RESUMO
BACKGROUND AND OBJECTIVE: Systemic adverse effects (AE) are a major concern of low-dose oral minoxidil (LDOM) treatment, especially in patients with arterial hypertension or arrhythmia. The objective of this study was to evaluate the safety of LDOM in patients with hypertension or arrhythmia. PATIENTS AND METHODS: Retrospective multicenter study of patients with hypertension or arrhythmia treated with LDOM for any type of alopecia. RESULTS: A total of 254 patients with hypertension [176 women (69.3%) and 78 men (30.7%)] with a mean age of 56.9 years (range 19-82) were included. From them, the dose of LDOM was titrated in 128 patients, allowing the analysis of 382 doses. Patients were receiving a mean of 1.45 (range 0-5) antihypertensive drugs. Systemic AE were detected in 26 cases (6.8%) and included lightheadedness (3.1%), fluid retention (2.6%), general malaise (0.8%), tachycardia (0.8%) and headache (0.5%), leading to LDOM discontinuation in 6 cases (1.5%). Prior treatment with doxazosin (P<0.001), or with three or more antihypertensive drugs (P=0.012) was associated with a higher risk of discontinuation of LDOM. CONCLUSIONS: LDOM treatment showed a favorable safety profile in patients with hypertension or arrhythmia, similar to general population.
Assuntos
Hipertensão , Minoxidil , Adulto , Idoso , Idoso de 80 Anos ou mais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem , Alopecia/tratamento farmacológico , Alopecia/induzido quimicamente , Anti-Hipertensivos/efeitos adversos , Arritmias Cardíacas/induzido quimicamente , Arritmias Cardíacas/tratamento farmacológico , Hipertensão/tratamento farmacológico , Minoxidil/efeitos adversos , Resultado do Tratamento , Estudos RetrospectivosRESUMO
BACKGROUND AND OBJECTIVE: Systemic adverse effects (AE) are a major concern of low-dose oral minoxidil (LDOM) treatment, especially in patients with arterial hypertension or arrhythmia. The objective of this study was to evaluate the safety of LDOM in patients with hypertension or arrhythmia. PATIENTS AND METHODS: Retrospective multicenter study of patients with hypertension or arrhythmia treated with LDOM for any type of alopecia. RESULTS: A total of 254 patients with hypertension [176 women (69.3%) and 78 men (30.7%)] with a mean age of 56.9 years (range 19-82) were included. From them, the dose of LDOM was titrated in 128 patients, allowing the analysis of 382 doses. Patients were receiving a mean of 1.45 (range 0-5) antihypertensive drugs. Systemic AE were detected in 26 cases (6.8%) and included lightheadedness (3.1%), fluid retention (2.6%), general malaise (0.8%), tachycardia (0.8%) and headache (0.5%), leading to LDOM discontinuation in 6 cases (1.5%). Prior treatment with doxazosin (P<0.001), or with three or more antihypertensive drugs (P=0.012) was associated with a higher risk of discontinuation of LDOM. CONCLUSIONS: LDOM treatment showed a favorable safety profile in patients with hypertension or arrhythmia, similar to general population.
Assuntos
Hipertensão , Minoxidil , Masculino , Humanos , Feminino , Adulto Jovem , Adulto , Pessoa de Meia-Idade , Idoso , Idoso de 80 Anos ou mais , Minoxidil/efeitos adversos , Anti-Hipertensivos/efeitos adversos , Alopecia/tratamento farmacológico , Alopecia/induzido quimicamente , Hipertensão/tratamento farmacológico , Arritmias Cardíacas/induzido quimicamente , Arritmias Cardíacas/tratamento farmacológico , Resultado do TratamentoRESUMO
PURPOSE: The aim of this study is to identify risk factors for vertebral compression fracture (VCF) progression in patients treated conservatively with a brace. Then, a case-control study was designed. METHODS: All patients over 50 years old with diagnosis of thoracic or lumbar VCF (T5 to L5) in absence of underlying oncological process, treated conservatively with brace, and consecutively attended at our department from January 2017 to June 2021 were retrospectively selected for analysis. Patients missed for follow-up or dead during the first 3 months of follow-up were excluded. RESULTS: Five hundred and eighty-two consecutive patients were recorded. Incomplete follow-up excluded 74 patients and other 19 died in the first three months after diagnosis, so 489 cases were finally analyzed. Median follow-up was 21 (IQR 13;30) weeks. Increased collapse of the vertebral body was found in 29.9% of VCFs with a median time to progression of 9 (IQR 7;13) weeks. Male gender (OR 1.6), type A3 fracture of the AOSpine classification (OR 2.7), thoracolumbar junction location (OR 1.7), and incorrect use of the brace (OR 3.5) were identified as independent risk factors for progression after multivariable analysis. CONCLUSION: Male gender, type A3 fracture of the AOSpine classification, thoracolumbar junction location, and incorrect use of the brace were identified as independent risk factors for VCF progression, which resulted in worse pain control, when treated with brace. Thus, other treatments such as percutaneous vertebral augmentation could be considered to avoid progression in selected cases, since collapse rate has been demonstrated lower with these procedures.
Assuntos
Fraturas por Compressão , Fraturas por Osteoporose , Fraturas da Coluna Vertebral , Humanos , Masculino , Pessoa de Meia-Idade , Fraturas por Compressão/terapia , Estudos Retrospectivos , Estudos de Casos e Controles , Fraturas da Coluna Vertebral/epidemiologia , Fraturas da Coluna Vertebral/terapia , Fraturas da Coluna Vertebral/diagnóstico , Fatores de Risco , Resultado do TratamentoRESUMO
INTRODUCTION: Pheochromocytomas (PCCs) are rare tumors of neural crest origin with divergent transcriptional and metabolic profiles associated with mutational cluster types. Pseudohypoxia-type (PHT) PCCs have a poor prognosis; however diagnostic genetic testing is not always available. We aimed to investigate clinical parameters predictive of PHT PCCs. METHODS: Patients who underwent resection and genetic testing for PCC at two academic centers from 2006-2020 were retrospectively studied. Patients with PHT mutations (SDH-AF2/B/C/D, VHL) were compared to non-pseudohypoxia-type (nonPHT) PCCs to identify widely available clinical parameters predictive of PHT PCCs. Demographic, clinical, and pathologic characteristics were compared using student's T and ANOVA tests. Operative hemodynamic instability was defined as systolic blood pressure (SBP) > 200 mmHg, SBP increase of > 30% relative to baseline, and/or heart rate (HR) > 110 bpm. Mann-Whitney U test was used to assess area under the curve (AUC), sensitivity, and specificity. Recursive partitioning was used to model predictive thresholds for PHT PCC and develop a predictive score. RESULTS: Of the 79 patients included in the cohort, 17 (22%) had PHT and 62 (78%) had nonPHT PCCs. PCC patients with > 2 of the examined predictive clinical parameters (preoperative weight loss [> 10% body weight], elevated preoperative hematocrit [> 50%], normal baseline heart rate [< 100 bpm], and normal plasma metanephrines [< 0.60 nmol/L]) were more likely to have PHT PCCs (AUC = 0.831, sensitivity = 0.882, specificity = 0.694, all p < 0.001). CONCLUSIONS: Widely available preoperative clinical parameters including indicators of erythropoiesis (hemoglobin, hematocrit, and red blood cell count), baseline heart rate, plasma metanephrines, and weight loss may be useful predictors of PHT PCCs and may help guide management of PCCs when genetic testing is unavailable/delayed.
Assuntos
Neoplasias das Glândulas Suprarrenais , Feocromocitoma , Neoplasias das Glândulas Suprarrenais/diagnóstico , Neoplasias das Glândulas Suprarrenais/genética , Neoplasias das Glândulas Suprarrenais/cirurgia , Humanos , Mutação , Feocromocitoma/diagnóstico , Feocromocitoma/genética , Feocromocitoma/cirurgia , Estudos Retrospectivos , Redução de PesoRESUMO
AIMS: This study describes the physicochemical and genomic characterization of phage vB_Vc_SrVc9 and its potential for phage therapy application against a pathogenic Vibrio campbellii strain. METHODS AND RESULTS: A lytic phage vB_Vc_SrVc9 against V. campbellii was isolated from shrimp farm sediment, and characterized physicochemical and genomically. The use of vB_Vc_SrVc9 phage increased the survival in brine shrimp Artemia franciscana and reduced presumptive V. campbellii to nondetectable numbers. Genomic analysis showed a genome with a single contig of 43·15 kb, with 49 predicted genes and no tRNAs, capable of recognizing and generating complete inhibition zones of three Vibrio sp. CONCLUSIONS: To our knowledge vB_Vc_SrVc9 is a lytic phage that could be used against Vibrio infections, reducing vibrio presence without any apparent impact over the natural microbiota at the family level in 28 libraries tested. SIGNIFICANCE AND IMPACT OF THE STUDY: vB_Vc_SrVC9 is a novel phage and ecofriendly alternative for therapeutic applications and biotechnological purposes because is stable at different environmental conditions, has the potential to eliminate several strains, and has a short latent period with a good burst size. Therefore, the use of phages, which are natural killers of bacteria, represents a promising strategy to reduce the mortality of farmed organisms caused by pathogenic bacteria.
Assuntos
Artemia/microbiologia , Bacteriófagos/fisiologia , Vibrioses/veterinária , Vibrio/virologia , Animais , Bacteriófagos/genética , Bacteriófagos/isolamento & purificação , Genes Virais , Genoma Viral , Microbiota , Terapia por Fagos/veterinária , Vibrioses/microbiologia , Vibrioses/prevenção & controleRESUMO
AIMS: This study describes the effect of phage therapy on hatching of longfin yellowtail (Seriola rivoliana) eggs challenged with Photobacterium damselae subsp. damselae. METHODS AND RESULTS: A lytic phage (vB_Pd_PDCC-1) against P. damselae subsp. damselae was isolated and characterized. The use of phage vB_Pd_PDCC-1 increased the hatching rate of eggs, and reduced presumptive Vibrio species to non-detectable numbers, even in non-disinfected eggs. High-throughput 16S rRNA gene sequencing analysis revealed that phage vB_Pd_PDCC-1 caused significant changes in the composition and structure of the associated microbiota, allowing that members (e.g. those belonging to the family Vibrionaceae) of the class Gammaproteobacteria to be displaced by members of the class Alphaproteobacteria. CONCLUSIONS: To the best of our knowledge, this represents the first study evaluating phage therapy to control potential negative effects of P. damselae subsp. damselae during hatching of longfin yellowtail eggs. SIGNIFICANCE AND IMPACT OF THE STUDY: The Seriola genus includes several important commercial fish species due to its rapid growth and easy adaptability to confinement conditions. However, bacterial infections (especially those caused by Vibrio and Photobacterium species) are among the main limiting factors for the intensification of marine fish aquaculture, particularly during early development stages. Therefore, the use of phages, which are natural killers of bacteria, represents a promising strategy to reduce the mortality of farmed organisms caused by pathogenic bacteria.
Assuntos
Bacteriófagos/fisiologia , Agentes de Controle Biológico/farmacologia , Doenças dos Peixes/terapia , Peixes/microbiologia , Infecções por Bactérias Gram-Negativas/veterinária , Photobacterium/efeitos dos fármacos , Animais , Aquicultura , Doenças dos Peixes/microbiologia , Peixes/fisiologia , Infecções por Bactérias Gram-Negativas/microbiologia , Infecções por Bactérias Gram-Negativas/terapia , Microbiota/efeitos dos fármacos , Óvulo/microbiologia , Óvulo/fisiologia , Terapia por Fagos , Photobacterium/crescimento & desenvolvimentoRESUMO
OBJECTIVE: The aim of the study was to examine the relationship between caries experience and obesity in Mexican schoolchildren aged 8-12 years. STUDY DESIGN: This is a cross-sectional study. METHODS: This study was conducted on 522 schoolchildren selected from public schools. The prevalence of caries was evaluated by applying the decayed, missing and filled teeth (DMFT) index and ascertaining the subjects' dental caries experience from the mean DMFT value. Socio-economic data were collected from the parents, with data on the children's characteristics collected from them via a questionnaire. Their weight and height were then measured and used to calculate their body mass index (BMI)-for-age Z-score, which was then adjusted by age and sex. RESULTS: The prevalence of caries was 79.9% (DMFT≥1) in permanent dentition. Of all children, 47.5% of them brushed their teeth two or more times per day, and the prevalence of overweight and obesity was 20.1% and 17.6%, respectively. The logistic regression model showed that children with obesity (a >2 Z-score on the BMI-for-age growth chart) were less likely to have dental caries (odds ratio [OR] = 0.53 [95% confidence interval {CI}: 0.31-0.89]; P = 0.017) than children without obesity, with schoolchildren who consume more sweets per day (OR = 1.65 [95% CI: 1.03-2.62]; P = 0.035) more likely to present caries than schoolchildren who consume fewer sweets per day. CONCLUSION: Children with obesity are less likely to present dental caries. Comprehensive strategies aimed at risk factors can be useful in controlling nutritional status and improving oral health.
Assuntos
Cárie Dentária/epidemiologia , Obesidade Infantil/epidemiologia , Estudantes/estatística & dados numéricos , Criança , Estudos Transversais , Feminino , Humanos , Masculino , México/epidemiologia , Prevalência , Fatores de Risco , Instituições Acadêmicas , Inquéritos e QuestionáriosRESUMO
OBJECTIVE: Examine the association between marginalization and fluorosis with caries experience in Mexican rural children aged 8-12, in Oaxaca, Mexico. METHODS: Cross-sectional study of 283 rural schoolchildren selected from two locations with high and medium levels of marginalization where the water fluoride concentration ranged from 2.0 to 2.5 ppm/F. Caries was evaluated using the DMFT index and dental fluorosis with the Thylstrup-Fejerskov Index (TFI). Socioeconomic data were collected from participants' parents, with data on the children's characteristics collected from them via a questionnaire. RESULTS: The prevalence of caries was 72.4% (DMFT ≥1) in the permanent dentition. The prevalence of fluorosis was 98.0% (TFI ≥4=71.4%). 54.8% of the children brushed their teeth two or more times daily. In logistic regression children living in high levels of marginalization were more likely to present caries (OR=2.11, 95% CI 1.13 - 3.93) than children living in medium levels. Children with severe fluorosis (TFI ≥4) (OR=1.93, 95% CI 1.06 - 3.53) were more likely have caries than those with TFI ⟨3. CONCLUSION: Rural children with a high level of marginalization and fluorosis (TFI ≥4) were more likely to present caries. Poor oral hygiene and low dental service levels were found in both marginalized areas. Populations with medium/high marginalization are more susceptible to caries.
Assuntos
Cárie Dentária , Fluorose Dentária , Criança , Estudos Transversais , Índice CPO , Fluoretos/análise , Humanos , México , PrevalênciaAssuntos
Alopecia , Adulto , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Cabelo , Pressão/efeitos adversos , Tração/efeitos adversosRESUMO
Humans are altering the distribution of species by changing the climate and disrupting biotic interactions and dispersal. A fundamental hypothesis in spatial ecology suggests that these effects are scale dependent; biotic interactions should shape distributions at local scales, whereas climate should dominate at regional scales. If so, common single-scale analyses might misestimate the impacts of anthropogenic modifications on biodiversity and the environment. However, large-scale datasets necessary to test these hypotheses have not been available until recently. Here we conduct a cross-continental, cross-scale (almost five orders of magnitude) analysis of the influence of biotic and abiotic processes and human population density on the distribution of three emerging pathogens: the amphibian chytrid fungus implicated in worldwide amphibian declines and West Nile virus and the bacterium that causes Lyme disease (Borrelia burgdorferi), which are responsible for ongoing human health crises. In all three systems, we show that biotic factors were significant predictors of pathogen distributions in multiple regression models only at local scales (â¼10(2)-10(3) km(2)), whereas climate and human population density always were significant only at relatively larger, regional scales (usually >10(4) km(2)). Spatial autocorrelation analyses revealed that biotic factors were more variable at smaller scales, whereas climatic factors were more variable at larger scales, as is consistent with the prediction that factors should be important at the scales at which they vary the most. Finally, no single scale could detect the importance of all three categories of processes. These results highlight that common single-scale analyses can misrepresent the true impact of anthropogenic modifications on biodiversity and the environment.
Assuntos
Biodiversidade , Borrelia burgdorferi , Doença de Lyme/epidemiologia , Modelos Biológicos , Febre do Nilo Ocidental/epidemiologia , Vírus do Nilo Ocidental , Animais , Humanos , Doença de Lyme/veterinária , Febre do Nilo Ocidental/veterináriaRESUMO
BACKGROUND: The aim of this study was to compare a conventional technique (elastomeric impression material - EIM) and a digital technique (scanner digital model - SDM) on a six-analog master model (MM) to determine which was the most exact. MATERIAL AND METHODS: Twenty impressions were taken of a master model (EIM) and twenty scanned impressions (SDM) (True Definition). A coordinate measuring machine (CMM) was used to measure the distances between adjacent analogues (1-2, 2-3, 3-4, 4-5, 5-6), intermittently positioned analogues (1-4, 3-6) and the most distal (1-6). Reference values were established from the master model, which were compared with the two impression techniques. The significance level was established as 5% (p<0.05). RESULTS: The precision of each technique was compared with MM. For adjacent analogues (1-2), no significant differences were found between EIM-MM (p=0,146). For intermittently positioned analogues (1-4), SDM did not show significant differences with MM (p=0.255). For the distance between distal analogues (1-6), significant differences were found between both techniques and MM (p=0.001). CONCLUSIONS: In a clinical situation with < three implants, EIM is more exact than SDM, but in cases of four implants SDM is more exact. For rehabilitations (> four implants), neither technique can be considered accurate although error falls within the tolerance limits established in the literature (30-150µm).
Assuntos
Implantes Dentários , Materiais para Moldagem Odontológica , Técnica de Moldagem Odontológica , Elastômeros , Desenho Assistido por Computador , Precisão da Medição Dimensional , Técnicas In Vitro , Modelos DentáriosRESUMO
Maturity-Onset Diabetes of the Young (MODY) type 4 or PDX1 -MODY is a rare form of monogenic diabetes caused by heterozygous variants in PDX1 . Pancreatic developmental anomalies related to PDX1 are reported only in neonatal diabetes cases. Here, we describe dorsal pancreatic agenesis in 2 patients with PDX1 -MODY. The proband presented with diabetes since 14 years of age and maintained regular glycemic control with low doses of basal insulin and detectable C-peptide levels after 38 years with diabetes. A diagnosis of MODY was suspected. Targeted next-generation sequencing identified a heterozygous variant in PDX1 : c.188delC/p.Pro63Argfs*60. Computed tomography revealed caudal pancreatic agenesis. Low fecal elastase indicated exocrine insufficiency. His son had impaired glucose tolerance, presented similar pancreatic agenesis, and harbored the same allelic variant. The unusual presentation in this Brazilian family enabled expansion upon a rare disease phenotype, demonstrating the possibility of detecting pancreatic malformation even in cases of PDX1 -related diabetes diagnosed after the first year of life. This finding can improve the management of MODY4 patients, leading to precocious investigation of pancreatic dysgenesis and exocrine dysfunction.
Assuntos
Anormalidades Congênitas/genética , Diabetes Mellitus Tipo 2/genética , Proteínas de Homeodomínio/genética , Pâncreas/anormalidades , Doenças Raras/genética , Transativadores/genética , Brasil , Peptídeo C/genética , Pré-Escolar , Anormalidades Congênitas/diagnóstico , Anormalidades Congênitas/fisiopatologia , Diabetes Mellitus Tipo 2/diagnóstico , Diabetes Mellitus Tipo 2/fisiopatologia , Intolerância à Glucose/genética , Intolerância à Glucose/fisiopatologia , Heterozigoto , Humanos , Masculino , Pessoa de Meia-Idade , Mutação , Pâncreas/fisiopatologia , Elastase Pancreática/genética , Fenótipo , Doenças Raras/diagnóstico , Doenças Raras/fisiopatologiaRESUMO
Infectious diseases of humans, wildlife, and domesticated species are increasing worldwide, driving the need to understand the mechanisms that shape outbreaks. Simultaneously, human activities are drastically reducing biodiversity. These concurrent patterns have prompted repeated suggestions that biodiversity and disease are linked. For example, the dilution effect hypothesis posits that these patterns are causally related; diverse host communities inhibit the spread of parasites via several mechanisms, such as by regulating populations of susceptible hosts or interfering with parasite transmission. However, the generality of the dilution effect hypothesis remains controversial, especially for zoonotic diseases of humans. Here we provide broad evidence that host diversity inhibits parasite abundance using a meta-analysis of 202 effect sizes on 61 parasite species. The magnitude of these effects was independent of host density, study design, and type and specialization of parasites, indicating that dilution was robust across all ecological contexts examined. However, the magnitude of dilution was more closely related to the frequency, rather than density, of focal host species. Importantly, observational studies overwhelmingly documented dilution effects, and there was also significant evidence for dilution effects of zoonotic parasites of humans. Thus, dilution effects occur commonly in nature, and they may modulate human disease risk. A second analysis identified similar effects of diversity in plant-herbivore systems. Thus, although there can be exceptions, our results indicate that biodiversity generally decreases parasitism and herbivory. Consequently, anthropogenic declines in biodiversity could increase human and wildlife diseases and decrease crop and forest production.
Assuntos
Biodiversidade , Doenças Parasitárias/prevenção & controle , Animais , Suscetibilidade a Doenças , Interações Hospedeiro-Parasita , HumanosRESUMO
This is the first study to isolate, identify and characterize Streptococcus iniae as the causative disease agent in two tilapia (Oreochromis aureus) populations. The populations were geographically isolated, of distinct origins, and did not share water sources. Affected fish showed various external (e.g., exophthalmia and cachexia, among others) and internal (e.g., granulomatous septicaemia and interstitial nephritis, among others) signs. All internal organ samples produced pure cultures, two of which (one from each farm, termed S-1 and S-2) were subjected to biochemical, PCR and 16S rRNA sequencing (99.5% similarity) analyses, confirming S. iniae identification. The two isolates presented genetic homogeneity regardless of technique (i.e., RAPD, REP-PCR and ERIC-PCR analyses). Pathogenic potentials were assessed through intraperitoneal injection challenges in rainbow trout (Oncorhynchus mykiss) and zebrafish (Danio rerio). Rainbow trout mortalities were respectively 40% and 70% at 104 and 106 CFU per fish with the S-1 isolate, while 100% mortality rates were recorded in zebrafish at 102 and 104 CFU per fish with the S-2 isolate. The obtained data clearly indicate a relationship between intensified aquaculture activities in Mexico and new disease appearances. Future studies should establish clinical significances for the tilapia industry.
Assuntos
Ciclídeos , Doenças dos Peixes/microbiologia , Infecções Estreptocócicas/veterinária , Streptococcus iniae/isolamento & purificação , Animais , México , Filogenia , RNA Bacteriano/análise , RNA Ribossômico 16S/análise , Análise de Sequência de RNA , Infecções Estreptocócicas/microbiologia , Streptococcus iniae/genéticaRESUMO
Resource availability can significantly alter host-parasite dynamics. Abundant food can provide more resources for hosts to resist infections, but also increase host tolerance of infections by reducing competition between hosts and parasites for food. Whether abundant food favors host resistance or tolerance (or both) might depend on the type of resource that the parasite exploits (e.g., host tissue vs. food), which can vary based on the stage of infection. In our study, we evaluated how low and high resource diets affect Cuban tree frog (Osteopilus septentrionalis) resistance and tolerance of a skin-penetrating, gut nematode Aplectana sp. at each stage of the infection. Compared to a low resource diet, a high resource diet enhanced frog resistance to worm penetration and tolerance while worms traveled to the gut. In contrast, a low resource diet increased resistance to establishment of the infection. After the infection established and worms could access food resources in the gut, a high resource diet enhanced host tolerance of parasites. On a high resource diet, parasitized frogs consumed significantly more food than non-parasitized frogs; when food was then restricted, mass of non-parasitized frogs did not change, whereas mass of parasitized frogs decreased significantly. Thus, a high resource diet increased frog tolerance of established worms because frogs could fully compensate for energy lost to the parasites. Our study shows that host-parasite dynamics are influenced by the effect of resource availability on host resistance and tolerance, which depends on when parasites have access to food and the stage of infection.
Assuntos
Anuros , Nematoides , Animais , Dieta , Comportamento Alimentar , Interações Hospedeiro-ParasitaRESUMO
AIM: Full-thickness local excision after neoadjuvant chemoradiotherapy (CRT) for patients with rectal cancer and incomplete clinical response has been a treatment strategy for organ preservation. Follow-up of these patients is challenging since anatomic distortion and postoperative changes may be clinically indistinguishable from tumour recurrence. MRI may have a role in detecting recurrence. The aim of this study was to describe the MRI findings during follow-up in patients having local excision following CRT with and without local recurrence. METHOD: The data were collected retrospectively from a single centre. Fifty-three patients with rectal cancer who had full-thickness local excision after neoadjuvant CRT and near-complete response were eligible for the study. Patients with local recurrence were treated by radical salvage surgery. The main outcome was local MRI assessment findings during follow-up. RESULTS: Fifteen patients (five who developed local recurrence and 10 with no evidence of local recurrence) had MR images available for review and were included in the study. High signal intensity and thickening of the rectal wall were present in all patients with recurrent disease within the rectal wall. Overall, 80% of the patients with recurrence showed diffusion restriction. MRI mesorectal fascia status and circumferential resection margin showed agreement in all cases. A low signal intensity scar was seen in all patients without recurrent disease. CONCLUSION: MRI shows high signal intensity and thickening of the rectal wall in recurrent disease in comparison to a low signal intensity fibrotic scar in non-recurrent disease. These findings may be useful in surveillance of these patients.
Assuntos
Quimiorradioterapia Adjuvante/métodos , Imageamento por Ressonância Magnética , Recidiva Local de Neoplasia/diagnóstico por imagem , Neoplasias Retais/diagnóstico por imagem , Microcirurgia Endoscópica Transanal/métodos , Idoso , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Terapia Neoadjuvante/métodos , Recidiva Local de Neoplasia/patologia , Recidiva Local de Neoplasia/cirurgia , Estadiamento de Neoplasias , Período Pós-Operatório , Neoplasias Retais/patologia , Neoplasias Retais/terapia , Reto/diagnóstico por imagem , Reto/cirurgia , Estudos Retrospectivos , Terapia de Salvação , Resultado do TratamentoRESUMO
We report on a direct measurement of the Internal Energy Distribution (IED) shift rate of an initially hot polycyclic aromatic hydrocarbon (PAH) molecular ensemble, anthracene cations (C14H10+). The ions were produced in an electron cyclotron resonance (ECR) ion source and stored in an electrostatic ion storage ring, the Mini-Ring. Laser pulses of two wavelengths were sent successively to merge the stored ion bunch at different storage times to enhance the neutral fragment yield due to fast laser induced dissociation. Using this technique, we have been able to determine directly the energy shift rate of the IED, without involving any theoretical simulation or any assumption on dissociation rates, cooling rates, or the initial IED. Theoretical energy shift rates have been estimated from the evolution of simulated IEDs by taking into account the effects of the unimolecular dissociation and two radiative decay mechanisms: the Poincaré fluorescence and the infrared vibrational emission. The comparison between the experimental results and the model provides new evidence of the important role of the Poincaré fluorescence in the overall cooling process of anthracene cations. Although in the short time range the commonly accepted intuition says that the cooling would result mostly from the dissociation of the hottest ions (depletion cooling), we demonstrate that the Poincaré fluorescence is the dominant contribution (about 85%) to the net cooling effect.
RESUMO
BACKGROUND: Frontal fibrosing alopecia (FFA) is a chronic scarring alopecia with an unpredictable evolution. There are no current classifications of this disease that may predict its prognosis. OBJECTIVE: To analyse the differences in clinical presentation and evolution of FFA patients and to create a clinical and prognostic classification. METHODS: We conducted a retrospective analytical study of FFA patients. Clinical characteristics of frontal hairline recession were used as the sorting variable between patterns of presentation. A cohort of 106 patients homogenously treated with oral dutasteride and topical corticosteroid was followed 12 months. RESULTS: In all, 242 female patients with a mean age of 61.4 years were included. Patients were classified into three clinical patterns [118 (48.8%) patients as pattern I (linear), 109 patients (45%) as pattern II (diffuse) and 15 patients (6.2%) as pattern III (double line)]. Stabilization was achieved in 37.3% of the 106 patients treated with oral dutasteride and topical corticosteroid. Pattern III patients had less hairline recession and eyebrow involvement at the diagnosis and after treatment. LIMITATIONS: Retrospective design. CONCLUSIONS: Frontal fibrosing alopecia patients can be classified into three different clinical patterns with different prognosis. Pattern III patients have the best prognosis, while pattern II patients have the worst prognosis.
Assuntos
Alopecia/classificação , Corticosteroides/uso terapêutico , Adulto , Idoso , Idoso de 80 Anos ou mais , Alopecia/tratamento farmacológico , Alopecia/patologia , Dutasterida/uso terapêutico , Feminino , Humanos , Pessoa de Meia-Idade , Prognóstico , Estudos RetrospectivosRESUMO
INTRODUCTION: Dermatological complaints have been estimated to represent up to 5-10% of all the visits to emergency departments. The main objective of our study was to determine how affected is the Health related Quality of Life (HRQL) in a series of patients attending an emergency department due to skin symptoms. PATIENTS AND METHODS: A prospective study during one month (July 2016) was conducted in a hospital with full-time on-call dermatologists. The Short-Form SF-12v2 Health Survey and the Dermatology Life Quality Index (DLQI) were offered to all the patients over 18 years old attending the emergency department with cutaneous complaints. Clinical and epidemiological characteristics were also collected. RESULTS: In total 108 patients completed the study. Mean age found was 45.1±16.1 years. Mean DLQI score found was 10.56±6.12. Fifty-three patients (49%) had a score of 11 or higher in the DLQI questionnaire. Most affected subscales were "Symptoms and Feelings" in DLQI scale and "Overall Health" and "Vitality" for the SF-12. A very significant difference (p<0.0001) was found between women's (12.4±5.7) and men's (7.5±5.6) DLQI mean score (mean difference of 4.9; 95% confidence interval of the difference: 2.7-7.1). CONCLUSIONS: Patients visiting emergency units with cutaneous complaints seem to feel a moderate-large impact on their quality of life which is mainly related to the symptoms and feelings that they are experiencing. This impact is significantly higher among women.