scholarly journals iant extradural dermoid cyst in the right parietal-occipital region with obliteration of the transverse sinus

2021 ◽  
Vol 11 (3) ◽  
pp. 115-121
Author(s):  
K. A. Belozerskikh ◽  
G. Yu. Evzikov
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Dermoid Cyst ◽  
Dura Mater ◽  
Transverse Sinus ◽  
Occipital Region ◽  
Resonance Imaging ◽  
Study Objective ◽  
The Right ◽  
Parietal Bones

The study objective – to report a case of giant extradural dermoid cyst in a 48‑year-old woman; the cyst caused extensive erosion of the occipital bone and lower portions of the right parietal bone, which is quite rare.Case report. A 48‑year-old female patient was admitted to the Department of Neurosurgery, A. Ya. Kozhevnikov Clinic of Nervous System Diseases, University Clinical Hospital No. 3, I. M . Sechenov First Moscow State Medical University on 28.07.2020. In 2002, the patient noted the emergence of a 1‑cm subcutaneous formation in the right occipital region. The formation was slowly growing. On 17.12.2015, she underwent magnetic resonance imaging of the brain. It revealed a 2,5 × 4,4 × 4,0 cm extradural formation with clear contours and erosion of the occipital and right parietal bones. On 12.03.2020, she had contrast-enhanced magnetic resonance imaging, which demonstrated that the tumor was growing (its size was 3,0 × 6,4 × 5,5 cm). Magnetic resonance imaging scans also showed extensive erosion (6,4 × 5,4 cm) of the occipital and right parietal bones and obliteration of the right transverse sinus. On 28.07.2020, the patient underwent elective surgery, namely excision of the extradural dermoid cyst in the right parietooccipital region with simultaneous reconstruction of the calvarial bones using a titanium plate. The cyst capsule and its contents were completely removed. The capsule was tightly attached to the dura mater, but did not invade it. To remove small fragments of the capsule that could potentially invade the bone, we performed small marginal resection of the calvarial bones at the depth of 2–3 mm from the defect margin. After the removal of cyst capsule, well-defined furrow could be visualized on the dura mater in the projection of the obliterated transverse sinus. Five days postoperatively, the patient was discharged from hospital in satisfactory condition.Conclusion. Surgical treatment of extradural dermoid cysts implies radical removal of the tumor. Since the cyst capsule gets tightly attached to the edges of the bone defect along with bone erosion, the removal of such cysts as a single block is almost impossible. The risk of severe erosion of the skull bones caused by a dermoid cyst with extradural (and sometimes intradural) growth increases with age. Therefore, it is recommended to remove such tumors as early as possible. Patients with skull bone defects also require cranioplasty.

scholarly journals Alteration within the Hippocampal Volume in Patients with LHON Disease—7 Tesla MRI Study

2020 ◽  
Vol 10 (1) ◽  
pp. 14
Author(s):  
Cezary Grochowski ◽  
Kamil Jonak ◽  
Marcin Maciejewski ◽  
Andrzej Stępniewski ◽  
Mansur Rahnama-Hezavah
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Molecular Layer ◽  
Three Dimensional ◽  
Hippocampal Volume ◽  
7 Tesla ◽  
Diagnostic Process ◽  
Resonance Imaging ◽  
The Right

Purpose: The aim of this study was to assess the volumetry of the hippocampus in the Leber’s hereditary optic neuropathy (LHON) of blind patients. Methods: A total of 25 patients with LHON were randomly included into the study from the national health database. A total of 15 patients were selected according to the inclusion criteria. The submillimeter segmentation of the hippocampus was based on three-dimensional spoiled gradient recalled acquisition in steady state (3D-SPGR) BRAVO 7T magnetic resonance imaging (MRI) protocol. Results: Statistical analysis revealed that compared to healthy controls (HC), LHON subjects had multiple significant differences only in the right hippocampus, including a significantly higher volume of hippocampal tail (p = 0.009), subiculum body (p = 0.018), CA1 body (p = 0.002), hippocampal fissure (p = 0.046), molecular layer hippocampus (HP) body (p = 0.014), CA3 body (p = 0.006), Granule Cell (GC) and Molecular Layer (ML) of the Dentate Gyrus (DG)–GC ML DG body (p = 0.003), CA4 body (p = 0.001), whole hippocampal body (p = 0.018), and the whole hippocampus volume (p = 0.023). Discussion: The ultra-high-field magnetic resonance imaging allowed hippocampus quality visualization and analysis, serving as a powerful in vivo diagnostic tool in the diagnostic process and LHON disease course assessment. The study confirmed previous reports regarding volumetry of hippocampus in blind individuals.

Anomalous origin of the right pulmonary artery from the ascending aorta: Diagnosis by magnetic resonance imaging

1995 ◽  
Vol 18 (2) ◽  
pp. 118-121 ◽  
Author(s):  
Tae Kyoung Kim ◽  
Yeon Hyoen Choe ◽  
Hak Soo Kim ◽  
Jae Kon Ko ◽  
Young Tak Lee ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Pulmonary Artery ◽  
Ascending Aorta ◽  
Anomalous Origin ◽  
Resonance Imaging ◽  
Right Pulmonary Artery ◽  
The Right

Study of the right ventricle using magnetic resonance imaging

2012 ◽  
Vol 54 (3) ◽  
pp. 231-245 ◽  
Author(s):  
A. Capelastegui Alber ◽  
E. Astigarraga Aguirre ◽  
M.A. de Paz ◽  
J.A. Larena Iturbe ◽  
T. Salinas Yeregui
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Right Ventricle ◽  
Resonance Imaging ◽  
The Right

scholarly journals Pure epidural spinal cavernous haemangioma

2021 ◽  
Vol 12 ◽  
pp. 523
Author(s):  
Ragavan Manoharan ◽  
Jonathon Parkinson
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Surgical Excision ◽  
Cavernous Haemangioma ◽  
Case Description ◽  
Resonance Imaging ◽  
Cavernous Hemangiomas ◽  
The Right ◽  
Spinal Epidural ◽  
Progressive Paraparesis

Background: Pure epidural spinal cavernous hemangiomas (SCH) account for only 4% of all spinal epidural lesions. Our literature review identified 61 publications reporting on, a total of 175 cases in the magnetic resonance imaging era. Here, we reviewed those cases, and have added our case of what appeared to be a multifocal SCH. Case Description: A 72-year-old male presented with a progressive paraparesis attributed to a T5/T6 dorsolateral extradural mass extending into the right T5/6 foramen. Surgical excision documented the lesion, histologically, was a SCH. A second similar lesion was noted involving the left C7/T1 foramen; as the patient was asymptomatic from this lesion, and no additional biopsy was performed. The patient returned to normal neurological function within 2 months postoperatively. Conclusions: Here, a 72-year-old male presented with a pathologically confirmed T5/T6 epidural SCH and a secondary C7/T1 foraminal lesion suspected to represent a secondary focus of an epidural SCH.

scholarly journals Resting-State Functional Magnetic Resonance Imaging and Functional Connectivity Density Mapping in Patients With Optic Neuritis

2021 ◽  
Vol 15 ◽  
Author(s):  
Ke Song ◽  
Yong Wang ◽  
Mei-Xia Ren ◽  
Jiao Li ◽  
Ting Su ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Functional Connectivity ◽  
Functional Magnetic Resonance Imaging ◽  
Optic Neuritis ◽  
Resting State ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Functional Connectivity Density ◽  
The Right

Background: Using resting-state functional connectivity (rsFC), we investigated alternations in spontaneous brain activities reflected by functional connectivity density (FCD) in patients with optic neuritis (ON).Methods: We enrolled 28 patients with ON (18 males, 10 females) and 24 healthy controls (HCs; 16 males, 8 females). All subjects underwent functional magnetic resonance imaging (fMRI) in a quiet state to determine the values of rsFC, long-range FCD (longFCD), and short-range FCD (IFCD). Receiver operating characteristic (ROC) curves were generated to distinguish patients from HCs.Results: The ON group exhibited obviously lower longFCD values in the left inferior frontal gyrus triangle, the right precuneus and the right anterior cingulate, and paracingulate gyri/median cingulate and paracingulate gyri. The left median cingulate and paracingulate gyri and supplementary motor area (SMA) were also significantly lower. Obviously reduced IFCD values were observed in the left middle temporal gyrus/angular gyrus/SMA and right cuneus/SMA compared with HCs.Conclusion: Abnormal neural activities were found in specific brain regions in patients with ON. Specifically, they showed significant changes in rsFC, longFCD, and IFCD values. These may be useful to identify the specific mechanism of change in brain function in ON.

Diagnostic role of ASL-perfusion of liver in magnetic resonance imaging in assessing risk of developing portal hypertension in patients with viral hepatitis

2021 ◽  
pp. 38-43
Author(s):  
E. N. Simakina ◽  
T. G. Morozova
Keyword(s):  
Magnetic Resonance Imaging ◽  
Portal Hypertension ◽  
Magnetic Resonance ◽  
Viral Hepatitis ◽  
Prognostic Significance ◽  
Resonance Imaging ◽  
Diagnostic Role ◽  
Right Lobe ◽  
The Right

Objective. To establish the diagnostic role of ASL-perfusion of the liver in magnetic resonance imaging (MRI) in assessing the risk of portal hypertension in patients with viral hepatitis. Materials and methods. 109 patients with viral hepatitis were examined, including 69 (63.3 %) men and 40 (36.7 %) women, the average age of patients was 49.0 ± 2.3 years. All subjects (n = 109) underwent abdominal ultrasound with doppler vascular examination and clinical elastography, ASL-perfusion of the liver with MRI with an assessment of the volume of hepatic blood flow (HBF, ml/100 g/min).Results. The highest diagnostic and prognostic significance of ASL-perfusion for the liver is a targeted study of changes in the right lobe: for the right lobe, AUROC = 0.886 (95 % CI: 0.799–0.889); for the left, AUROC = 0.635 (95 % CI 0.627–0.641). The diagnostic and prognostic significance of ASLperfusion was evaluated in comparison with ultrasound with doppler vascular examination: AUROC = 0.991 (95 % CI: 0.880–0.993); AUROC = 0.801 (95 % CI: 0.776–0.804), respectively. The quantitative and qualitative characteristics of ASL – liver perfusion were evaluated.Conclusion. When performing ASL-perfusion of the liver, MRI should evaluate quantitative and qualitative criteria. Criteria for the prognosis of portal hypertension according to ASL- perfusion in MRI in patients with viral hepatitis: HBF 131–160 ml/100 g /min, red card – very high risk, HBF = 161–185 ml/100 g/min, red card – high, HBF = 40–130 ml/100 g/min, mixed card – medium; HBF = 131–160 ml/100 g/min, blue card-low risk (r = 0.883).

Progressive Spasticity With a Single Magnetic Resonance Imaging Lesion

2021 ◽  
pp. 20-21
Author(s):  
Samantha A. Banks ◽  
Eoin P. Flanagan
Keyword(s):  
Magnetic Resonance Imaging ◽  
Multiple Sclerosis ◽  
Magnetic Resonance ◽  
Oligoclonal Bands ◽  
Resonance Imaging ◽  
Fluid Analysis ◽  
Skin Cancers ◽  
Clinical Episode ◽  
History Of ◽  
The Right

A 59-year-old White man with a history of excised basal and squamous cell skin cancers was evaluated for gait difficulties. He had erectile dysfunction but no bowel or bladder dysfunction. He also reported fatigue. He began using a cane for ambulation 2 weeks before evaluation at our facility. His medications included vitamin D and sildenafil. He was a lifelong nonsmoker and had no family history of multiple sclerosis. Neurologic examination at the time of our evaluation 3 years after onset was notable for a positive Hoffman sign on the right and mild weakness of the right triceps but preserved strength elsewhere. He had a spastic gait with moderate spasticity in both lower extremities, hyperreflexic patellar and ankle jerks bilaterally, and bilateral positive Babinski sign. The remainder of the examination was essentially normal. Magnetic resonance imaging of the brain showed a single lesion at the cervicomedullary junction and medullary pyramids, more prominent on the right. There was also some accompanying atrophy that was also visible on cervical spine magnetic resonance imaging. Results of cerebrospinal fluid analysis showed a normal white blood cell count, increased protein concentration (108 mg/dL), and positive oligoclonal bands. The progressive nature of his symptoms, spinal fluid results, and lesion appearance were all consistent with a diagnosis of progressive solitary sclerosis. At the time this patient was seen, no immunomodulatory medications for progressive solitary sclerosis were approved, so no immunomodulatory medication was tried. Ongoing symptomatic management was recommended. Progressive solitary sclerosis is a rare variant of multiple sclerosis in which patients have a single central nervous system demyelinating lesion and development of motor progression attributable to that lesion. Patients can initially have a clinical episode followed by progression or can have a progressive course without an initial relapse.

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