that can be diagnosed with MR imaging is extremely broad. Therefore, MR imaging should be considered as an excellent imaging modality for the evaluation of these patients.

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“…69 MR imaging also may show diffusion restriction within the inflamed retroperitoneum, but this finding is nonspecific and should be correlated with ancillary imaging findings and followed closely to exclude an underlying malignancy. 70 Posterior aortic wall involvement, a lobular mass, and anterior displacement of the aorta from the adjacent vertebrae are features that suggest a retroperitoneal mass rather than an inflammatory aneurysm. 14,71 In addition, PET-CT may show increased FDG uptake within the wall of an inflammatory AAA.…”

Section: Inflammatory Aneurysmmentioning

confidence: 99%