Read by QxMD icon Read

Natural history

Matilde Inglese, Maria Petracca
PURPOSE OF REVIEW: Clinical MRI is of paramount importance for multiple sclerosis diagnosis but lacks the specificity to investigate the pathogenic mechanisms underlying disease onset and progression. The application of advanced magnetic resonance (MR) sequences allows the characterization of diverse and complex pathological mechanisms, granting insights into multiple sclerosis natural history and response to treatment. RECENT FINDINGS: This review provides an update on the most recent international guidelines for optimal standard imaging of multiple sclerosis and discusses advantages and limitations of advanced imaging approaches for investigating inflammation, demyelination and neurodegeneration...
March 19, 2018: Current Opinion in Neurology
Misael Chinchilla
The endogenous life cycle of Eimeria caliginosa was studied in experimentally-infected dusky rice rats, Melanomys caliginosus. All endogenous stages were located in the epithelial cells of villi in the small intestine. Both Giemsa-stained mucosal scrapings and histological sections were studied for the diagnosis of all the life cycle stages. Eimeria caliginosa has 3 generations of meronts (M) that differ by size, shape, and number of merozoites (m), which also differ in their size, shape, and location of their nuclei within the cytoplasm of the meronts...
March 21, 2018: Journal of Parasitology
A de Nonneville, C Toullec, J Y Blay, D Ranchere, P E Stoeckle, A Italiano, S Bonvalot, A P Terrier, F Duffaud, F Bertucci, D Cupissol, N Isambert, S Piperno Neumann, J M Coindre, S Salas
INTRODUCTION : The natural history of localized high-grade sarcomas of the digestive tract (SDT) excluding GIST has been rarely considered owing to their low incidence and heterogeneity. We describe the histoclinical characteristics of SDT and correlate them with patients' outcomes. METHODS: We retrospectively collected medical files from a European database covering connective tissue tumors listed in Europe for about twenty years. Only untreated localized primary high-grade SDT were included...
October 2017: Acta Gastro-enterologica Belgica
David H Miller, Fred D Lublin, Maria Pia Sormani, Ludwig Kappos, Özgür Yaldizli, Mark S Freedman, Bruce A C Cree, Howard L Weiner, Catherine Lubetzki, Hans-Peter Hartung, Xavier Montalban, Bernard M J Uitdehaag, David G MacManus, Tarek A Yousry, Claudia A M Gandini Wheeler-Kingshott, Bingbing Li, Norman Putzki, Martin Merschhemke, Dieter A Häring, Jerry S Wolinsky
Objective: To investigate the relationship between brain volume and disability worsening over ≥3 years in the natural history of primary progressive multiple sclerosis using data from the placebo group of the INFORMS trial ( n  = 487; NCT00731692). Methods: Magnetic resonance imaging scans were collected annually. Brain volume loss was determined using SIENA. Patients were stratified by baseline normalized brain volume after adjusting for demographic and disease-burden covariates...
March 2018: Annals of Clinical and Translational Neurology
Laura M Jacobsen, Michael J Haller, Desmond A Schatz
While the incidence of type 1 diabetes continues to rise by 3% each year, the ability to prevent this disease remains elusive. Hybrid closed loop devices, artificial pancreas systems, and continuous glucose monitoring technology have helped to ease the daily burden for many people living with type 1 diabetes. However, the artificial pancreas is not a cure; more research is needed to achieve our ultimate goal of preventing type 1 diabetes. The preceding decades have generated a wealth of information regarding the natural history of pre-type 1 diabetes...
2018: Frontiers in Endocrinology
Patrick Murtagh, Maxwell Treacy, Kirk Stephenson, Ian Dooley
A 33-year-old man presented with a 10-day history of bilateral blurred vision on a background of a prodromal influenza-like illness. Ocular Coherence Tomography (OCT) and fundal examination coincided with a diagnosis of atypical central serous retinopathy. The patient's symptoms worsened during follow-up, and he was started on steroids. Subsequent fundal examination revealed yellow deposits in a honeycomb pattern and hard exudates in the perimacular region. Serial OCTs revealed progression of bilateral macular intraretinal and subretinal fluid...
March 20, 2018: BMJ Case Reports
Polly J Bingley, Diane K Wherrett, Ann Shultz, Lisa E Rafkin, Mark A Atkinson, Carla J Greenbaum
What will it take to bring disease-modifying therapy to clinical use in type 1 diabetes? Coordinated efforts of investigators involved in discovery, translational, and clinical research operating in partnership with funders and industry and in sync with regulatory agencies are needed. This Perspective describes one such effort, Type 1 Diabetes TrialNet, a National Institutes of Health-funded and JDRF-supported international clinical trials network that emerged from the Diabetes Prevention Trial-Type 1 (DPT-1)...
April 2018: Diabetes Care
Nkem Nweze, Afshin Parsikia, Rakesh Ahuja, Amit R T Joshi
Hidradenitis suppurativa (HS) is a chronic inflammatory disease of the apocrine sweat glands. Although the mainstay of surgical treatment is excision, the disease has a high tendency to recur, for reasons that are not well understood. We sought to better characterize the natural history of this disease, focusing on patients who required operative intervention. Two hundred and fourteen patients with axillary HS underwent 293 surgical procedures. We divided the cohort into two groups based on recurrence and then compared them to identify the factors most associated with recurrent axillary HS...
March 1, 2018: American Surgeon
Moritz Lindner, Sebastian Kosanetzky, Maximilian Pfau, Jennifer Nadal, Lukas A Gördt, Steffen Schmitz-Valckenberg, Matthias Schmid, Frank G Holz, Monika Fleckenstein
Purpose: To assess the impact of distinct atrophy border characteristics based on spectral-domain optical coherence tomography (SD-OCT) imaging on local atrophy progression. Methods: Patients with geographic atrophy (GA) secondary to AMD were recruited in the context of the Longitudinal Fundus Autofluorescence in Age-related Macular Degeneration and Directional Spread in Geographic Atrophy studies (NCT00393692, NCT02051998). Horizontal and vertical SD-OCT scans were acquired at sequential visits using a device allowing for anatomically accurate registration of follow-up to baseline scans...
March 20, 2018: Investigative Ophthalmology & Visual Science
Izabela Łaczmańska, Justyna Kuliczkowska-Płaksej, Agnieszka Stembalska
Short stature, which is defined as height below 2 standard deviations of the mean height for the age and sex, is one of the most frequent reasons for medical consultations in children. Short stature may occur due to a constitutional delay in growth, familial short stature or chronic diseases, including many genetic syndromes, metabolic and endocrine disorders. In this article the authors provide a mini-review of the most frequent genetic syndromes associated with short stature that should be taken into account in the differential diagnosis process...
March 14, 2018: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
Lindsay A McGrath, Kahmi Satchi, Alan A McNab
PURPOSE: Acute noninfectious dacryocystic retention is an under-recognized condition heralded by painful lacrimal sac swelling, obstruction, and epiphora. This longitudinal chart review aimed to estimate the incidence of this condition in an urban Australian population, while further defining the signs and symptoms of the disease and options for management. METHODS: We retrospectively reviewed the charts of 1,593 consecutive patients presenting with acquired nasolacrimal duct obstruction and epiphora between 1990 and 2015...
August 8, 2017: Ophthalmic Plastic and Reconstructive Surgery
Berardo Sarubbi, Gaetano Rea, Giuseppe Santoro, Enrico Melillo, Giancarlo Scognamiglio, Maria Giovannna Russo
One of the major complications of radiofrequency catheter ablation (RFCA) for atrial fibrillation (AF) is pulmonary vein stenosis (PVS). The natural history of PVS, especially when it involves more than one vein, leads to severe and irreversible pulmonary hypertension with end-stage right heart failure that can require, in extreme cases, even heart-lung transplantation. We report the case of a young patient who underwent RFCA for a single lasting episode of AF and developed PVS years later. He was treated with ballon venoplasty followed by stent implantation in left pulmonary vein because of PVS relief...
March 9, 2018: Monaldi Archives for Chest Disease, Archivio Monaldi Per le Malattie del Torace
Yu Tsukanov
BACKGROUND: To study the possibility of minimization of the skin incisions up to a puncture size at stripping by Mayo with the use of the stripper with an oval-ring head for large-diameter veins. METHODS: The problem is solved due to the geometrical changing of the stripper head from a round to an oval one. The laboratory experiment showed that with a vein diameter of 10-20 mm the total cross-sectional area of its walls constituted 13.61 mm2, with a diameter of more than 20 mm it was 19...
March 15, 2018: International Angiology: a Journal of the International Union of Angiology
M Ruggeri, M Basile, C Drago, F R Rolli, A Cicchetti
BACKGROUND: Until very recently the only therapeutic alternative for the management of patients affected by gout/hyperuricemia that did not respond to a first-line treatment based on allopurinol alone or who cannot tolerate allopurinol was febuxostat, a xanthine oxidase non-purine-selective inhibitor. Lately, however, a new therapeutic alternative has become available for the management of this pathology: lesinurad, a urate transporter inhibitor. OBJECTIVE: To objective of this study was to evaluate the cost effectiveness of lesinurad/allopurinol in comparison with febuxostat as a second-line therapeutic strategy for the management of patients affected by gout and hyperuricemia that did not respond to a first-line therapy based on allopurinol alone...
March 19, 2018: PharmacoEconomics
Rushi V Parikh, Jack Boyd, David P Lee, Ronald Witteles
Methamphetamine abuse is an increasingly prevalent cause of pulmonary artery hypertension in the United States. Conversely, an atrial septal defect rarely presents late as pulmonary artery hypertension. We present the case of a 44-year-old methamphetamine abuser who had a 3-month history of worsening fatigue and near-syncope. She had elevated cardiac enzyme levels and right-sided heart strain. Angiographic findings suggested methamphetamine-induced pulmonary artery hypertension; however, we later heard S2 irregularities that raised suspicion of an atrial septal defect...
February 2018: Texas Heart Institute Journal
Mitsuru Ohishi
Elevated blood pressure is closely related to increased circulatory fluid volume and peripheral vascular resistance. Patients with diabetes mellitus experience increased peripheral artery resistance caused by vascular remodeling and increased body fluid volume associated with insulin resistance-induced hyperinsulinemia and hyperglycemia. Both of these mechanisms elevate systemic blood pressure. Thus, fully understanding the pathophysiology of hypertension in diabetes mellitus requires knowing the natural history of type 2 diabetes...
March 19, 2018: Hypertension Research: Official Journal of the Japanese Society of Hypertension
Milan Vrtílek, Jakub Žák, Matej Polačik, Radim Blažek, Martin Reichard
The natural history of model organisms is often overlooked despite its importance to correctly interpret the outcome of laboratory studies. Ageing is particularly understudied in natural populations. To address this gap, we present lifetime demographic data from wild populations of an annual species, the turquoise killifish, Nothobranchius furzeri, a model species in ageing research, and two other species of coexisting annual killifishes. Annual killifish hatch synchronously, have non-overlapping generations, and reproduce daily after reaching sexual maturity...
March 19, 2018: Scientific Reports
Joseph D Kuebler, Jill Shivapour, Selcen Yaroglu Kazanci, Kimberlee Gauvreau, Steven D Colan, Doff B McElhinney, David W Brown
BACKGROUND: Aortic stenosis has been reported to manifest a slow rate of progression in mild disease, with a greater likelihood of progression in patients with moderate-severe disease. The natural history of the Doppler-estimated maximum gradient (DEMG) in patients after balloon aortic valvuloplasty (BAVP) has not previously been studied on a large scale. METHODS AND RESULTS: A retrospective review was performed of 360 patients from 1984 to 2012 with aortic stenosis, providing a total of 2059 echocardiograms both before and after BAVP...
March 2018: Circulation. Cardiovascular Imaging
Elliott C Dasenbrook, Gregory S Sawicki
Cystic Fibrosis (CF) patient registries are valuable data sources for researchers studying the natural history, treatment paradigms, and long-term health outcomes of individuals with CF. In this review, we discuss the role of CF patient registries in facilitating comparative effectiveness research, particularly evaluating therapies and variation in health care delivery. We also discuss the limitations of registry-based research, particularly indication bias, as well as statistical methods that can be used to address these issues...
March 16, 2018: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
Mohammad Alfelali, Osamah Barasheed, Al-Mamoon Badahdah, Hamid Bokhary, Mohammed I Azeem, Turki Habeebullah, Marwan Bakarman, Atif Asghar, Robert Booy, Harunor Rashid
BACKGROUND: Hajj is the world's largest annual mass gathering that attracts two to three million Muslims from around the globe to a religious assemblage in Makkah, Saudi Arabia. The risk of acquisition and transmission of influenza among Hajj pilgrims is high. Therefore, influenza vaccination is recommended, and was monitored frequently among pilgrims from different countries. However, the vaccination uptake among Saudi pilgrims has not been assessed in recent years. OBJECTIVE: This analysis aims to evaluate influenza vaccine uptake among Saudi Hajj pilgrims, and identify the key barriers to vaccination...
March 16, 2018: Vaccine
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"