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https://www.readbyqxmd.com/read/28743180/factors-predictive-of-occult-nipple-areolar-complex-involvement-in-patients-with-carcinoma-in-situ-of-the-breast
#1
Hyeoseong Hwang, Seho Park, Ja Seung Koo, Hyung Seok Park, Seung Il Kim, Young Up Cho, Byeong-Woo Park, Jung Hyun Yoon, Min Jung Kim, Eun-Kyung Kim
OBJECTIVES: To investigate predictors of occult nipple-areolar complex (NAC) involvement in patients with carcinoma in situ (CIS) and to validate an online probability calculator (CancerMath; www.lifemath.net/cancer/breastcancer/nipplecalc/index.php). METHODS: Mastectomized patients with CIS (n = 104) were retrospectively selected. Clinicopathology and preoperative mammography, ultrasound, and magnetic resonance imaging (MRI) findings were analyzed. RESULTS: Histopathological NAC-positivity was confirmed in 20 (19...
July 25, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28742383/role-of-mri-in-the-use-of-an-absorbable-hydrogel-spacer-in-men-undergoing-radiation-therapy-for-prostate-cancer-what-the-radiologist-needs-to-know
#2
Alison D Sheridan, Sameer K Nath, Steffen Huber, Sarah Rosasco, Jeffrey C Weinreb, Gary M Israel
OBJECTIVE: Hydrogel spacers have a novel role in the treatment of low- and intermediate-risk prostate cancer with dose-escalated radiation therapy. Given the growing number of patients undergoing treatment with radiation therapy, the use of hydrogel spacers is expected to increase. The purpose of this article is to review what a radiologist needs to know about the imaging of hydrogel spacers, including MRI technique and appearance on CT and MRI. CONCLUSION: MRI has a critical role in the evaluation of hydrogel spacer placement and is used to facilitate contouring by the radiation oncologist...
July 25, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28742376/hypervascular-transformation-of-hypovascular-hypointense-nodules-in-the-hepatobiliary-phase-of-gadoxetic-acid-enhanced-mri-a-systematic-review-and-meta-analysis
#3
Chong Hyun Suh, Kyung Won Kim, Junhee Pyo, Jayoun Lee, So Yeon Kim, Seong Ho Park
OBJECTIVE: The purpose of this study is to evaluate the outcomes of hypovascular hypointense nodules in the hepatobiliary phase of gadoxetic acid-enhanced MRI and the risk factors for the hypervascular transformation of the nodules through a systematic review and meta-analysis. MATERIALS AND METHODS: We searched the Ovid-MEDLINE and EMBASE databases for published studies of hypovascular hypointense nodules in patients with chronic liver disease. The pooled proportions of the overall and cumulative incidence rates at 1, 2, and 3 years for the transformation of hypovascular hypointense nodules into hypervascular hepatocellular carcinomas (HCCs) were assessed by using random-effects modeling...
July 25, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28742373/utility-of-mri-to-differentiate-clear-cell-renal-cell-carcinoma-adrenal-metastases-from-adrenal-adenomas
#4
Nicola Schieda, Satheesh Krishna, Matthew D F McInnes, Bardia Moosavi, Abdulmohsen Alrashed, Robert Moreland, Evan S Siegelman
OBJECTIVE: The purpose of this study is to compare MRI features of clear cell renal cell carcinoma (RCC) adrenal metastases and adenomas. MATERIALS AND METHODS: Fifteen clear cell RCC adrenal metastases imaged with MRI were compared to 29 consecutive adenomas between 2006 and 2015. Two blinded radiologists assessed homogeneity (homogeneous vs heterogeneous), signal intensity (SI) decrease on chemical-shift MRI, and T2-weighted SI (isointense, mildly hyperintense, or markedly hyperintense) relative to muscle...
July 25, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28742278/agenesis-of-the-corpus-callosum-developmental-delay-autism-spectrum-disorder-facial-dysmorphism-and-posterior-polymorphous-corneal-dystrophy-associated-with-zeb1-gene-deletion
#5
Ayeshah Chaudhry, Brian H Chung, Dimitri J Stavropoulos, Marcela P Araya, Asim Ali, Elise Heon, David Chitayat
We report on a girl diagnosed prenatally with agenesis of the corpus callosum (ACC) on fetal ultrasound and MRI. On postnatal follow-up she was noted to have developmental delay, facial dysmorphism, autism spectrum disorder, and posterior polymorphous corneal dystrophy (PPD). Array-comparative genomic hybridization analysis (Array-CGH) showed a 2.05 Mb de novo interstitial deletion at 10p11.23p11.22. The deleted region overlaps 1 OMIM Morbid Map gene, ZEB1 (the zinc finger E-box binding homeobox transcription factor 1), previously associated with posterior polymorphous corneal dystrophy type 3 (PPCD3)...
July 25, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28742248/biallelic-col3a1-mutations-result-in-a-clinical-spectrum-of-specific-structural-brain-anomalies-and-connective-tissue-abnormalities
#6
Denise Horn, Eberhard Siebert, Ulrich Seidel, Imma Rost, Karin Mayer, Rami Abou Jamra, Diana Mitter, Uwe Kornak
Vascular Ehlers-Danlos syndrome (type IV) is an autosomal dominant disorder caused by heterozygous variants of COL3A1. We identified biallelic COL3A1 variants in two unrelated families. In a 3-year-old female with developmental delay the nonsense variant c.1282C>T, p.(Arg428*) was detected in combination the c.2057delC, p.(Pro686Leufs*105) frame shift variant. Both compound heterozygous variants were novel. This patient was born with bilateral clubfoot, joint laxity, and dysmorphic facial features. At the age of 2 years she developed an aneurysmal brain hemorrhage...
July 25, 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28742195/the-use-of-susceptibility-weighted-imaging-to-detect-cerebral-microbleeds-after-lacunar-infarction
#7
L Shao, M Wang, X-H Ge, H-D Huang, L Gao, J-C Qin
OBJECTIVE: To study the value of susceptibility-weighted imaging (SWI) technology to detect cerebral microbleeds (CMBs) in senile cerebral lacunar infarction patients; and to evaluate the complicated cerebral hemorrhage risk after patients with CMBs took aspirin, an antiplatelet medication or received anticoagulant therapy. PATIENTS AND METHODS: MRI scanning, using GRE-T2*WI, SWI and FSE sequences (T1WI, T2WI, and T2FLAIR), was performed on the three groups: (1) a cerebral lacunar infarction group; (2) cerebral lacunar infarction with cerebral microbleeds (CMBs) group; and (3) a healthy elderly group...
July 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28742099/variants-of-acan-are-associated-with-severity-of-lumbar-disc-herniation-in-patients-with-chronic-low-back-pain
#8
Romain Shanil Perera, Poruwalage Harsha Dissanayake, Upul Senarath, Lalith Sirimevan Wijayaratne, Aranjan Lional Karunanayake, Vajira Harshadeva Weerabaddana Dissanayake
INTRODUCTION: Disc herniation is a complex spinal disorder associated with disability and high healthcare cost. Lumbar disc herniation is strongly associated with disc degeneration. Candidate genes of the aggrecan metabolic pathway may associate with the severity of lumbar disc herniation. OBJECTIVES: This study evaluated the association of single nucleotide variants (SNVs) of the candidate genes of the aggrecan metabolic pathway with the severity of lumbar disc herniation in patients with chronic mechanical low back pain...
2017: PloS One
https://www.readbyqxmd.com/read/28741987/multimodal-characterization-of-gray-matter-alterations-in-neuromyelitis-optica
#9
Yaou Liu, Xueyan Jiang, Helmut Butzkueven, Yunyun Duan, Jing Huang, Zhuoqiong Ren, Huiqing Dong, Fu-Dong Shi, Frederik Barkhof, Kuncheng Li, Jinhui Wang
OBJECTIVE: To investigate structural and functional alterations of gray matter (GM) and examine their clinical relevance in neuromyelitis optica (NMO) using multimodal magnetic resonance imaging (MRI) techniques. METHODS: A total of 35 NMO and 36 healthy controls (HC) were recruited in this study. Cortical lesions were investigated by double inversion recovery technique. Five voxel-wise MRI measurements were obtained for each participant in the GM including gray matter volume (GMV), fractional anisotropy (FA), mean diffusivity (MD), amplitude of low-frequency fluctuation (ALFF), and weighted functional connectivity strength (wFCS)...
July 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28741799/multicenter-study-for-brain-body-hypothermia-for-hie-investigation-of-changes-in-hmgb-1
#10
Toshihiko Nakamura, Hideomi Asanuma, Satoshi Kusuda, Ken Imai, Shigeharu Hosono, Ryota Kato, Satoshi Suzuki, Kyoko Yokoi, Minoru Kokubo, Shingo Yamada, Takashi Kamohara
BACKGROUND: We measured changes in the blood levels of high mobility group box-1 (HMGB-1) at 24-hour intervals in neonates treated with brain/body hypothermia (BHT) for hypoxic ischemic encephalopathy (HIE), to evaluate the usefulness of HMGB-1 levels for determining outcomes. METHODS: We studied 15 neonates with HIE who underwent BHT (BHT (+) group) and 6 neonates with HIE who did not (BHT (-) group). We recorded HMGB-1 changes at 24-hour intervals, creatinine phosphokinase (CK), and the resistance index of the anterior cerebral artery (ACA-RI)...
July 25, 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28741714/abnormal-fronto-parietal-white-matter-organisation-in-the-superior-longitudinal-fasciculus-branches-in-autism-spectrum-disorders
#11
Jacqueline Fitzgerald, Alexander Leemans, Elizabeth Kehoe, Erik O'Hanlon, Louise Gallagher, Jane McGrath
Core features of ASD may be underpinned by disrupted functional and structural neural connectivity. Abnormal fronto-parietal functional connectivity has been widely reported in the literature; this may be underpinned by disrupted microstructural organisation of white matter. The Superior Longitudinal Fasciculus (SLF) is a major fronto-parietal white matter tract, the structure of which has been little studied in ASD. The fronto-parietal projections of this tract (SLF I, II and III) are thought to play an important role in a number of cognitive functions including attention and visuospatial processing...
July 25, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28741694/reduced-parahippocampal-volume-and-psychosis-symptoms-in-alzheimer-s-disease
#12
Emma McLachlan, Jennifer Bousfield, Robert Howard, Suzanne Reeves
OBJECTIVE: Establishing structural imaging correlates of psychosis symptoms in Alzheimer's disease (AD) could localise pathology and target symptomatic treatment. This study investigated whether psychosis symptoms are associated with visuoperceptual or frontal networks, and whether regional brain volume differences could be linked with the paranoid (persecutory delusions) or misidentification (misidentification phenomena and/or hallucinations) subtypes. METHODS: A total of 104 patients with probable AD (AddNeuroMed; 47 psychotic, 57 non-psychotic), followed up for at least one year with structural MRI at baseline...
July 25, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28741672/finding-of-increased-caudate-nucleus-in-patients-with-alzheimer-s-disease
#13
K Persson, V D Bohbot, N Bogdanovic, G Selbaek, A Braekhus, K Engedal
OBJECTIVES: A recently published study using an automated MRI volumetry method (NeuroQuant®) unexpectedly demonstrated larger caudate nucleus volume in patients with Alzheimer's disease dementia (AD) compared to patients with subjective and mild cognitive impairment (SCI and MCI). The aim of this study was to explore this finding. MATERIALS & METHODS: The caudate nucleus and the hippocampus volumes were measured (both expressed as ratios of intracranial volume) in a total of 257 patients with SCI and MCI according to the Winblad criteria and AD according to ICD-10 criteria...
July 25, 2017: Acta Neurologica Scandinavica
https://www.readbyqxmd.com/read/28741638/-19-f-cest-imaging-probes-for-metal-ion-detection
#14
Qiaoli Peng, Yaping Yuan, Huaibin Zhang, Shaowei Bo, Yu Li, Shizhen Chen, Zhigang Yang, Xin Zhou, Zhong-Xing Jiang
For detecting metal ions with (19)F chemical exchange saturation transfer magnetic resonance imaging ((19)F CEST MRI), a class of novel fluorinated chelators with diverse fluorine contents and chelation properties were conveniently synthesized on gram scales. Among them, a DTPA-derived chelator with high sensitivity and selectivity was identified as a novel (19)F CEST imaging probe for simultaneously detecting multiple metal ions.
July 25, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28741596/the-response-of-mri-contrast-parameters-in-i-in-vitro-i-tissues-and-tissue-mimicking-phantoms-to-fractionation-by-histotripsy
#15
Steven Paul Allen, Eli Vlaisavljevich, Jiaqi Shi, Luis Hernandez-Garcia, Charles A Cain, Zhen Xu, Timothy L Hall
Histotripsy is a non-invasive, focused ultrasound lesioning technique that can ablate precise volumes of soft tissue using a novel mechanical fractionation mechanism. Previous research suggests that magnetic resonance imaging (MRI) may be a sensitive image-based feedback mechanism for histotripsy. However, there are insufficient data to form some unified understanding of the response of the MR contrast mechanisms in tissues to histotripsy. In this paper, we investigate the response of the MR contrast parameters R1, R2, and the apparent diffusion coefficient (ADC) to various treatment levels of histotripsy in in-vitro porcine liver, kidney, muscle, and blood clot as well in formulations of bovine red blood cells suspended in agar gel...
July 25, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28741458/hybrid-polymeric-magnetic-nanoparticles-in-cancer-treatments
#16
Alexandra Muñoz Bonilla, Pilar Herrasti González
Over the last years, magnetic nanoparticles have received a great attention in cancer therapy and diagnosis. Magnetic drug targeting, is a particularly promising application in this area as the nanoparticles can be directed to the tumor by external magnetic field and concentrated the drug in this tumor tissue. In addition to this magnetic targeting, their inherent magnetic properties provide sensitive contrast enhancement in magnetic resonance imaging (MRI) and can, therefore, be visualized and used for theranostic purposes...
May 18, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28741437/traumatic-brain-injury-in-a-community-based-cohort-of-homeless-and-vulnerably-housed-individuals
#17
Toby Schmitt, Allen Thornton, Iris Rawtaer, Alasdair Barr, Kristina Gicas, Donna Lang, Talia Vertinsky, Alexander Rauscher, Ric Procyshyn, Tari Buchanan, Alex Cheng, Sarah Mackay, Olga Leonova, Verena Langheimer, Thalia Field, Manraj K S Heran, Fidel Vila-Rodriguez, Tiffany-Anne O'Connor, William MacEwan, William Honer, William Panenka
We characterized traumatic brain injury (TBI) and studied its associations with mental and physical health in a community cohort of homeless and vulnerably-housed individuals. METHODS: Detailed mental and physical health structured interviews, neuropsychological testing, and multimodal MRI were performed on 283 participants. Two traumatic brain injury (TBI) participant groups were defined for primary analyses: those with a self-reported history of TBI and those with MRI evidence of TBI...
July 25, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28741401/trans-diagnostic-comparison-of-response-inhibition-in-tourette-s-disorder-and-obsessive-compulsive-disorder
#18
Siyan Fan, Danielle C Cath, Ysbrand D van der Werf, Stella de Wit, Dick J Veltman, Odile A van den Heuvel
OBJECTIVES: Impaired response inhibition is related to neurodevelopmental disorders, such as Tourette's disorder (TD) and obsessive-compulsive disorder (OCD). Unlike OCD, in which neural correlates of response inhibition have been extensively studied, TD literature is limited. By using a Stop-Signal task, we investigated the neural mechanisms underlying response inhibition deficits in TD compared to OCD and healthy controls (HCs). METHODS: Twenty-three TD patients, 20 OCD patients and 22 HCs were scanned (3T MRI)...
July 25, 2017: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/28741155/length-change-patterns-and-shape-of-a-grafted-tendon-after-anatomical-medial-patellofemoral-ligament-reconstruction-differs-from-that-in-a-healthy-knee
#19
Shuji Nakagawa, Yuji Arai, Hiroaki Inoue, Manabu Hino, Yuta Fujii, Shintaro Komaki, Kazuya Ikoma, Keiichiro Ueshima, Hiroyoshi Fujiwara, Toshikazu Kubo
PURPOSE: Recurrent patellar dislocation is currently treated with anatomical reconstruction of the medial patellofemoral ligament (MPFL), and favourable postoperative outcomes have been reported. However, it is uncertain if healthy MPFL function is restored by anatomical reconstruction. The hypothesis in this study was that stabilization of the patella following MPFL reconstruction would be improved compared with that before surgery, but that function of the grafted tendon would differ from that of a healthy MPFL...
July 24, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28741075/brain-relaxometry-after-macrocyclic-gd-based-contrast-agent
#20
Andreas Müller, Alina Jurcoane, Burkhard Mädler, Philip Ditter, Hans Schild, Elke Hattingen
PURPOSE: To assess if ratios of T1-weighted (T1w) signal intensity (SI) and quantitative T1 relaxometry (qT1) change on serial administration of macrocyclic gadobutrol. METHODS: A total of 17 glioblastoma patients were scanned at 3.0 T magnetic resonance imaging (MRI) every 6 weeks after tumor resection with standard MRI and T1 and T2 relaxometry before and after gadobutrol administration. On co-registered images T1w SI was measured and relaxation times T1 (qT1) and quantitative T2 (qT2) were quantified in several deep grey matter nuclei as ratios relative to frontal white matter and to the pons...
July 24, 2017: Clinical Neuroradiology
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