Articles tagged with Lesions
Damage to parts of the orbitofrontal cortex increases defensive responses to threats in monkeys. The study suggests that specific symptoms of anxiety disorders may arise from dysfunction in distinct subregions of OFC.
A clinical trial found that immunotherapy treatment significantly reduced the risk of developing squamous cell carcinoma (SCC) in patients with precancerous skin lesions. The study showed a 75% reduction in SCC development on the face and scalp, with only 7% of participants developing SCC compared to 28% in the control group.
A new study found that non-contrast MRI is just as effective as contrast-enhanced MRI for monitoring disease progression in MS patients. The study used image subtraction techniques to detect newly occurring lesions with high sensitivity.
A study in PLOS Neglected Tropical Diseases analyzed gene expression in patients with diffuse cutaneous leishmaniasis, revealing a heightened presence of B cell transcripts and unique patterns of macrophage activation. The research also identified new targets for vaccine development against this rare and neglected tropical disease.
Research suggests the cervical microbiome influences HPV infection, with a richer microbial mix found in high-grade lesions. Mycoplasma bacteria may promote HPV-related lesion growth.
A Dartmouth research team has found a machine learning method to predict atypical ductal hyperplasia (ADH) upgrade to cancer. The model identifies 98% of all malignant cases prior to surgery while sparing 16% of women who would have undergone unnecessary surgery for a benign lesion.
A large pilot study confirms HPV screening is practical on a large scale and more sensitive than smear testing, detecting substantially more cervical lesions and cancer. The study's findings support extending screening intervals to at least five years without increasing the risk of potentially life-threatening disease.
Researchers at University College London have discovered the genetic differences between lung cancer precursor cells and harmless lesions. This breakthrough could lead to the development of screening tests and new treatments that can stop cancer in its tracks, saving lives by detecting the disease earlier.
A systematic review of clinical studies on prurigo nodularis treatment found neurokinin-1 receptor antagonists to be the most promising emerging therapies. The study highlights the need for higher-powered studies and randomized controlled trials to better evaluate treatment options.
Researchers have identified a novel mechanism for neuronal regeneration after stroke. By overproducing the protein Slit in neuroblasts, these cells can migrate past activated astrocytes and mature into functional neurons.
Three JAMA Pediatrics articles focus on acute flaccid myelitis (AFM), a poorly understood condition causing muscle weakness and spinal cord lesions in children. The studies aim to better understand the cause, progression, biomarkers, prognosis, and treatment of AFM.
A study of moderately dysplastic moles found that patients who received close observation did not develop melanoma at the site of the excised mole, but had a higher risk of developing melanoma at a separate site. The findings suggest that dysplastic moles are not precursors to melanoma, but rather a risk factor.
The study found that pro-inflammatory TNFα and anti-inflammatory CCL18 cytokines are increased in human atherosclerotic lesions, associated with cholesterol accumulation. The expression levels vary across plaque stages, with maximum levels in lipofibrous plaques.
A study published in PNAS identifies two distinct brain networks involved in the perception of free will: the anterior cingulate cortex for volition and the precuneus cortex for agency. These findings suggest that damage to these regions can lead to impaired motivation and sensation of ownership over movements.
A study of brain lesions reveals consistent connections between regions linked to volition and agency, which are components of free will. The identified networks suggest possible underpinnings of free will and could aid studies of related neuropsychiatric disorders.
Researchers used lesion network mapping to analyze how brain injuries disrupt volition and agency, finding that symptoms localize to interconnected brain networks. The study suggests that targeting these networks through brain stimulation may lead to new approaches for treating disrupted free will in neurological and psychiatric patients.
A multicenter study found that IVUS guidance over angiography guidance during DES implantation reduces target vessel failure by lowering the rate of TVF at one year. The ULTIMATE trial showed improved clinical outcomes, particularly for patients who had an IVUS-defined optimal procedure.
Researchers from Aarhus University conducted a study on the clinical condition of cull sows prior to transportation to slaughter. The results show that a significant portion of sows had various injuries and disabilities, including wounds, superficial skin lesions, and udder lesions, highlighting the need for improved animal welfare in ...
The use of intravascular ultrasound guidance during percutaneous coronary intervention has been shown to improve clinical outcomes, particularly in reducing ischemia-driven target lesion revascularization. IVUS guidance has also been associated with a decrease in intraobserver variability in angiographic borderline lesions.
A new study analyzing 76 untreated metastases from 20 patients found that different metastatic lesions share the same driver gene mutations. The findings suggest that a biopsy of a single metastatic lesion could provide sufficient information for treatment decisions.
A breakthrough discovery reveals that the DDX11 helicase enzyme plays a vital role in DNA repair and serves as a backup to the Fanconi Anemia pathway. This finding has significant implications for understanding genomic stability and disorders associated with DNA repair deficiency, including cancer and developmental disorders.
Researchers at University of California San Diego School of Medicine describe how RNA polymerase I stalls by DNA lesions caused by UV exposure. The study identifies a key amino acid essential to detecting UV damage, offering potential for novel cancer therapeutic targets.
The article reviews existing novel approaches for automating melanocytic skin lesions diagnosis, highlighting success and shortcomings. Recommendations are made to reduce complexity and protracted computation by favoring better classification models over feature selection.
The DeepLesion database is the largest publicly available medical image dataset, containing over 32,000 annotated lesions from 10,000 case studies. It has tremendous potential to jump-start the field of computer-aided detection and diagnosis.
A study published in Radiology found that cardiac hybrid imaging, combining CT and nuclear stress testing, is an excellent long-term predictor of adverse cardiac events. The imaging approach helps identify stenosis and perfusion, providing critical information for treatment decisions.
A team of researchers discovered hunting lesions on fallow deer skeletons dating back 120,000 years to Neandertal hunting methods. The findings suggest a confrontational way of hunting requiring careful planning and close cooperation.
Scientists have developed a biodegradable patch that sticks to the inside of the mouth, administering steroids directly to oral ulcers while creating a protective barrier. The novel plaster, called Rivelin, is effective in treating conditions such as oral lichen planus and recurrent aphthous stomatitis.
Researchers found that atrophied brain lesions, rather than new or expanding lesions, predict disability progression in multiple sclerosis. The study suggests that the disappearance of brain lesions into cerebrospinal fluid may be a more accurate indicator of disease worsening.
A clinical trial of 179 patients found improvement in facial angiofibroma appearance with topical rapamycin treatment. The use of topical rapamycin is considered safe and effective for treating disfiguring growths in people with tuberous sclerosis complex.
Researchers confirm that frontal cortical lesions moderate response to prism adaptation treatment, with improvement seen only in individuals with frontal lesions. The study suggests early identification of patients with hemiparesis and frontal lesions is crucial for optimal recovery.
A study found that damage to brain pathways can lead to attention deficit in patients with subcortical stroke. The research used voxel-based lesion-symptom mapping and diffusion tensor tractography to identify the responsible impaired connections.
A study found that post-mortem CT angiography outperformed conventional autopsy in detecting skeletal and vascular lesions, which can provide crucial information in post-mortem examinations. The technique showed high sensitivity and specificity, making it an excellent choice for investigating traumatic deaths.
The American Society for Gastrointestinal Endoscopy has released new guidelines for the use of endoscopic eradication therapy in patients with Barrett's esophagus, a precursor to esophageal adenocarcinoma. The guidelines support evidence-based recommendations and clinical guidelines addressing key issues related to Endoscopic Eradicati...
Scientists at Osaka University developed a new topical gel to treat skin lesions in TSC, a rare inherited disease. The drug's approval marks a world first and offers a painless, safe, and easy-to-use solution for patients suffering from cosmetic issues.
A study published in PLOS Neglected Tropical Diseases found that mass azithromycin treatment significantly decreased yaws among schoolchildren in Ghana. The provision of a single oral dose reduced both seropositivity and skin lesions consistent with yaws one year later.
A new machine learning model can accurately predict which patients are most likely to benefit from prostate multiparametric MRI (mpMRI), allowing for optimized patient selection and resource allocation. The model showed high accuracy in predicting PI-RADS category 4 or 5 lesions, with a sensitivity of 75% and specificity of 82%.
The modern OCA transplantation technique achieved an 89% satisfaction rate in treating isolated femoral condyle lesions. Patients showed significant improvements in clinical scores, including IKDC total scores improving from 43.7 to 76.2.
New research from the University of British Columbia has found that non-smokers with oral precancerous lesions are more than twice as likely to progress to cancer compared to smokers. Oral precancerous lesions in non-smokers progressed faster to cancer than smoking-associated lesions.
Regular monitoring for cervical intra-epithelial neoplasia grade 2 (CIN2) is justified, as many moderate lesions regress spontaneously, especially in women under 30. After two years of active surveillance, half of the lesions have regressed, while one third persist and just over a fifth progress to CIN3 or worse.
Researchers found that S597 slows progression of atherosclerosis in mice with metabolic syndrome by reducing inflammation and immune cell activity. The peptide lowers blood sugar levels without preventing atherosclerosis, offering a novel treatment strategy for protecting against advanced cardiovascular disease.
The USC-led ATLAS project has compiled a large dataset of brain scans from stroke patients, which is now available for download. Researchers are using this dataset to develop and test algorithms that can automatically process MRI images from stroke patients, aiming to identify biological markers for personalized treatment plans.
Researchers developed an MRI technique that eliminates contrast agents, reducing unnecessary biopsies and detecting 98% of malignant lesions. The diffusion kurtosis imaging method provides a microscopic level picture of breast tissue, helping to clarify suspicious findings.
A new study reveals that the WHO strategy to eradicate yaws is inadequate due to high rates of antibiotic resistance and relapse of latent infections. The research found that even with high coverage rates, mass treatment alone may not be sufficient to achieve elimination, highlighting the need for adapted strategies.
A study by American Osteopathic Association finds cervical lesions progressing at different rates among Hispanic, white, Asian, and black women, affecting treatment options and risk assessment. Hispanic women progressed faster to high-grade lesions but recovered faster from them.
Terra firma-forme dermatosis is a hyperpigmented skin disease with a dirt-like appearance, found on trunks of 28% patients and extremities of 27%. Recognizing the condition helps avoid unnecessary testing and treatment.
Scientists tested patients with brain injuries to understand how the brain recognizes voices. The study found that lesions in the right posterior temporal lobe led to difficulties recognizing voices, with a crucial role played by the posterior superior temporal gyrus.
A revised set of diagnostic criteria for multiple sclerosis is expected to improve the accuracy and speed of diagnosis. The new guidelines, published in The Lancet Neurology, provide more avenues for obtaining supporting evidence for diagnosis, including positive CSF oligoclonal bands and asymptomatic MRI lesions.
Carnegie Mellon University's Tom Mitchell and MIT's Erik Brynjolfsson describe 21 criteria for evaluating task amenable to machine learning. Skills people develop and investments businesses make will determine who thrives in ML-driven economy.
A recent study found that intense physical activity did not significantly increase bone marrow edema in healthy people, challenging previous hypotheses about the role of mechanical stress in rheumatic diseases. MRI lesions were present in a significant proportion of healthy active individuals, regardless of exercise intensity.
A new technique using machine learning can improve the diagnosis of melanoma by identifying the optimal amount of context around skin lesions. By segmenting images into two parts, separating the lesion from surrounding skin, researchers found that a limited border beyond the lesion enhances classification performance.
A new study from University College London suggests that machine learning can improve clinical trials by analyzing complex brain anatomy and detecting subtle changes in drug effects. The research used large-scale data from patients with stroke to test the concept of machine learning capable of modeling the human brain in its full compl...
A study found that magnetic resonance imaging (MRI) scans of healthy military recruits showed sacroiliac joint damage similar to axial spondyloarthritis after six weeks of intensive physical training. The high prevalence of lesions at baseline and the increase in lesions after training were striking results.
A large study of FEA lesions found that only a small percentage (2.4%) upgraded to breast cancer at surgery, while 30% were upgraded to higher-risk but non-cancerous lesions. Surveillance over surgery is recommended for women with FEA who do not have genetic mutations or are not interested in chemoprevention.
The DKCRUSH-V trial found that the double kissing crush two-stent technique resulted in a lower rate of target lesion failure compared to provisional stenting at one year. The study also showed improved outcomes for patients with true distal left main bifurcation lesions.
The CULPRIT-SHOCK trial found that culprit lesion only percutaneous coronary intervention (PCI) reduces the composite of 30-day mortality and/or severe renal failure in patients with multivessel disease and cardiogenic shock. Immediate multivessel PCI was associated with higher rates of adverse outcomes.
The ABSORB IV trial found that biosorbable stents are non-inferior to traditional metal stents, but still require further advancements in device technology and technique. The study demonstrated a lower rate of device thrombosis with improved pre-dilatation and post-dilatation techniques.
Researchers at EPFL used virtual reality to reduce phantom pain in paraplegics by creating an illusion of tactile stimulation on the legs. The study, published in Neurology, found that subjects who experienced this illusion reported decreased pain levels.
A new AI-assisted endoscopic system has been shown to automatically identify colorectal adenomas during colonoscopy, demonstrating a sensitivity of 94% and specificity of 79%. The system enables real-time optical biopsy, allowing for the complete resection of adenomatous polyps and preventing unnecessary polypectomy.
Researchers discovered that tumor cells in the fallopian tubes of women at high-risk for ovarian cancer can be detected years before they develop into the disease, providing a potential window of time for early detection and intervention. The study identified TP53 gene mutations as an early indicator of ovarian cancer development.
A machine learning tool can accurately predict which high-risk breast lesions are at low risk of becoming cancerous, allowing for safer monitoring instead of surgery. The model correctly identified 97% of cases and avoided almost one-third of benign surgeries.