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

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.

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Prognostic value of magnetic resonance imaging features in low-grade gliomas

Bioscience Reports ◽

10.1042/bsr20190544 ◽

2019 ◽

Vol 39 (6) ◽

Cited By ~ 1

Author(s):

Liang Deng ◽

Liangfang Shen ◽

Lin Shen ◽

Zhao Zhao ◽

Yingpeng Peng ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Multivariate Analysis ◽

Magnetic Resonance ◽

Low Grade ◽

Imaging Features ◽

Resonance Imaging ◽

Mr Images ◽

Low Grade Gliomas ◽

Kaplan Meier ◽

Mri Features

AbstractIntroduction: The treatment strategy for low-grade gliomas (LGGs) is still controversial, and there are no standardized criteria to predict the prognosis of patients with LGGs. Magnetic resonance imaging (MRI) is a routine test for preoperative diagnosis for LGG and can reflect the destructive features for the tumor. In the present study, we aimed to explore the relationship between the MRI features and prognosis in patients with LGG.Methods: Clinical data of 80 patients with pathologically proved LGGs between January 2010 and December 2016 were analyzed retrospectively. MRI features were classified as contrast enhancement pattern (focal enhancement, diffuse enhancement and ring-like enhancement), necrosis and cysts based on the preoperative MR images. Kaplan–Meier method and multivariate analysis were performed on the data by SPSS software to explore the prognostic significance of MRI features.Results: Patients with cystic LGG had a significantly longer 5-year progression-free survival (PFS) than that with no cyst (90.9 ± 8.7 vs 65.7 ± 9.1%, P=0.045). Multivariate analysis further verified cyst as an independent prognosis factor for PFS (P=0.027, hazard ratio [HR] = 0.084). Additionally, patients with ring-like enhancement exhibited significantly longer 5-year PFS time in the Kaplan–Meier survival curves (100 vs 67.2 ± 7.7%, P=0.049). There was no significant difference in PFS and overall survival (OS) between patients with or without necrosis.Conclusion: Our study suggests that cyst formation and ring-like enhancement on preoperative MR images can be useful to predict a favorable prognosis in patients with LGGs.

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

European Oncology & Haematology ◽

10.17925/eoh.2011.07.01.24 ◽

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.

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

Frontiers in Veterinary Science ◽

10.3389/fvets.2021.778320 ◽

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.

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Magnetic Resonance Imaging in Cavitary Choroidal Melanoma

European Journal of Ophthalmology ◽

10.1177/112067210001000412 ◽

2000 ◽

Vol 10 (4) ◽

pp. 335-337 ◽

Cited By ~ 3

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.

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The Use of Endoscopic Ultrasonography and Other Imaging Modalities in the Preoperative Staging of Rectal Villous Tumours: A Case of Overstaging by Magnetic Resonance Imaging

Canadian Journal of Gastroenterology ◽

10.1155/2009/750979 ◽

2009 ◽

Vol 23 (9) ◽

pp. 639-641 ◽

Cited By ~ 1

Author(s):

Michelle Buresi ◽

Iman Zandieh ◽

Alexander G Nagy ◽

Audrey Spielmann ◽

William C Yee ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Villous Adenoma ◽

Imaging Modality ◽

Preoperative Staging ◽

Muscularis Propria ◽

Low Grade ◽

Resonance Imaging ◽

Mri Findings ◽

Meta Analyses

A case of a 60-year-old man with recurrent rectal villous adenoma is described. Preoperative staging with endoscopic ultrasound (EUS) and magnetic resonance imaging (MRI) revealed very discordant results. EUS showed a tumour present in the mucosa with no submucosal invasion, while MRI revealed invasion of the muscularis propria consistent with an invasive stage T2 carcinoma. Based on the MRI findings, the patient underwent a low anterior resection of the tumour. The surgical pathology specimen revealed a villous adenoma with low-grade dysplasia but no carcinoma and no extension into the muscularis propria. The present case highlights the uncertainty that currently exists as to which imaging modality provides the greatest accuracy in the staging of rectal cancer and in guiding the type of surgical procedure performed. Two recent meta-analyses and a systematic review of the literature point to EUS as the imaging modality of choice for determining muscularis propria and perirectal tissue invasion, as well as nodal involvement.

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Pathologic Findings of Breast Lesions Detected on Magnetic Resonance Imaging

Archives of Pathology & Laboratory Medicine ◽

10.5858/arpa.2016-0552-oa ◽

2017 ◽

Vol 141 (11) ◽

pp. 1513-1522 ◽

Cited By ~ 7

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.

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Magnetic resonance imaging findings in 11 cases of dedifferentiated endometrial carcinoma of the uterus

Japanese Journal of Radiology ◽

10.1007/s11604-020-01084-3 ◽

2021 ◽

Author(s):

Nao Kikkawa ◽

Kimiteru Ito ◽

Hiroshi Yoshida ◽

Mayumi Kobayashi Kato ◽

Yuko Kubo ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Endometrial Carcinoma ◽

Low Grade ◽

Resonance Imaging ◽

Mri Findings ◽

Intratumoral Hemorrhage ◽

Enhanced Mri ◽

Contrast Enhanced ◽

Contrast Enhanced Mri

Abstract Purpose We evaluated magnetic resonance imaging (MRI) findings of dedifferentiated endometrial carcinoma (DEC), comprising undifferentiated carcinoma and low-grade endometrioid carcinoma. Materials and methods We recruited 11 patients with pathologically proven DEC treated at our institute. We evaluated primary lesion size, location and signal intensity on MRI, and prognosis. MRI and pathological findings were compared in eight resected patients. Results Primary tumors ranged from 16 to 206 mm in diameter. DEC was located at the endometrium in 9 of the 11 patients; the remaining two patients showed diffuse involvement of the enlarged myometrium. These two patients with diffuse involvement type died within 4 months. Of the eight patients who underwent resection, seven had macroscopic intratumoral hemorrhage and six showed a high signal on T1-weighted images or low signal on T2-weighted images. Of the eight resected patients, four had tumor necrosis > 25% and tumor size > 5 cm. In these patients, necrosis appeared as nonenhanced areas on contrast-enhanced MRI. Conclusion MRI findings of DEC showed two patterns: mass-forming type and diffuse myometrial type with poor prognosis. Most patients with DEC had intratumoral hemorrhage, and large tumors (> 5 cm) had gross necrosis, which appeared as nonenhanced areas on contrast-enhanced MRI.

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Magnetic resonance imaging findings in chronic carbon monoxide intoxication

Acta Radiologica ◽

10.1080/02841850510021085 ◽

2005 ◽

Vol 46 (3) ◽

pp. 322-327 ◽

Cited By ~ 28

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.

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

Journal of Evidence Based Medicine and Healthcare ◽

10.18410/jebmh/2021/127 ◽

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

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External snapping hip: classification based on magnetic resonance imaging features and clinical correlation

Hip International ◽

10.1177/1120700020944139 ◽

2020 ◽

pp. 112070002094413

Author(s):

Chul-Ho Kim ◽

Seul Ki Lee ◽

Jun Ho Kim ◽

Pil Whan Yoon

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Soft Tissue ◽

Symptom Duration ◽

Imaging Features ◽

Resonance Imaging ◽

Mri Findings ◽

Snapping Hip ◽

Number Of Patients ◽

External Snapping Hip

Background: With the increasing sport population, the number of patients with external snapping hip (ESH) has also increased. To detect and visualise pathological soft tissue changes, magnetic resonance imaging (MRI) has been 1 of the most useful modalities. However, only limited studies have investigated MRI and its clinical value in the treatment of ESH in the past. Materials and methods: Between May 2017 and November 2018, 104 patients were diagnosed with ESH at our institution. We excluded patients who did not undergo an MRI ( n = 11), had complaint of bilateral symptom ( n = 17), were not diagnosed hip problems previously (n = 2), and were lost–follow-up within 6 months ( n = 19). After applying the exclusion criteria, 55 patients remained. We classified the patients into 2 groups according–MRI findings: tensed iliotibial band (ITB) and hypertrophied gluteus maximus (GM). We investigated the clinical findings, such as mean age, symptom duration, pain score, grading based on symptom severity, and other radiological findings such as soft tissue signal change and ITB thickness. The variables were compared between the groups. Results: Between the 2 groups defined by MRI findings, the group characterised by tense ITB showed a relatively short symptom duration than the hypertrophied GM group ( p < 0.001). No significant differences in the other variables were found between the groups. Conclusions: ESH has 2 types of MRI features. Compared with the hypertrophied GM group, the tense ITB group showed a shorter symptom duration and a more reversible status.

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