scholarly journals Pathologic Findings of Breast Lesions Detected on Magnetic Resonance Imaging

2017 ◽  
Vol 141 (11) ◽  
pp. 1513-1522 ◽  
Author(s):  
Seema B. Jabbar ◽  
Beverly Lynch ◽  
Stephen Seiler ◽  
Helena Hwang ◽  
Sunati Sahoo
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Sensitivity ◽  
Breast Cancer Patients ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Mri Features ◽  
Pathologic Findings ◽  
Mri Guided ◽  
Kinetic Pattern

Context.— Breast magnetic resonance imaging (MRI) is now used routinely for high-risk screening and in the evaluation of the extent of disease in newly diagnosed breast cancer patients. Morphologic characteristics and the kinetic pattern largely determine how suspicious a breast lesion is on MRI. Because of its high sensitivity, MRI identifies a large number of suspicious lesions. However, the low to moderate specificity and the additional cost have raised questions regarding its frequent use. Objectives.— To identify the pathologic entities that frequently present as suspicious enhancing lesions and to identify specific MRI characteristics that may be predictive of malignancy. Design.— One hundred seventy-seven MRI-guided biopsies from 152 patients were included in the study. The indication for MRI, MRI features, pathologic findings, and patient demographics were recorded. The MRI findings and the pathology slides were reviewed by a dedicated breast radiologist and breast pathologists. Results.— Seventy-one percent (126 of 177) of MRI-guided breast biopsies were benign, 11% (20 of 177) showed epithelial atypia, and 18% (31 of 177) showed malignancy. The vast majority (84%; 62 of 74) of MRI lesions with persistent kinetics were benign. However, 57% (17 of 30) of lesions with washout kinetics and 65% (62 of 95) of mass lesions were also benign. Conclusions.— Magnetic resonance imaging detects malignancies undetected by other imaging modalities but also detects a wide variety of benign lesions. Benign and malignant lesions identified by MRI share similar morphologic and kinetic features, necessitating biopsy for histologic confirmation.

scholarly journals Breast Magnetic Resonance Imaging of Multicentric, Multifocal and Bilateral Cancer — A Case-based Review

2011 ◽  
Vol 07 (01) ◽  
pp. 24
Author(s):  
Virginia Pérez Dueñas ◽  
María Ruíz de Gopegui Andreu ◽  
Sara Morón Hodge ◽  
Asunción Suárez Manrique ◽  
◽  
...  
Keyword(s):  
Breast Cancer ◽  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
False Positive ◽  
Breast Magnetic Resonance Imaging ◽  
Breast Mri ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Mri Features ◽  
Breast Magnetic Resonance

Multifocal or multicentric breast cancer can be difficult to detect on mammography or ultrasound, particularly in patients with dense breast tissue. A multimodality approach that includes breast magnetic resonance imaging (MRI) is indicated, particularly when conservative surgery is being considered as it is the most sensitive technique for identifying additional sites of disease. However, its influence on recurrence and survival rates has yet not been clearly established, and false-positive cases may lead to more aggressive management and treatment. Radiologists should therefore be aware of relevant breast MRI findings. Infiltrating carcinomas, contralateral unsuspected carcinomas, occult carcinomas, false-positive cases and post-chemotherapy changes. Several cases of multiple-site breast carcinomas and their corresponding mammographic, ultrasound and MRI features have been reviewed for this article, in which the definition and differences between multifocal, multicentric and contralateral breast carcinoma are explained and the most relevant imaging findings on MRI are illustrated and correlated with mammogram and ultrasound findings. Finally, the role of breast MRI in the pre-operative assessment of breast cancer is discussed.

scholarly journals 1.5 Tesla Magnetic Resonance Imaging Features of Canine Intracranial Intra-axial Hematomas

2021 ◽  
Vol 8 ◽  
Author(s):  
James Whitlock ◽  
Andrew Holdsworth ◽  
Carles Morales ◽  
Laurent Garosi ◽  
Inés Carrera
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Contrast Enhancement ◽  
Clinical Signs ◽  
Border Region ◽  
Imaging Features ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Mri Features ◽  
Mri Study

The differentiation of solitary intra-axial hematomas from hemorrhagic neoplasms based on their magnetic resonance imaging (MRI) features is challenging. The treatment and prognosis for these two disease entities are vastly different and distinction between them is often based on MRI findings alone. The aim of this study was to describe the 1.5 tesla MRI features of canine intra-axial hematomas and correlate these findings with the evolution of hemorrhages described in human brains. Retrospective evaluation of patient details, clinical signs, and MRI findings of dogs with intra-axial hematomas that were histopathologically confirmed or determined via repeat MRI study and/or resolution of neurological signs. Ten dogs met the inclusion criteria. All 10 hematoma lesions were determined to be 2–7 days in age. On MRI, all 10 hemorrhagic lesions were comprised of two distinct regions; a relatively thin T1-weighted (T1W), T2-weighted (T2W) and gradient echo (GRE) hypointense (9/10) peripheral border region and a large central region that was heterogenous but predominantly T1W, T2W and GRE hyperintense (8/10). The peripheral border region was complete in its integrity in all 10 cases on T2W and GRE sequences. Contrast enhancement was present in (6/10) hematoma lesions and was always peripheral in nature with no evidence of central enhancement associated with any of the lesions. An intra-axial hematoma should be suspected in solitary hemorrhagic space occupying lesions that have a complete hypointense peripheral rim, elicit a peripheral contrast enhancement pattern, and display the expected temporal pattern of hematoma evolution.

Magnetic Resonance Imaging in Cavitary Choroidal Melanoma

2000 ◽  
Vol 10 (4) ◽  
pp. 335-337 ◽  
Author(s):  
G. Rebolleda ◽  
M. Suárez Figueroa ◽  
F.J. Muñoz-Negrete ◽  
A. Rocamora
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Choroidal Melanoma ◽  
Solid Mass ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Nevus Of Ota ◽  
Spindle Cells ◽  
Mri Features ◽  
Magnetic Resonance Imaging Mri

Purpose To report the development of a cavitary choroidal melanoma in a patient with nevus of Ota and describe its magnetic resonance imaging (MRI) features. Patient A 66-year-old man with right oculodermal melanocytosis and an ipsilateral choroidal cavitary melanoma was seen. Diagnosis was suspected on the clinical, ultrasonographic and MRI findings. Results T1-weighted image showed a hyperintense solid mass containing hypointense cystic-like spaces delineated by hyperintense septa with respect to the vitreous. The reverse image was observed on T2-weighted images. A choroidal melanoma comprising epithelioid and spindle cells with multilocular cavities was documented histopathologically. Conclusions There may be an association between cavitary melanoma and nevus of Ota. Characteristic MRI findings could be helpful in the differential diagnosis of cavitary uveal melanoma.

scholarly journals Magnetic resonance imaging of vulvar dermatofibrosarcoma protuberans – report of a case

2013 ◽  
Vol 47 (3) ◽  
pp. 244-246 ◽  
Author(s):  
Evrim Ozmen ◽  
Güven Güney ◽  
Oktay Algin
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Soft Tissue ◽  
Dermatofibrosarcoma Protuberans ◽  
Lymph Node Involvement ◽  
Low Grade ◽  
Resonance Imaging ◽  
Mri Findings ◽  
First Case ◽  
Mri Features

Abstract Background. Dermatofibrosarcoma protuberans (DFSP) of the vulva is a rare low-grade soft tissue sarcoma. Magnetic resonance imaging (MRI) findings of vulvar DFSP were essentially unreported in the literature. Case report. We report a DFSP of vulva with its clinical, histological and MRI features. As far we know this is the first case of histologically confirmed vulvar DFSP presenting with MR images. The diagnosis of DFSP is usually made by histopathologic and clinical findings. Conclusions. MRI is useful both for the diagnosis of DFSP and following up the patients since it has high soft tissue resolution and no risk of radiation exposure. With MRI the relation to the adjacent anatomical structures, extension and depth of the tumour and possible lymph node involvement can also be demonstrated.

Magnetic resonance imaging findings in chronic carbon monoxide intoxication

2005 ◽  
Vol 46 (3) ◽  
pp. 322-327 ◽  
Author(s):  
A. C. Durak ◽  
A. Coskun ◽  
A. Yikilmaz ◽  
F. Erdogan ◽  
E. Mavili ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Carbon Monoxide ◽  
Magnetic Resonance ◽  
Cortical Atrophy ◽  
Common Finding ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Chronic Stage ◽  
Mri Features ◽  
Co Intoxication

Purpose: To define the cranial magnetic resonance imaging (MRI) features of the chronic stage of carbon monoxide (CO) poisoning in patients with and without neuropsychiatric sequelae. Material and Methods: Eight patients who had neither symptoms nor neurological sequelae and eight patients with neuropsychiatric sequelae were included in the study. Patients aged between 9 to 57 (mean 32.2 years). All patients had been comatose at initial admittance and awoke after normobaric 100% oxygen therapy within 1–7 days. In this study, the patients were being examined with routine cranial MRI between 1 and 10 years (mean 3.4 years) after exposure to CO. Results: The most common finding was bilateral symmetric hyperintensity of the white matter, which was more significant in the centrum semiovale, with relative sparing of the temporal lobes and anterior parts of the frontal lobes on T2‐weighted and FLAIR images in all patients. Cerebral cortical atrophy was seen in 10 patients; mild atrophy of cerebellar hemispheres in 8; and vermian atrophy in 11. Corpus callosum was atrophic in one patient. Bilateral globus pallidus lesions were seen in three patients. The lesions were hypointense on T1‐weighted images and hyperintense on T2‐weighted and FLAIR images. Conclusion: Patients with severe CO intoxication may develop persistent cerebral changes independently of their neuropsychiatric findings in the chronic stage. They may present with characteristic MRI findings as described here, even if asymptomatic. The history of CO exposure is therefore helpful for recognizing and interpreting the MRI findings of chronic stage CO intoxication.

scholarly journals Ultrasonography and Magnetic Resonance Imaging in Ovarian Torsion - A Retrospective Study in Hoskote

2021 ◽  
Vol 8 (11) ◽  
pp. 648-652
Author(s):  
Vinjamuri Anuradha ◽  
Prashanth Venkateswaran ◽  
Manasa Pandith P.C. ◽  
Puneet Shirbur
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Pelvic Mass ◽  
Ovarian Torsion ◽  
Free Fluid ◽  
Vascular Pedicle ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Medical College ◽  
Mri Features

BACKGROUND Ovarian torsion occurs when the ovary twists on its fibrovascular pedicle resulting in vascular compromise. Initially, there is twisting of the ovary, fallopian tube, or both structures, causing venous, lymphatic and arterial compromise with resultant ovarian oedema and adnexal enlargement. We wanted to determine the most common ultrasonography (USG) and magnetic resonance imaging (MRI) findings in surgically proven cases of ovarian torsion. METHODS We present a series of cases obtained on retrospective review of USG and MRI findings in 10 surgically proven cases of ovarian torsion between June 2018 to June 2020 in the Department of Radiology, MVJ Medical College & Research Hospital, Hoskote. RESULTS Significant enlargement of the ovary with size ranging from 5 to 15 cms with peripherally displaced follicles and free fluid in the pelvis in noted in all the patients on USG and MRI. Other common MRI features include ‘twisted vascular pedicle’ sign seen in 7 (70 %) cases, areas of haemorrhage within the ovarian stroma in 7 (70 %) cases and abnormal ovarian enhancement in 9 (90 %) cases. CONCLUSIONS Ultrasound and MRI are the main diagnostic imaging modalities prior to treatment. Improved detection and characterisation of pelvic mass contributes to better diagnostic accuracy. The most common findings in US and MRI features of ovarian torsion include ovarian enlargement with peripherally displaced follicles and free fluid in pelvis. Other common MRI features include ovarian haemorrhage, twisted vascular pedicle, abnormal ovarian enhancement and deviation of the uterus towards the same side. KEYWORDS Ovarian torsion, USG, MRI

scholarly journals Magnetic Resonance Imaging of Bacterial Meningoencephalitis in a Foal

2012 ◽  
Vol 2012 ◽  
pp. 1-4 ◽  
Author(s):  
Judit Viu ◽  
Lara Armengou ◽  
Cristian de la Fuente ◽  
Carla Cesarini ◽  
Sònia Añor ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Brain Mri ◽  
Mass Effect ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Cortical Areas ◽  
Fluid Analysis ◽  
Mri Features ◽  
Magnetic Resonance Imaging Mri

Magnetic resonance imaging (MRI) in equidae suffering meningoencephalitis (ME) has not been described. The objective of this paper is to describe brain MRI findings in a foal with bacterial ME. A five-month-old, 200 kg bwt Arabian filly was referred with a history of abnormal mental status and locomotion. The filly was recumbent and obtunded, and pupillary light reflexes were sluggish, and oculocephalic movements were normally present. Ophthalmic examination revealed bilateral optic neuritis. Hematology revealed leukocytosis and neutrophilia. Cerebrospinal fluid analysis showed neutrophilic pleocytosis with intracellular bacteria. On brain MRI, there were multifocal cortical areas of mild hyperintensity on T2-weighted images (T2WI) affecting both hemispheres. The lesions had ill-delineated margins, and there was loss of differentiation between gray and white matter. Diffuse hyperintensity was also identified in the left cerebellar cortex on T2WI. Neither mass effect nor cerebral midline shift were identified. On FLAIR images, the lesions were also hyperintense and, in some areas, they seemed to coalescence to form diffuse cortical areas of hyperintensity. The MRI findings described were similar to the MRI features described in cases of humans and small animals with ME. Brain MRI can be a useful diagnostic tool in foals and small-sized equidae with intracranial disease.

Computed Tomography and Magnetic Resonance Imaging-aided Diagnosis of Primary Essential Cutis Verticis Gyrata: A Case Report with 5-year Follow-up and Review of the Literature

2019 ◽  
Vol 15 (9) ◽  
pp. 906-910
Author(s):  
Hongzhang Zhu ◽  
Shi-Ting Feng ◽  
Xingqi Zhang ◽  
Zunfu Ke ◽  
Ruixi Zeng ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Three Dimensional ◽  
Stable Condition ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Cutis Verticis Gyrata ◽  
Essential Form ◽  
History Of ◽  
Magnetic Resonance Imaging Mri

Background: Cutis Verticis Gyrata (CVG) is a rare skin disease caused by overgrowth of the scalp, presenting as cerebriform folds and wrinkles. CVG can be classified into two forms: primary (essential and non-essential) and secondary. The primary non-essential form is often associated with neurological and ophthalmological abnormalities, while the primary essential form occurs without associated comorbidities. Discussion: We report on a rare case of primary essential CVG with a 4-year history of normal-colored scalp skin mass in the parietal-occipital region without symptom in a 34-year-old male patient, retrospectively summarizing his pathological and Computer Tomography (CT) and magnetic resonance imaging (MRI) findings. The major clinical observations on the CT and MR sectional images include a thickened dermis and excessive growth of the scalp, forming the characteristic scalp folds. With the help of CT and MRI Three-dimensional (3D) reconstruction techniques, the characteristic skin changes could be displayed intuitively, providing more evidence for a diagnosis of CVG. At the 5-year followup, there were no obvious changes in the lesion. Conclusion: Based on our observations, we propose that not all patients with primary essential CVG need surgical intervention, and continuous clinical observation should be an appropriate therapy for those in stable condition.

scholarly journals Balo’s Concentric Sclerosis Mimicking Tumor on Magnetic Resonance Imaging in a Young Patient

2021 ◽  
Vol 14 ◽  
pp. 117954762198967
Author(s):  
Van Trung Hoang ◽  
Cong Thao Trinh ◽  
Hoang Anh Thi Van ◽  
Thanh Tam Thi Nguyen ◽  
Vichit Chansomphou ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Demyelinating Disease ◽  
Management Strategies ◽  
Resonance Imaging ◽  
Mri Findings ◽  
Demyelinating Lesions ◽  
Baló’S Concentric Sclerosis ◽  
Magnetic Resonance Imaging Mri ◽  
Subcortical Regions

Balo’s concentric sclerosis (BCS) is a rare demyelinating disease known as Multiple Sclerosis (MS) lesion type III. It is a disease of the white matter of the brain characterized by a round lesion with variable concentric myelinated and demyelinated layers, appearing as “onion bulb.” We present a case of BCS and discuss the imaging findings and management strategies of this disease. A 26-y-old male developed headache, weakness, and numbness of limbs. Magnetic resonance imaging (MRI) showed concentric lamellar like demyelinating lesions at the subcortical regions. The patient’s neurological symptoms were consistent with the MRI findings.

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