scholarly journals Imaging features and surgery-related outcomes in intraventricular neurocysticercosis

2002 ◽  
Vol 12 (6) ◽  
pp. 1-8 ◽  
Author(s):  
Jonathan Stuart Citow ◽  
J. Patrick Johnson ◽  
Duncan Q. McBride ◽  
Mario Ammirati
Keyword(s):  
Magnetic Resonance ◽  
Mr Imaging ◽  
Computerized Tomography ◽  
Failure Rate ◽  
Treatment Algorithm ◽  
Parasitic Infection ◽  
Mass Effect ◽  
The United States ◽  
Imaging Features ◽  
Presenting Symptoms

Object Neurocysticercosis (NCC) is the most common parasitic infection of the central nervous system, and its prevalence is continuing to increase in the United States. The diagnosis of intraventricular NCC (IVNCC) may be difficult, and surgery frequently fails to resolve symptoms. A retrospective review of magnetic resonance (MR) imaging characteristics and surgery-related outcomes may improve management strategies of this disease. Methods The authors report the presentations, neuroimaging characteristics, surgical management, and outcomes of 30 patients with IVNCC treated over a 10-year period (mean follow-up period 4 years). Cysts were located in the lateral ventricles (five cases), the third ventricle (five cases), and the fourth ventricle (21 cases). One patient had lesions in both the lateral and fourth ventricles. Presenting symptoms were related to hydrocephalus or mass effect from the lesions. All patients underwent computerized tomography (CT) and MR imaging of the brain. Treatment consisted of shunt implantation or primary excision of an IVNCC lesion. Outcomes after operations and reoperations were evaluated in light of enhancement characteristics on MR imaging. Computerized tomography scanning demonstrated IVNCC lesions in 10% of cases, and MR revealed lesions in 100% of cases. In patients in whom gadolinium (Gd) enhancement of IVNCC lesions was demonstrated on MR imaging, the surgery-related failure rate was higher and patients required reoperation, and in those in whom gadolinium enhancement was absent the surgery-related failure rate was lower (64 and 19%, respectively; p < 0.0002). Conclusions Magnetic resonance imaging is superior to CT scanning for detecting IVNCC lesions. The absence of pericystic Gd enhancement on MR imaging is an indication for excision of the lesions. If pericystic enhancement is present, shunt surgery should be performed, and craniotomy reserved for treatment of those patients with symptomatic lesions secondary to mass effect. A treatment algorithm based on patient symptoms, cyst location, and MR imaging Gd enhancement characteristics is proposed.

scholarly journals Intracranial Gliomas: Association between MRI Features and Tumor Grade

2019 ◽  
Vol 8 (2) ◽  
pp. 93-99
Author(s):  
Md Rokibul Islam ◽  
KM Tarikul Islam ◽  
Moshiur Rahman ◽  
Mohammad Hossain ◽  
Raziul Haque ◽  
...  
Keyword(s):  
Mr Imaging ◽  
Contrast Enhancement ◽  
Predictive Value ◽  
Tumor Grade ◽  
Mass Effect ◽  
Low Grade ◽  
Imaging Features ◽  
Peritumoral Edema ◽  
Cross Sectional ◽  
Mri Features

Purpose: Intracranial gliomas are not uncommon in our country. The therapeutic management and prognosis in patients with gliomas depend on the reliable distinction between high and low-grade gliomas. The purpose of the present study was to determine whether any association exists between various individual MR imaging features and histopathologically determined tumor grade of intracranial gliomas. Our target was to explore whether MRI could enable correct determination the grading of gliomas which will help early diagnosis, staging, grade assessing, determining the appropriate treatment, preoperative planning for surgical resection and post operative management plan. Materials and Methods: It was a cross sectional type of observational study. This study was conducted on 44 cases of intracranial gliomas. Only patients having histopathologically proven intracranial gliomas who underwent surgery or stereotactic biopsy were considered as a study population. Results: The present study revealed that there is significant association between the MR imaging features and histopathological grading of intracranial gliomas. Contrast enhancement in MRI showed most significant (p<0.001). Other significant MR imaging features were peritumoral edema (p=0.001), tumor border definition (p=0.001), necrosis or cystic change of tumor (p=0.001) and mass effect (p=0.003). In this study preoperative MRI diagnosis was correct in 39 patients with accuracy of 88.6%. Sensitivity, specificity, positive predictive value and negative predictive value of MRI in detecting tumor grade were 86.4%, 90.9%, 90.5% and 87% respectively. Conclusion: MRI is sensitive, specific and accurate in assessing the grade of gliomas. Contrast enhancement is the most important predictor. Peritumoral edema, tumor border definition, mass effect and necrosis/cystic changes of tumor are also important indicators of tumor grade. Bang. J Neurosurgery 2019; 8(2): 93-99

scholarly journals Factors Associated with the Use of Magnetic Resonance (MR) Imaging for Cervical Brachytherapy in the United States (U.S.)

Brachytherapy ◽  
2016 ◽  
Vol 15 ◽  
pp. S55-S56
Author(s):  
Linda P. Cho ◽  
Surbhi Grover ◽  
Matthew M. Harkenrider ◽  
Christina Small ◽  
William Small ◽  
...  
Keyword(s):  
United States ◽  
Magnetic Resonance ◽  
Mr Imaging ◽  
The United States ◽  
Factors Associated

Computerized Tomography (CT) and Magnetic Resonance (MR) Imaging of Thyroid Cancer

2006 ◽  
pp. 91-94
Author(s):  
Illona M. Schmallfuss ◽  
Robert J. Amdur ◽  
Douglas B. Villaret ◽  
Ernest L. Mazzaferri
Keyword(s):  
Thyroid Cancer ◽  
Magnetic Resonance ◽  
Mr Imaging ◽  
Computerized Tomography

scholarly journals Magnetic Resonance Appearance of Pulmonary Type of Primary Small Cell Carcinoma of the Ovary: A Case Report and Literature Review

2021 ◽  
Vol In Press (In Press) ◽  
Author(s):  
Xuechao Du ◽  
Pengtao Sun ◽  
Yuan Zhao ◽  
Yuchang Yan ◽  
Zhenyu Pan
Keyword(s):  
Magnetic Resonance ◽  
Mr Imaging ◽  
Cell Carcinoma ◽  
Small Cell Carcinoma ◽  
Total Abdominal Hysterectomy ◽  
Abdominal Hysterectomy ◽  
Small Cell ◽  
Imaging Features ◽  
The Right ◽  
Carcinoma Of The Ovary

: The pulmonary type of primary small cell carcinoma of the ovary (SCCOPT) is a rare aggressive malignancy with a poor prognosis, usually occurring in postmenopausal women. Few literatures have emphasized on the magnetic resonance (MR) imaging features. In this paper, we analyze its MR imaging findings in combination with pathological manifestations. We report a case of a 51-year-old woman who presented with abdominal pain and distension. Several tumor markers were elevated. MR scan of the pelvis was performed. It revealed a heterogeneous lobulated mass with solid and cystic components originating from the right adnexa. The patient underwent total abdominal hysterectomy with bilateral salpingo-oophorectomy. Histology showed a tumor comprising areas of classical small-cell carcinoma, and SCCOPT was diagnosed based on histopathology and immunohistochemistry. SCCOPT is a rare aggressive malignancy with certain characteristic imaging features. The solid component exhibits slightly higher signal on T2-weighted imaging with fat suppression, restricted diffusion on diffusion weighted imaging (DWI) and apparent diffusion coefficient (ADC) maps, and honeycomb-like persistent enhancement. More data are needed to better understand its specific imaging manifestations.

Computerized tomography and magnetic resonance imaging features for differentiating functioning adrenal lesions from non-functioning adrenal lesions

2016 ◽  
Author(s):  
Derya Koseoglu ◽  
Mazhar Muslum Tuna ◽  
Narin Nasiroglu Imga ◽  
Bercem Aycicek Dogan ◽  
Mehtap Navdar Basaran ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Computerized Tomography ◽  
Imaging Features ◽  
Resonance Imaging

Resection of insular gliomas: the importance of lenticulostriate artery position

2008 ◽  
Vol 109 (5) ◽  
pp. 825-834 ◽  
Author(s):  
Yaron A. Moshel ◽  
Joshua D.S. Marcus ◽  
Erik C. Parker ◽  
Patrick J. Kelly
Keyword(s):  
Mr Imaging ◽  
Surgical Techniques ◽  
Brain Parenchyma ◽  
Growth Patterns ◽  
Normal Brain ◽  
Imaging Features ◽  
Mr Images ◽  
Presenting Symptoms ◽  
Group I ◽  
Neurological Morbidity

Object The object of this study was to identify characteristic preoperative angiographic and MR imaging features of safely resectable insular gliomas and describe the surgical techniques and postoperative clinical outcomes. Methods Thirty-eight patients with insular gliomas underwent transsylvian resection between 1995 and 2007. Patient demographics, presenting symptoms, pathological findings, and neurological outcomes were retrospectively reviewed. Preoperative MR imaging–defined tumor volumes were superimposed onto the preoperative stereotactic cerebral angiograms to determine whether the insular tumor was confined lateral to (Group I) or extended medially around (Group II) the lenticulostriate arteries (LSAs). Results Twenty-five patients (66%) had tumors situated lateral to the LSAs and 13 (34%) had tumors encasing the LSAs. Insular gliomas situated lateral to the LSAs led to significant medial displacement of these vessels (161 ± 39%). In 20 (80%) of these 25 cases the boundaries between tumor and brain parenchyma were well demarcated on preoperative T2-weighted MR images. In contrast, there was less displacement of the LSAs (130 ± 14%) in patients with insular gliomas extending around the LSAs on angiography. In 11 (85%) of these 13 cases, the tumor boundaries were diffuse on T2-weighted MR images. Postoperative hemiparesis or worsening of a preexisting hemiparesis, secondary to LSA compromise, occurred in 5 patients, all of whom had tumor volumes that extended medial to the LSAs. Gross-total or near-total resection was achieved more frequently in cases in which the insular glioma remained lateral to the LSAs (84 vs 54%). Conclusions Insular gliomas with an MR imaging–defined tumor volume located lateral to the LSAs on stereotactic angiography displace the LSAs medially by expanding the insula, have well-demarcated tumor boundaries on MR images, and can be completely resected with minimal neurological morbidity. In contrast, insular tumors that appear to surround the LSAs do not displace these vessels medially, are poorly demarcated from normal brain parenchyma on MR images, and are associated with higher rates of neurological morbidity if aggressive resection is pursued. Preoperative identification of these anatomical growth patterns can be of value in planning resection.

Magnetic resonance imaging of intramedullary spinal cord schwannomas

2003 ◽  
Vol 99 (1) ◽  
pp. 114-117 ◽  
Author(s):  
Cesare Colosimo ◽  
Alfonso Cerase ◽  
Luca Denaro ◽  
Giulio Maira ◽  
Romano Greco
Keyword(s):  
Spinal Cord ◽  
Magnetic Resonance ◽  
Mr Imaging ◽  
Spinal Cord Tumor ◽  
Spinal Nerve ◽  
Benign Tumors ◽  
Imaging Features ◽  
Spinal Nerve Root ◽  
Resonance Imaging ◽  
Intramedullary Spinal Cord

✓ Intramedullary spinal cord schwannomas are rare benign tumors for which resection is possible and safe. The purpose of this paper is to present the magnetic resonance (MR) imaging features in two cases of intramedullary spinal cord schwannoma to assist both neurosurgeons and pathologists in preventing misdiagnosis and resultant partial resection. The MR imaging evidence of a small- or medium-sized well-marginated intramedullary spinal cord tumor in a patient in whom no syringomyelia is present but in whom moderate edema with marked Gd enhancement can be seen should be considered in the differential diagnosis of intramedullary spinal cord schwannoma. In cases in which an associated thickened Gd-enhancing spinal nerve root is seen the diagnosis of schwannoma should be assumed.

The Diffusion of Magnetic Resonance Imagers in the United States and Worldwide

1985 ◽  
Vol 1 (3) ◽  
pp. 499-514 ◽  
Author(s):  
Earl P. Steinberg ◽  
Jane E. Sisk ◽  
Katherine E. Locke
Keyword(s):  
United States ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Mr Imaging ◽  
Medical Profession ◽  
The United States ◽  
Diagnostic Modality ◽  
X Ray ◽  
X Ray Computed ◽  
Ct Scanners

Magnetic resonance (MR) imaging is an exciting new diagnostic modality that has created tremendous interest in the medical profession. Although not unparalleled, the excitement engendered by MR imaging conjures up memories of the “CAT fever” induced by introduction of X-ray computed tomography (CT) scanners in 1973 (19).

scholarly journals Magnetic Resonance Imaging Evaluation of Spinal Infections

2020 ◽  
Vol 8 (2) ◽  
pp. 80-87
Author(s):  
Vulchi Ranjith Kumar ◽  
Rama Krishna Rao Baru
Keyword(s):  
Magnetic Resonance Imaging ◽  
Lumbar Spine ◽  
Magnetic Resonance ◽  
Mr Imaging ◽  
Diagnostic Delay ◽  
Spinal Infection ◽  
Imaging Features ◽  
Resonance Imaging ◽  
Skip Lesions ◽  
Spinal Infections

Background: The advantage of Magnetic resonance imaging include multiplanar capabilities and soft-tissue contrast resolution, which is superior to that of CT. Magnetic resonance (MR) imaging is a powerful diagnostic tool that can be used to help evaluate spinal infection and to help distinguish between an infection and other clinical conditions. Aim of the current study is to evaluate various spectrum and types of spinal infections, and discussing the role of MRI in diagnosing them and their characterization. Subjects & Methods: This Hospital-based prospective study consists 30 patients with clinically suspected spinal infections and chronic non-resolving low backache referred to the department of Radiodiagnosis in a period of 2 years. Investigations include Complete blood count, ESR, sputum analysis for acid-fast bacilli and MRI of the spine. Results: 20 cases involved the lumbar spine, of which 12 were tubercular, seven were pyogenic, and one case was actinomycosis. In total 21 tubercular cases, 12 cases involved lumbar spine (57%), 8 cases affects the thoracic spine (38%), and 1 case involves the cervical spine (P = 0.562). the incidence of spondylodiscitis is common overall in the lumbar spine. 23.8% of tubercular and 12.5 %of pyogenic cases involved more than two vertebrae. T1 hypointensity is seen in 18 cases of tuberculosis (85%), 8 cases of pyogenic (75%), and 1 case of actinomycosis (100%) (P = 0.801). 4 cases showed preservation of disc height, among which three are tubercular (75%), and 1 was actinomycosis (25%). 85 % of tubercular and 100% of pyogenic cases showed disc narrowing. 81 % of tubercular and 100 % of pyogenic cases showed disc hyperintensity. Nine cases of tuberculosis (42.9%) and 3 cases of pyogenic (37.5 %) showed epidural abscess. 26 cases showed para vertebral extension of which 18 were tubercular (69.2 %), 7 were pyogenic (26.9 %) and 1 was actinomycosis (3.8 %). 94% of tubercular and 42 % of pyogenic abscesses showed a well-defined para spinal signal in cases of paraspinal extension. 15 of the 18(83%) tuberculosis, 3 of the 7 (42%)cases of pyogenic, and 1 case of actinomycosis showed subligamentous spread along more than three vertebrae. Heterogenous enhancement was noted in 12 of the 15 (80%) tubercular cases, 1 of the 3 (33%) pyogenic cases, and 1(100%) actinomycosis case. 71% tubercular cases and 2 of 8 (25%) cases showed predominant anterior 2/3rd involvement. Grade III or more (>50%) vertebral destruction was seen in 16 tubercular (76%) and 2 pyogenic cases (25%). Six cases showed skip lesions of which 5were tubercular and 1 was pyogenic. 5 of the 21 (23.8%) tubercular and 1 of the 8 (12.5%) pyogenic cases showed skip lesions. Conclusion: Awareness of atypical MR imaging at early infectious spondylitis is important to avoid diagnostic delay and unnecessary other diagnostic procedures. Several non-infectious conditions may simulate the spinal infections. Hence It is helpful to be aware of these diseases and their MR imaging features. With these points in mind, MR imaging can be very beneficial to patients with spinal infection. 

Typical Meningioma with Atypical MR Imaging Features Masquerading Malignancy

2007 ◽  
Vol 20 (5) ◽  
pp. 541-544
Author(s):  
Hung-Wen Kao ◽  
Cheng-Yu Chen ◽  
Chun-Jen Hsueh ◽  
Chung-Ping Lo ◽  
Chun-Jung Juan ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Mr Imaging ◽  
Imaging Features ◽  
Intracranial Neoplasms ◽  
Meningeal Cysts

Meningiomas are the most common extraaxial tumors of intracranial neoplasms. They are usually benign with characteristic pathologic and imaging features. However, a histologically typical meningioma can have unusual or misleading imaging features that may not be suggestive of meningioma. Unusual imaging features such as large meningeal cysts, ring enhancement, and various metaplastic changes can be particularly misleading. Here we present a fibrous meningioma with atypical magnetic resonance (MR) imaging features in a 76-year-old woman.

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