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https://www.readbyqxmd.com/read/28454245/improving-contrast-enhancement-in-magnetic-resonance-imaging-using-5-aminolevulinic-acid-induced-protoporphyrin-ix-for-high-grade-gliomas
#1
Junkoh Yamamoto, Shingo Kakeda, Tetsuya Yoneda, Shun-Ichiro Ogura, Shohei Shimajiri, Tohru Tanaka, Yukunori Korogi, Shigeru Nishizawa
Magnetic resonance imaging (MRI) with a gadolinium-based contrast agent is the gold standard for high-grade gliomas (HGGs). The compound 5-aminolevulinic acid (5-ALA) undergoes a high rate of cellular uptake, particularly in cancer cells. In addition, fluorescence-guided resection with 5-ALA is widely used for imaging HGGs. 5-ALA is water soluble, while protoporphyrin IX (PpIX) is water insoluble. It was speculated whether converting from 5-ALA to PpIX may relatively increase intracellular water content, and consequently, might enhance the T2 signal intensity in HGG...
March 2017: Oncology Letters
https://www.readbyqxmd.com/read/28449169/analysis-of-liver-tumors-using-preoperative-and-intraoperative-contrast-enhanced-ultrasound-ceus-ioceus-by-radiologists-in-comparison-to-magnetic%C3%A2-resonance-imaging-and-histopathology
#2
Severin Huf, Natascha Platz Batista da Silva, Isabel Wiesinger, Matthias Hornung, Marcus N Scherer, Sven Lang, Christian Stroszczynski, Thomas Fischer, Ernst Michael Jung
Purpose To evaluate the diagnostic significance of preoperatively and intraoperatively performed contrast-enhanced ultrasound (CEUS/IOCEUS) in the diagnosis of liver tumors in comparison to magnetic resonance imaging (MRI) and histopathology. Materials and Methods Retrospective analysis of 70/317 patients who underwent surgery for liver tumors between January 2012 and October 2015. Findings of CEUS and IOCEUS were compared to MRI. CEUS and IOCEUS were performed using multifrequency linear probes (1 - 5, 6 - 15 MHz) after bolus injection of 1 - 5 ml sulfur hexafluoride microbubbles...
May 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28444453/bizarre-soft-tissue-tumour-on-the-gluteus-muscle-a-case-report-of-spontaneous-chronic-expanding-haematoma
#3
Yasuaki Tohma, Yoshio Mii, Yasuhito Tanaka
Chronic expanding haematoma (CEH) is rare and refers to a gradually increasing haematoma that is not absorbed after surgery and trauma. This report highlights unusual mass occurring on the gluteus muscle, and the aim is to indicate the diagnostic method. It is necessary to consider the mechanism of the occurrence and to know the characters of CEH. The patient was a 51-year-old man who had noticed a soft mass on his right hip. The mass had gradually increased to 10 cm in size over the year. CT images revealed a haematoma...
April 25, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28441637/subtle-pathological-changes-in-neocortical-temporal-lobe-epilepsy
#4
Juan G Ochoa, Diana Hentgarden, Audrey Paulzak, Melissa Ogden, Richard Pryson, Markus Lamle, Walter G Rusyniak
This was a prospective observational study to correlate the clinical symptoms, electrophysiology, imaging, and surgical pathology of patients with temporal lobe epilepsy (TLE) without hippocampal sclerosis. We selected consecutive patients with TLE and normal MRI undergoing temporal lobe resection between April and September 2015. Clinical features, imaging, and functional data were reviewed. Intracranial monitoring and language mapping were performed when it was required according to our team recommendation...
April 22, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28439612/-imaging-of-the-paranasal-sinuses-and-anterior-skull-base
#5
S Greschus, F Albert, K W G Eichhorn
Due to the complex anatomy of the anterior skull base and paranasal sinuses, radiologic diagnostics in this area are challenging. Magnetic resonance imaging (MRI) and computed tomography (CT) are the primary indicated modalities. Guidelines helping to select the appropriate modality have been published by the German Society of Head and Neck Radiology and the Society of Otorhinolaryngology. The present article presents an overview of the current radiologic procedures and their optimized implementation using clinical examples...
April 21, 2017: HNO
https://www.readbyqxmd.com/read/28437550/use-of-magnetic-resonance-imaging-to-predict-quadrupled-semitendinosus-graft-diameter-in-all-inside-anterior-cruciate-ligament-reconstruction
#6
Joseph Serino, Ryan Murray, Evan H Argintar
This study was conducted to evaluate whether preoperative magnetic resonance imaging (MRI) measurements of the cross-sectional area and length of the semitendinosus tendon correlated with graft diameter. The goal of the study was to identify tendons at risk for requiring graft augmentation. The records of 140 consecutive patients undergoing anterior cruciate ligament (ACL) reconstruction between 2013 and 2016 were examined retrospectively. The study included 39 patients who underwent all-inside ACL reconstruction with a semitendinosus autograft...
April 24, 2017: Orthopedics
https://www.readbyqxmd.com/read/28437222/laparoscopic-anatomical-segment-2-segmentectomy-by-the-glissonian-approach
#7
Kit-Man Ho, Ho-Seong Han, Yoo-Seok Yoon, Jai Young Cho, Young Rok Choi, Jae Seong Jang, Seong Uk Kwon, Sungho Kim, Jang Kyu Choi
BACKGROUND: When hepatocellular carcinoma (HCC) was located in segment 2 (S2), segment-oriented hepatectomy was more beneficial than left lateral sectionectomy as this type of anatomical resection preserved the volume of the nontumor-bearing segment. Herein, we presented 2 cases (1 with video) of laparoscopic anatomical S2 segmentectomy by the Glissonian approach. METHODS: The first patient was a 69-year-old woman, who had an incidentally detected liver nodule on abdominal ultrasound for systemic surveillance for her breast cancer...
October 19, 2016: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
https://www.readbyqxmd.com/read/28435930/spinal-subdural-hematoma-a-rare-case-of-spinal-subdural-hematoma-complicating-routine-minimally-invasive-lumbar-discectomy-and-decompression-and-relevant-literature-review
#8
Chelsea C Boe, Brett A Freedman, Ravi Kumar, Kendall Lee, Robert McDonald, John Port
We present a case of apparently uncomplicated lumbar decompression and discectomy with delayed postoperative neurological deterioration secondary to subdural hematoma at the thoracolumbar level of the spinal cord. Previously described subdural hematomas have occurred spontaneously or related to iatrogenic injury. Hitherto, no case of acute postoperative subdural hematoma has been reported in the postoperative setting in the absence of known iatrogenic dural injury. A 76-year-old male with central and lateral recess spinal stenosis underwent apparently uncomplicated bilateral L3-4 and left sided L4-5 decompressive partial laminectomies and discectomy...
March 2017: Journal of Spine Surgery (Hong Kong)
https://www.readbyqxmd.com/read/28432505/3d-double-echo-steady-state-sequence-assessment-of-hip-joint-cartilage-and-labrum-at-3-tesla-comparative-analysis-of-magnetic-resonance-imaging-and-intraoperative-data
#9
Christoph Schleich, Tobias Hesper, Harish S Hosalkar, Fanni Rettegi, Christoph Zilkens, Rüdiger Krauspe, Gerald Antoch, Bernd Bittersohl
OBJECTIVES: To assess the diagnostic accuracy of a high-resolution, three-dimensional (3D) double-echo steady-state (DESS) sequence with radial imaging at 3 Tesla (T) for evaluating cartilage and labral alterations in the hip. METHODS: Magnetic resonance imaging (MRI) data obtained at 3 T, including radially reformatted DESS images and intraoperative data of 45 patients (mean age 42 ± 13.7 years) who underwent hip arthroscopy, were compared. The acetabular cartilage and labrum of the upper hemisphere of the acetabulum and the central femoral head cartilage were evaluated...
April 21, 2017: European Radiology
https://www.readbyqxmd.com/read/28429952/rare-cases-imitating-acute-appendicitis-three-case-reports-and-a-review-of-literature
#10
L Kunovsky, Z Kala, L Mitas, V Can, J Dolina, E Nemcová, L Klvacova, T Gajdosova, I Penka
Acute appendicitis with its characteristic clinical course is one of the most common diagnoses that require urgent surgery. The following three case reports present patients with symptoms typical of acute appendicitis which was, however, not confirmed intraoperatively. Preoperative CT or MRI were not requested because symptoms clearly indicated acute appendicitis. The first case describes a male patient with right-sided diverticulitis, the second case report involves a pregnant woman in 33rd week of gestation with right adnexal torsion due to a dermoid cyst, and in the last report, a case of spontaneous perforation of appendiceal mucinous neoplasm is presented...
2017: Rozhledy V Chirurgii: Měsíčník Československé Chirurgické Společnosti
https://www.readbyqxmd.com/read/28416834/-efficacy-of-transforaminal-endoscopic-nerve-root-decompression-in-the-treatment-of-degenerative-lumbar-spinal-stenosis
#11
Z R Yu, C D Li, S N Zhu, H L Sun, Y Zhao, L T Qi
OBJECTIVE: To evaluate the feasibility of transforaminal endoscopic nerve root decompression for degenerative lumbar spinal stenosis (DLSS). METHODS: From July 2011 to April 2016, 96 cases of single segment DLSS were involved. All the patients had unilateral lower extremity neurological symptoms, signs, neurogenic intermittent claudication of less than 500 m. Imaging examinations (CT or MRI) or diagnostic nerve root block confirmed single segment degeneration. The mean age was (71...
April 18, 2017: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
https://www.readbyqxmd.com/read/28416757/theranostic-imaging-of-liver-cancer-using-targeted-optical-mri-dual-modal-probes
#12
Qingshan Chen, Wenting Shang, Chaoting Zeng, Kun Wang, Xiaoyuan Liang, Chongwei Chi, Xiao Liang, Jian Yang, Chihua Fang, Jie Tian
The accurate preoperative detection and intraoperative navigation afforded by imaging techniques have had significant impact on the success of liver cancer surgeries. However, it is difficult to achieve satisfactory performance in both diagnosis and surgical treatment processes using any single modality imaging method. Here, we report the synthesis and characteristics of a novel dual-modality magnetic resonance imaging (MRI) and near-infrared fluorescence (NIRF) probe and verify its feasibility in nude mouse models with liver cancer...
February 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28393415/the-insertion-of-electrodes-in-the-brain-for-electrophysiological-recording-or-chronic-stimulation-is-not-associated-with-any-biochemically-detectable-neuronal-injury
#13
Marios S Themistocleous, Damianos E Sakas, Efstathios Boviatsis, George Tagaris, Andreas Kouyialis, Christina Psachoulia, Pantelis Stathis
OBJECTIVE: The aim of this study was to evaluate the degree of brain tissue injury that could be potentially induced by the introduction of a) microrecording electrodes, b) macrostimulation electrodes, or c) chronic stimulation electrodes. We aimed to evaluate whether the use of five simultaneous microrecording tracks is associated with any brain injury not detectable by conventional imaging such as CT or MRI. MATERIALS AND METHODS: The study included 61 patients who underwent surgery for implantation of 121 DBS leads...
April 10, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28391021/implantation-of-responsive-neurostimulation-for-epilepsy-using-intraoperative-ct-technical-nuances-and-accuracy-assessment
#14
Mena G Kerolus, Ryan B Kochanski, Marvin Rossi, Michael Stein, Richard W Byrne, Sepehr Sani
INTRODUCTION: Implantation of responsive neurostimulation (RNS) system has been previously discussed in the literature but there is a paucity of data on target accuracy and the use of intraoperative imaging. We describe our experience with eight patients using intraoperative computed tomography (iCT) during implantation of the NeuroPace(®) RNS system. METHODS: A frame based system was used. CT images were obtained and merged with preoperative MRI and metabolic imaging studies to calculate target coordinates...
April 5, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28387614/reduction-of-atlantoaxial-dislocation-prevented-by-pathological-position-of-the-transverse-ligament-in-fixed-irreducible-os-odontoideum-operative-illustrations-and-radiographic-correlates-in-41-patients
#15
Brian J Dlouhy, Bruno A Policeni, Arnold H Menezes
OBJECTIVE Os odontoideum (OO) is a craniovertebral junction (CVJ) abnormality in which an ossicle (small bone) is cranial to a hypoplastic dens by a variable gap. This abnormality can result in instability, which may be reducible or irreducible. What leads to irreducibility in OO is unclear. Therefore, the authors sought to better understand the causes of irreducibility in OO. METHODS A retrospective review was conducted, which identified more than 200 patients who had undergone surgical treatment for OO between 1978 and 2015 at the University of Iowa Hospitals and Clinics...
April 7, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28387150/improving-acl-reconstruction-outcomes
#16
Kevin E Wilk, Kurt P Spindler, Eric McCarty, Dustin Grooms, Karin Grävare Silbernagel
Anterior cruciate ligament (ACL) reconstruction is a common and predominantly successful surgical intervention. But are there specific preoperative patient characteristics or intraoperative surgeon decisions that lead to better or worse outcomes? And can understanding brain function changes of patients after ACL reconstruction reveal insights into the ways that postsurgical rehabilitation can be improved to further enhance outcomes? These intriguing and clinically applicable questions are addressed in this webinar titled "Improving ACL Reconstruction Outcomes," hosted jointly by JOSPT and JBJS...
March 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28362960/ipsilateral-motor-innervation-discovered-incidentally-on-intraoperative-monitoring-a-case-report
#17
Jerry Ku, Daniel Mendelsohn, Jason Chew, Jason Shewchuk, Charles Dong, Ryojo Akagami
BACKGROUND AND IMPORTANCE: Lesions in the corticospinal tract above the decussation at the medullary pyramids almost universally produce contralateral deficits. Rare cases of supratentorial lesions causing ipsilateral motor deficits have been reported previously, but only ever found secondary to stroke or congenital pyramidal tract malformations. CLINICAL PRESENTATION: Herein, we report a case of ipsilateral corticospinal tract innervation discovered incidentally with intraoperative monitoring during a microsurgical resection of a vestibular schwannoma...
March 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28361831/evolving-management-of-insulinoma-experience-at-a-tertiary-care-centre
#18
Viveka P Jyotsna, Sujoy Pal, D Kandasamy, S Gamanagatti, P K Garg, N Raizada, Peush Sahni, C S Bal, N Tandon, A C Ammini
BACKGROUND & OBJECTIVES: Since our previous study in 2006, several new modalities for localization of cause of endogenous hyperinsulinemic hypoglycaemia such as multiphasic computed tomography (CT), multiphasic magnetic resonance imaging (MRI), endoscopic ultrasound (EUS), intraoperative ultrasound, and intra-arterial calcium infusion with arterial stimulation venous sampling (ASVS) have become available. Therefore, to evaluate the relative usefulness of various imaging modalities to guide future management in terms of diagnosis and patient care, we analyzed presentation and management of patients of endogenous hyperinsulinemic hypoglycaemia...
November 2016: Indian Journal of Medical Research
https://www.readbyqxmd.com/read/28361365/acute-non-traumatic-idiopathic-spinal-subdural-hematoma-radiographic-findings-and-surgical-results-with-a-literature-review
#19
Kazuyoshi Kobayashi, Shiro Imagama, Kei Ando, Yoshihiro Nishida, Naoki Ishiguro
PURPOSE: Intraspinal hematoma is a serious condition, and early diagnosis is necessary to permit emergency treatment. Among such hematomas, non-traumatic spinal subdural hematoma is a rare occurrence. We have experienced three patients with surgically proven subdural spinal hematoma, and here we report these cases with a review of their clinical and imaging characteristics. METHODS: All three cases were idiopathic with no history of disease, no coagulopathy, and no trauma...
March 30, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28359922/first-application-of-7t-magnetic-resonance-imaging-in-endoscopic-endonasal-surgery-of-skull-base-tumors
#20
Thomas F Barrett, Hadrien A Dyvorne, Francesco Padormo, Puneet S Pawha, Bradley N Delman, Raj K Shrivastava, Priti Balchandani
BACKGROUND: Successful endoscopic endonasal surgery for the resection of skull base tumors is reliant on preoperative imaging to delineate pathology from the surrounding anatomy. The increased signal-to-noise ratio afforded by 7T MRI can be used to increase spatial and contrast resolution, which may lend itself to improved imaging of skull base. In this study, we apply a 7T imaging protocol to patients with skull base tumors and compare the images to clinical standard of care. METHODS: Images were acquired at 7T on 11 patients with skull base lesions...
March 27, 2017: World Neurosurgery
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