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https://www.readbyqxmd.com/read/28722200/the-gibraltar-sign-an-anatomic-landmark-for-predicting-transverse-sinus-dominance-laterality-on-conventional-mri
#1
David R Pettersson, Joel D McLouth, Benjamin Addicott, Jeffrey M Pollock, Ramon F Barajas
BACKGROUND AND PURPOSE: Physiologic asymmetry of transverse sinus (TS) caliber is common and can lead to misinterpretation of magnetic resonance venography (MRV) studies of the brain. This retrospective study assesses the ability of multiple anatomic features on axial noncontrast T1-weighted images (T1WIs) of the brain to predict congenital TS dominance. METHODS: One hundred consecutively acquired combined MRI-MRV studies of the brain were reviewed. On noncontrast axial T1WI, each reviewer measured (1) inclination of the groove for the superior sagittal sinus (SSS), (2) angulation of the posterior falx, (3) laterality of the SSS flow void, and (4) laterality of the inferior-most occipital lobe...
July 19, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28721610/teaching-neuroimages-filling-out-in-cavernous-hemangioma-of-the-cavernous-sinus
#2
J Meincke, N Lützen, S Doostkam, H Urbach
No abstract text is available yet for this article.
July 18, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28721492/peristaltic-like-motion-of-the-human-fetal-right-ventricle-and-its-effects-on-fluid-dynamics-and-energy-dynamics
#3
Hadi Wiputra, Guat Ling Lim, Khong Chun Chua, R Nivetha, Sanah Merchant Soomar, Arijit Biwas, Citra Nurfarah Zaini Mattar, Hwa Liang Leo, Choon Hwai Yap
In both adult human and canine, the cardiac right ventricle (RV) is known to exhibit a peristaltic-like motion, where RV sinus (inflow region) contracts first and the infundibulum (outflow region) later, in a wave-like contraction motion. The delay in contraction between the sinus and infundibulum averaged at 15% of the cardiac cycle and was estimated to produce an intra-ventricular pressure difference of 15 mmHg. However, whether such a contractile motion occurs in human fetuses as well, its effects on hemodynamics remains unknown, and are the subject of the current study...
July 18, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28721221/pasireotide-successful-treatment-of-a-sparsely-granulated-tumour-in-a-resistant-case-of-acromegaly
#4
W K M G Amarawardena, K D Liyanarachchi, J D C Newell-Price, R J M Ross, D Iacovazzo, M Debono
The granulation pattern of somatotroph adenomas is well known to be associated with differing clinical and biochemical characteristics, and it has been shown that sparsely granulated tumours respond poorly to commonly used somatostatin receptor ligands (SRLs). We report a challenging case of acromegaly with a sparsely granulated tumour resistant to multiple modalities of treatment, ultimately achieving biochemical control with pasireotide. A 26-year-old lady presented with classical features of acromegaly, which was confirmed by an oral glucose tolerance test...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28721218/spontaneous-reossification-of-the-sella-in-transsphenoidal-reoperation-associated-with-strontium-ranelate
#5
Maria Mercedes Pineyro, Daiana Arrestia, Mariana Elhordoy, Ramiro Lima, Saul Wajskopf, Raul Pisabarro, Maria Pilar Serra
Spontaneous reossification of the sellar floor after transsphenoidal surgery has been rarely reported. Strontium ranelate, a divalent strontium salt, has been shown to increase bone formation, increasing osteoblast activity. We describe an unusual case of a young patient with Cushing's disease who was treated with strontium ranelate for low bone mass who experienced spontaneous sellar reossification after transsphenoidal surgery. A 21-year-old male presented with Cushing's features. His past medical history included delayed puberty diagnosed at 16 years, treated with testosterone for 3 years without further work-up...
2017: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/28720743/-usefulness-of-edoxaban-for-deep-cerebral-venous-sinus-thrombosis-with-hemorrhagic-infarction-a-case-report
#6
Takeo Amemiya, Toshio Uesaka, Katsuharu Kameda, Junji Uno, Shintaro Nagaoka, Yoshiaki Ikai, Hidefuku Gi
We describe a case of deep cerebral venous sinus thrombosis(DCVST)that was successfully treated by oral administration of the Xa inhibitor edoxaban. A 53-year-old man was admitted to our hospital because of a headache and undifferentiated dizziness. Computed tomography(CT)demonstrated a low-density area in the bilateral thalamus and high-density lesions in the internal cerebral veins(ICVs)and vein of Galen. Magnetic resonance imaging with diffusion-weighted images detected areas of hyperintensity in the bilateral thalamus...
July 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28720741/-transvenous-embolization-by-direct-puncture-of-the-superior-sagittal-sinus-using-indocyanine-green-icg-videoangiography-for-treatment-of-dural-arteriovenous-fistula-of-the-transverse-sigmoid-sinus-a-case-report
#7
Jo Matsuzaki, Kenichi Kono, Arisa Umesaki, Yojiro Kashimura, Hiroaki Matsumoto, Tomoaki Terada
We report a case of dural arteriovenous fistula at the left transverse sinus and sigmoid sinus(TS-dAVF), which was treated with transvenous embolization(TVE)by direct puncture of the superior sagittal sinus(SSS)under indocyanine green(ICG)fluoroscopic guidance. A 71-year-old woman presented with pulsatile tinnitus and progressive dementia. A left TS-dAVF with retrograde SSS and cortical venous reflux(Cognard type IIb)was demonstrated on cerebral angiography. The left internal jugular vein and distal portion of the right transverse sinus were occluded...
July 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28720479/interaction-between-prenatal-risk-and-infant-parasympathetic-and-sympathetic-stress-reactivity-predicts-early-aggression
#8
J Suurland, K B Van der Heijden, S C J Huijbregts, S H M Van Goozen, H Swaab
Nonreciprocal action of the parasympathetic (PNS) and sympathetic (SNS) nervous systems, increases susceptibility to emotional and behavioral problems in children exposed to adversity. Little is known about the PNS and SNS in interaction with early adversity during infancy. Yet this is when the physiological systems involved in emotion regulation are emerging and presumably most responsive to environmental influences. We examined whether parasympathetic respiratory sinus arrhythmia (RSA) and sympathetic pre-ejection period (PEP) response and recovery at six months, moderate the association between cumulative prenatal risk and physical aggression at 20 months (N=113)...
July 15, 2017: Biological Psychology
https://www.readbyqxmd.com/read/28720191/sustained-accelerated-idioventricular-rhythm-in-a-centrifuge-simulated-suborbital-spaceflight
#9
Rahul Suresh, Rebecca S Blue, Charles Mathers, Tarah L Castleberry, James M Vanderploeg
INTRODUCTION: Hypergravitational exposures during human centrifugation are known to provoke dysrhythmias, including sinus dysrhythmias/tachycardias, premature atrial/ventricular contractions, and even atrial fibrillations or flutter patterns. However, events are generally short-lived and resolve rapidly after cessation of acceleration. This case report describes a prolonged ectopic ventricular rhythm in response to high G exposure. CASE REPORT: A previously healthy 30-yr-old man voluntarily participated in centrifuge trials as a part of a larger study, experiencing a total of 7 centrifuge runs over 48 h...
August 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28719711/ct-and-mri-features-in-adult-patients-with-orbital-subperiosteal-abscess-secondary-to-paranasal-sinus-mucocele
#10
Chang-Wei Ding, Qiu-Shi Wang, Qi-Yong Guo, Jun Zhang, Zhen-Hai Wang
Orbital subperiosteal abscess (OSPA) secondary to paranasal sinus mucocele (PSM) is rare, and it may be misdiagnosed as PSM with orbital invasion or even as a malignant neoplasm. The present study explored the computed tomography (CT) and magnetic resonance imaging (MRI) features of OSPA. The cases of 13 patients with OSPA secondary to PSM were retrospectively reviewed. CT had been performed in 12, MRI in 7, and postcontrast MRI in 4. OSPA was revealed as a well-demarcated, spindle-shaped mass that was broad-based and located beneath the superior orbital wall (orbital roof) in 11 and at the medial wall in 2...
July 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28719571/mir-27b-3p-suppressed-osteogenic-differentiation-of-maxillary-sinus-membrane-stem-cells-by-targeting-sp7
#11
Wei Peng, Shuangxi Zhu, Xiang Li, Junquan Weng, Songling Chen
OBJECTIVE: To explore the critical role and function of miRNAs in the regulation of development and physiology of maxillary sinus membrane stem cell (MSMSC) osteogenesis. METHODS: Microarray analysis was performed to screen the miRNAs expression profiles during the process of MSMSC osteogenic differentiation. Quantitative real-time polymerase chain reaction was applied to verify the miRNAs expression profiles. Gain- and loss-of-function experiments were used to demonstrate that miR-27b-3p inhibited MSMSC osteoblastic differentiation...
July 14, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28719569/stress-analysis-of-zygomatic-implants-on-the-augmented-maxillary-sinus-is-it-necessary-to-graft
#12
Süleyman Kaman, Fethi Atıl, Umut Tekin, Ozkan Ozgul, Mustafa Ercument Önder, Seda Yılmaz, Hamiyet Gungor, Ismail Doruk Kocyigit
PURPOSE: Zygomatic implants are becoming an ideal therapy with advanced implant-supported prosthetic treatment for the posterior atrophic maxilla. The purpose of this study is to examine the quantity and distribution of stress, which was caused by zygomatic implants placed using intrasinus method with or without augmentation to the atrophic posterior maxilla. MATERIALS & METHODS: In this study, 3-dimensional atrophic edentulous maxilla models with and without sinus augmentation are designed with computer-aided programs...
July 17, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28718689/orbital-diffuse-large-b-cell-lymphoma-with-combined-variable-immunodeficiency
#13
Vishal S Parikh, Deepa Jagadeesh, James M Fernandez, Eric D Hsi, Arun D Singh
Common variable immunodeficiency (CVID) is a primary immunodeficiency manifesting as a reduction in the level of total immunoglobulin (Ig) G, a reduction in the level of either IgA or IgM, poor response to polysaccharide vaccine, and usually frequent infections. The association of CVID with an increased risk of malignancy, specifically lymphoma, is well known. A 63-year-old female with a past medical history significant for CVID presented with a 1-month history of dull, left eye pain with proptosis, hypoglobus, and left upper lid fullness without a discrete palpable mass...
July 18, 2017: Orbit
https://www.readbyqxmd.com/read/28718522/t2-prepared-balanced-steady-state-free-precession-bssfp-for-quantifying-whole-blood-oxygen-saturation-at-1-5t
#14
Ana E Rodríguez-Soto, Osheiza Abdulmalik, Michael C Langham, Nadav Schwartz, Hyunyeol Lee, Felix W Wehrli
PURPOSE: To establish a calibration equation to convert human blood T2 to the full range of oxygen saturation levels (HbO2 ) and physiologic hematocrit (Hct) values using a T2 -prepared balanced steady-state free precession sequence (T2 -SSFP) at 1.5T. METHODS: Blood drawn from 10 healthy donors (29.1 ± 3.9 years old) was prepared into samples of varying HbO2 and Hct (n = 79), and imaged using T2 -SSFP sequence at 37°C and interrefocusing interval τ180  = 12 ms...
July 17, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28718267/giant-haemangioma-of-nasopharynx-a-rare-case-outcome
#15
Haissan Iftikhar, Moghira Iqbaluddin Siddiqui
A 60-year-old female presented to us with a 5-year history of progressive right sided nasal obstruction and recurrent epistaxis. On examination lesion was seen in the right nostril which was firm and bled on probing. CT-scan paranasal sinuses showed a right sided lesion of nose and naso-pharnyx obstructing posterior nasal choanae. Dimensions were reported to be 9×4.1×3.8 cm. A punch biopsy was taken in operating room under general anaesthesia which resulted in profuse bleeding. Suction cautery was used to control bleeding and the nose was packed...
April 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/28717638/spatial-patterns-and-impacts-of-environmental-and-climatic-factors-on-canine-sinonasal-aspergillosis-in-northern-california
#16
Monise Magro, Jane Sykes, Polina Vishkautsan, Beatriz Martínez-López
Sinonasal aspergillosis (SNA) causes chronic nasal discharge in dogs and has a worldwide distribution, although most reports of SNA in North America originate from the western USA. SNA is mainly caused by Aspergillus fumigatus, a ubiquitous saprophytic filamentous fungus. Infection is thought to follow inhalation of spores. SNA is a disease of the nasal cavity and/or sinuses with variable degrees of local invasion and destruction. While some host factors appear to predispose to SNA (such as belonging to a dolichocephalic breed), environmental risk factors have been scarcely studied...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28717114/the-efficacy-of-isochronal-3d-mapping-based-ablation-of-ventricular-arrhythmia
#17
Masahito Suzuki, Junichi Nitta, Yosuke Hayashi, Kikou Lee, Keita Watanabe, Tatsuhiko Hirao, Nobutaka Kato, Yukihiro Inamura, Akira Sato, Masahiko Goya, Kenzo Hirao, Mitsuaki Isobe
Treatment of ventricular arrhythmias (VAs) commonly involves ablating sites showing electrograms with the earliest activity relative to the VA, but there is no threshold value for prematurity guaranteeing success. Ablation of sites with great prematurity can still result in failure.We hypothesized that isochronal map area (ISCA), derived from isochrones indicating electrogram prematurity, could help identify ablation targets in VA patients, as well as predict outcome. Specifically, we hypothesized that smaller ICSA for a given prematurity value would indicate a shallower arrhythmogenic focus leading to a higher likelihood of successful ablation...
July 14, 2017: International Heart Journal
https://www.readbyqxmd.com/read/28717092/cerebrospinal-fluid-rhinorrhea-and-subsequent-bacterial-meningitis-due-to-an-atypical-clival-fracture
#18
Rie Tohge, Makio Takahashi
Cases of cerebrospinal fluid (CSF) rhinorrhea due to clival fracture are rare. We present a case of bacterial meningitis with CSF rhinorrhea after a clival fracture. Heavily T2-weighted images showed a bone flap in the thinned clivus and fluid collection in the sphenoid sinus. CSF rhinorrhea developed at 1 month after mild trauma. The fracture may have been caused by the trauma and/or by the pressure gradient between the intracranial CSF space and the sphenoid sinus. A detailed history to identify trauma and an examination to detect bone defects in the skull base are necessary when patients present with bacterial meningitis and persistent rhinorrhea...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28717071/anti-mitochondrial-m2-antibodies-enhance-the-risk-of-supraventricular-arrhythmias-in-patients-with-elevated-hepatobiliary-enzyme-levels
#19
Hiroki Konishi, Koji Fukuzawa, Shumpei Mori, Seimi Satomi-Kobayashi, Kunihiko Kiuchi, Atsushi Suzuki, Yoshihiko Yano, Akihiro Yoshida, Ken-Ichi Hirata
Objective Supraventricular arrhythmias are commonly detected in patients with anti-mitochondrial antibody M2 (AMA-M2)-associated myopathy. However, the prevalence of supraventricular arrhythmias in unselected AMA-M2-positive patients and the impact of AMA-M2 on supraventricular arrhythmias have yet to be fully investigated. Methods We analyzed 384 patients (116 men; age, 60 [48-69] years), who underwent AMA-M2 testing following the detection of elevated hepatobiliary enzymes. Supraventricular arrhythmias involving atrial fibrillation, atrial flutter, atrial tachycardia, sick sinus syndrome, and atrial standstill were confirmed by a 12-lead electrocardiogram, 24-hour ambulatory monitoring, and physician-assigned diagnoses within the three years before and two years after the AMA-M2 test...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28717064/sildenafil-improves-heart-rate-variability-in-dogs-with-asymptomatic-myxomatous-mitral-valve-degeneration
#20
Prapawadee Pirintr, Nakkawee Saengklub, Vudhiporn Limprasutr, Suwanakiet Sawangkoon, Anusak Kijtawornrat
Myxomatous mitral valve degeneration (MMVD) causes an imbalance of sympathovagal activity resulted in poor cardiac outcomes. Phosphodiesterase-5 inhibitors have been revealed cardioprotective effect in patients with heart diseases. This study aimed to 1) compare the heart rate variability (HRV) between asymptomatic MMVD and healthy dogs and 2) assess long-term effects of sildenafil and enalapril on time- and frequency-domains analyzes. Thirty-four dogs with MMVD stage B1 or B2 and thirteen healthy dogs were recruited into the study...
July 17, 2017: Journal of Veterinary Medical Science
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