Myxoid liposarcoma: MRI features with histological correlation.

BACKGROUND AND AIMS: Myxoid liposarcoma is classified in the group of sarcomas with adipose differentiation, which is the second most common group of sarcomas. However, myxoid liposarcoma is not a homogeneous entity, because the behavior and clinical course of these tumours can vary widely. This study aimed to describe the magnetic resonance imaging (MRI) features of myxoid liposarcomas and to determine whether the MRI features are associated with the histologic grade and can differentiate between low-grade and high-grade tumours and thus help in clinical decision making. MATERIAL AND METHODS: We studied 36 patients with myxoid liposarcomas treated at our centre between 2010 and 2018. We analysed clinical variables (age, sex, and tumour site) and MRI features (size, depth, borders, fatty component, myxoid component, non-fatty/non-myxoid component, apparent diffusion coefficient (ADC), and type of enhancement after the administration of intravenous contrast material). We correlated the MRI features with the histologic grade and the percentage of round cells. RESULTS: In our series, patients with myxoid liposarcomas were mainly young adults (median age, 43 years). There were no differences between sexes; 97.2% were located in the lower limbs, 86.1% were deep, and 77.8% had well-defined borders. Of the 23 myxoid liposarcomas that contained no fat, 16 (69.6%) were high grade (p = 0.01). All the tumors with a myxoid component of less than 25% were high grade (p = 0.01); 83.3% of those with a non-fatty/non-myxoid component greater than 50% were high grade (p = 0.03) and 61.5% had more than 5% round cells (p = 0.01). Diffusion sequences were obtained in 14 of the 36 patients; ADC values were high (median, 2 × 10-3 mm2/s), although there were no significant associations between low-grade and high-grade tumours. Contrast-enhanced images were available for 30 (83.3%) patients; 83.3% of the tumours with heterogeneous enhancement were high grade (p = 0.01). CONCLUSIONS: MRI can be useful for differentiating between high- and low-grade myxoid liposarcomas and can help in clinical decision making.

SELNET clinical practice guidelines for bone sarcoma.

Bone sarcoma are infrequent diseases, representing < 0.2% of all adult neoplasms. A multidisciplinary management within reference centers for sarcoma, with discussion of the diagnostic and therapeutic strategies within an expert multidisciplinary tumour board, is essential for these patients, given its heterogeneity and low frequency. This approach leads to an improvement in patient's outcome, as demonstrated in several studies. The Sarcoma European Latin-American Network (SELNET), aims to improve clinical outcome in sarcoma care, with a special focus in Latin-American countries. These Clinical Practice Guidelines (CPG) have been developed and agreed by a multidisciplinary expert group (including medical and radiation oncologist, surgical oncologist, orthopaedic surgeons, radiologist, pathologist, molecular biologist and representatives of patients advocacy groups) of the SELNET consortium, and are conceived to provide the standard approach to diagnosis, treatment and follow-up of bone sarcoma patients in the Latin-American context.

Protocol for assessing mortality reduction with the early use of noninvasive ventilation in prehospital emergency services: A multicentre, observational cohort study in Madrid, Spain.

BACKGROUND: Acute respiratory failure (ARF) has become one of the most prevalent serious pathologies encountered in the emergency medical service (EMS). In hospital settings, noninvasive ventilation (NIV) therapy prevents complications from more aggressive treatments for that condition. However, the scarce evidence on the benefits of NIV in prehospital EMS (i.e., during transport to the hospital) is inconclusive. OBJECTIVES: To determine whether the administration of NIV during prehospital EMS in cases of ARF reduces in-hospital mortality compared with starting NIV on arrival to in-patient EMS. METHODS: This is a multicentre, observational, prospective cohort study. We recruited a total of 317 patients from the Madrid region (Spain) who were prescribed NIV for their ARF using a nonprobabilistic consecutive sampling method. Analyses of the main outcome (in-hospital mortality) and secondary outcomes (length of hospital stay, readmissions, percentage of intensive care unit admissions, and cost-effectiveness) will include descriptive analyses of patients' characteristics, as well as bivariate and multivariate analyses and cost-effectiveness analysis. DISCUSSION: This study will provide data on NIV management in prehospital and in-patient EMS in patients with ARF. Results will contribute to the existing evidence on the benefits of NIV in the context of prehospital EMS while underlining the importance of a standardized formal training for physicians and nurses working in prehospital and in-patient EMSs. CONCLUSION: The VentilaMadrid study will provide valuable data on the clinical factors of patients receiving NIV in prehospital EMS. Further, were our hypothesis to be confirmed, our results would strongly suggest that the administration of NIV in prehospital EMS by medical and nursing profesionals formally trained in the technique reduces mortality and improves prognoses.

Myxoid liposarcoma: MRI features with histological correlation. / Liposarcoma mixoide: características por resonancia magnética con correlación histológica.

BACKGROUND AND AIMS: Myxoid liposarcoma is classified in the group of sarcomas with adipose differentiation, which is the second most common group of sarcomas. However, myxoid liposarcoma is not a homogeneous entity, because the behavior and clinical course of these tumors can vary widely. This study aimed to describe the magnetic resonance imaging (MRI) features of myxoid liposarcomas and to determine whether the MRI features are associated with the histologic grade and can differentiate between low-grade and high-grade tumors and thus help in clinical decision making. MATERIAL AND METHODS: We studied 36 patients with myxoid liposarcomas treated at our center between 2010 and 2018. We analyzed clinical variables (age, sex, and tumor site) and MRI features (size, depth, borders, fatty component, myxoid component, non-fatty / non-myxoid component, apparent diffusion coefficient (ADC), and type of enhancement after the administration of intravenous contrast material). We correlated the MRI features with the histologic grade and the percentage of round cells. RESULTS: In our series, patients with myxoid liposarcomas were mainly young adults (median age, 43 years). There were no differences between sexes; 97.2% were located in the lower limbs, 86.1% were deep, and 77.8% had well-defined borders. Of the 23 myxoid liposarcomas that contained no fat, 16 (69.6%) were high grade (p=0.01). All the tumors with a myxoid component of less than 25% were high grade (p=0.01); 83.3% of those with a non-fatty / non-myxoid component greater than 50% were high grade (p=0.03) and 61.5% had more than 5% round cells (p=0.01). Diffusion sequences were obtained in 14 of the 36 patients; ADC values were high (median, 2 x 10-3 mm2/s), although there were no significant associations between low-grade and high-grade tumors. Contrast-enhanced images were available for 30 (83.3%) patients; 83.3% of the tumors with heterogeneous enhancement were high grade (p=0.01). CONCLUSIONS: MRI can be useful for differentiating between high- and low-grade myxoid liposarcomas and can help in clinical decision making.

Relationship of quality parameters, antioxidant capacity and total phenolic content of EVOO with ripening state and olive variety.

The aim of this work was to study the evolution of quality parameters, fatty acid composition, antioxidant capacity and total phenolic content of olive oil obtained from two olive varieties (Manzanilla and Picual) with different maturation. Antioxidant capacity and total phenolic content were measured after submitting the olive oil to in vitro digestion and fermentation to mimic physiological conditions. Quality parameters were always within the legal limits to be called "Extra Virgin Olive Oil". Antioxidant capacity, total phenolic content, saturated fatty acids and monounsaturated fatty acids (MUFA) decreased along maturation, whereas polyunsaturated fatty acids (PUFA) increased in both varieties. Manzanilla showed higher PUFA content, whereas Picual had higher MUFA concentration, antioxidant capacity and total phenolic content. The fermented fraction of olive oil displayed a higher antioxidant capacity. Finally, the statistical approach demonstrated that the type of variety is more important than collection date regarding fatty acid composition and antioxidant capacity.

[Dynamic magnetic resonance imaging in the diagnosis of tumors and pseudotumors of the musculoskeletal system]. / Resonancia magnética dinámica en el diagnóstico de las lesiones tumorales y seudotumorales del sistema musculoesquelético.

The greater temporal resolution provided in ultrafast dynamic contrast-enhanced magnetic resonance imaging sequences makes it possible to know the physiological phenomenon of the distribution of the contrast material through a time-signal intensity curve. Analyzing these curves enables us to deduce information relevant to the vascularization and perfusion of tissues, capillary permeability, and the interstitial space in the tumor. A steep curve with early washout in a space-occupying lesion greatly increases the possibility of histological malignancy, although this type of curve is not rare in benign lesions and relatively flat curves are not rare in malignant tumors. Nevertheless, dynamic studies of the uptake of contrast material provide important information for the characterization of neoplasms that, together with the usual signs, can help to differentiate between benign and malignant tumors of adipocyte, chondroid, or neural lineage, clearing up diagnostic uncertainty in certain benign lesions such as osteoid osteoma and ischemic musculoskeletal disease. Furthermore, it enables the accurate determination of the response to chemotherapy, detecting recurrence within the treated tumor early, delimiting more precisely the margins between the tumor and peritumoral edema, and helping in diagnostic planning by determining the most vascularized areas of the tumor, which are more likely to be malignant.

Resonancia magnética dinámica en el diagnóstico de las lesiones tumorales y seudotumorales del sistema musculoesquelético / Dynamic magnetic resonance imaging in the diagnosis of tumors and pseudotumors of the musculoskeletal system

La mayor resolución temporal que ofrece la secuencia de imágenes ultrarrápidas de la resonancia magnética contrastada dinámica (RMD), permite conocer el fenómeno fisiológico de la distribución del contraste mediante una curva de intensidad de señal-tiempo (TIC), de cuyo análisis puede deducirse información relevante sobre la vascularización y perfusión tisular, la permeabilidad capilar y el espacio intersticial del tumor. El hallazgo de una curva de pendiente elevada con lavado precoz de contraste en una lesión ocupante de espacio aumenta sensiblemente la posibilidad de malignidad histológica, aunque no es raro el hallazgo de curvas de este tipo en lesiones histológicamente benignas y de curvas de perfil relativamente plano en tumores de reconocida malignidad. A pesar de todo, los estudios dinámicos de captación pueden aportar información de gran interés en el proceso de caracterización de las lesiones neoformativas, ayudando a los restantes datos semiológicos habituales a diferenciar las formas malignas de las benignas en las tumoraciones de estirpe adipocítica, condroide o neural, confirmando dudas diagnósticas en determinadas lesiones benignas como el osteoma osteoide y la patología isquémica osteomuscular, permitiendo determinar con precisión el grado de respuesta a la quimioterapia, detectando con precocidad la recidiva en el seno del tumor tratado, delimitando con mayor exactitud los márgenes del tumor frente al edema peritumoral y ayudando a la planificación diagnóstica al determinar las áreas más vascularizadas y, por tanto, más probablemente malignas del tumor (AU)

The greater temporal resolution provided in ultrafast dynamic contrast-enhanced magnetic resonance imaging sequences makes it possible to know the physiological phenomenon of the distribution of the contrast material through a time-signal intensity curve. Analyzing these curves enables us to deduce information relevant to the vascularization and perfusion of tissues, capillary permeability, and the interstitial space in the tumor. A steep curve with early washout in a space-occupying lesion greatly increases the possibility of histological malignancy, although this type of curve is not rare in benign lesions and relatively flat curves are not rare in malignant tumors. Nevertheless, dynamic studies of the uptake of contrast material provide important information for the characterization of neoplasms that, together with the usual signs, can help to differentiate between benign and malignant tumors of adipocyte, chondroid, or neural lineage, clearing up diagnostic uncertainty in certain benign lesions such as osteoid osteoma and ischemic musculoskeletal disease. Furthermore, it enables the accurate determination of the response to chemotherapy, detecting recurrence within the treated tumor early, delimiting more precisely the margins between the tumor and peritumoral edema, and helping in diagnostic planning by determining the most vascularized areas of the tumor, which are more likely to be malignant (AU)

Comparación entre pH-metría convencional e impedanciometría intraluminal multicanal en niños con patología respiratoria / Comparison between conventional ph measurement and multichannel intraluminal esophageal impedance in children with respiratory disorders

Introducción: El RGE se asocia a sintomatología respiratoria; se ha demostrado la relación entre el RGE no ácido y su etiopatogenia. La impedancia intraluminal multicanal esofágica (MII) es capaz de detectar RGE no ácido y alcalino, así como la altura de ascenso del reflujo. Objetivo: Comparar la eficacia en el diagnóstico de reflujo gastroesofágico ácido y no ácido de la pH-metría bicanal y la MII en pacientes con patología respiratorio. Pacientes y métodos: Estudio longitudinal, prospectivo de pacientes con diagnóstico de asma persistente al tratamiento, tos crónica o laringitis de repetición. Se realizó monitorización continua durante 24 h mediante MII-pH-metría doble canal y análisis descriptivo de los datos comparando ambas técnicas entre sí. Se realizó un análisis descriptivo y comparativo mediante la prueba de la t de Student y el test de MacNemar como prueba no paramétrica. Resultados: Entre septiembre 2008 y abril 2010 se incluyó a 49 pacientes con patología respiratoria (79,6% asma crónica, 10,2% tos crónica y 10,2% laringitis). La media de reflujos detectados por pH-metría fue de 18,3 (rango 0-93) y por MII de 39,2 (11-119) (p<0,001). El índice sintomático fue 6,7% por pH-metría y 13,9% por MII (p<0,05). El número de niños diagnosticados de RGE ácido por pH-metría fue de 7 y mediante MII se diagnosticaron 25 niños (8 ácidos, 10 alcalinos y 7 mixtos). La media de reflujos proximales detectados por MII fue de 21. Conclusiones: La MII es capaz de diagnosticar mayor número de reflujos tanto ácidos como alcalinos que la pH-metría convencional en los niños con patología respiratoria resistente al tratamiento, así como detectar reflujos proximales(AU)

Introduction: Gastroesophageal reflux (GER) is associated with respiratory symptoms. The link between non-acid GER and the pathogenesis of respiratory disease has been demonstrated. Esophageal multichannel intraluminal impedance (MII) is able to detect non-acid and alkaline GER, as well as reflux height. The objective of the study was to compare the diagnostic effectiveness of dual-channel pH-meter and MII. Patients and methods: A prospective study was conducted on patients diagnosed with uncontrolled asthma, persistent cough, or chronic laryngitis. Patients were monitored continuously for 24hours using a combination of MII and a dual-channel pH-meter. A descriptive and comparative analysis of the techniques was performed using the t test for comparison between groups and McNemar test for non-parametric data. Results: A total of 49 patients with respiratory disease between September 2008 and April 2010 (79.6% uncontrolled asthma, 10.2% persistent cough, and 10.2% chronic laryngitis) were included in the study. The mean number of refluxes detected was 18.3 (range 0-93) using the pH-meter and 39.2 (11-119) using MII (P<.001). Acid GER was detected using pH in 7 children and using MII in 25 children (8 acid, 10 alkaline and 7 mixed). A mean of 21 proximal refluxes were detected using MII. Conclusions: MII makes it possible to diagnose a greater number of refluxes, whether acid or alkaline, than conventional pH measurement in children with respiratory disease that is poorly controlled with their usual treatment. MII can also detect proximal refluxes(AU)

[Comparison between conventional ph measurement and multichannel intraluminal esophageal impedance in children with respiratory disorders]. / Comparación entre pH-metría convencional e impedanciometría intraluminal multicanal en niños con patología respiratoria.

INTRODUCTION: Gastroesophageal reflux (GER) is associated with respiratory symptoms. The link between non-acid GER and the pathogenesis of respiratory disease has been demonstrated. Esophageal multichannel intraluminal impedance (MII) is able to detect non-acid and alkaline GER, as well as reflux height. The objective of the study was to compare the diagnostic effectiveness of dual-channel pH-meter and MII. PATIENTS AND METHODS: A prospective study was conducted on patients diagnosed with uncontrolled asthma, persistent cough, or chronic laryngitis. Patients were monitored continuously for 24 hours using a combination of MII and a dual-channel pH-meter. A descriptive and comparative analysis of the techniques was performed using the t test for comparison between groups and McNemar test for non-parametric data. RESULTS: A total of 49 patients with respiratory disease between September 2008 and April 2010 (79.6% uncontrolled asthma, 10.2% persistent cough, and 10.2% chronic laryngitis) were included in the study. The mean number of refluxes detected was 18.3 (range 0-93) using the pH-meter and 39.2 (11-119) using MII (P<.001). Acid GER was detected using pH in 7 children and using MII in 25 children (8 acid, 10 alkaline and 7 mixed). A mean of 21 proximal refluxes were detected using MII. CONCLUSIONS: MII makes it possible to diagnose a greater number of refluxes, whether acid or alkaline, than conventional pH measurement in children with respiratory disease that is poorly controlled with their usual treatment. MII can also detect proximal refluxes.

Esofagitis eosinofílica / Eosinophilic esophagitis

La esofagitis eosinofflica es una enfermedad caracterizada por una infiltración anormal de eosinófilos en el esófago distal. Los síntomas, la mayoría de las veces, son indistinguibles de los del reflujo gastroesofágico, e incluyen vómitos, regurgitaciones, náuseas, dolor epigástrico y disfagia, con escasa respuesta a la medicación antirreflujo. Se presenta el caso de dos niñas con síntomas digestivos compatibles con reflujo gastroesofágico, sin antecedentes alérgicos de interés, con mala respuesta al tratamiento médico antirreflujo, que fueron diagnosticadas mediante esofagos gastroscopia y biopsia esofágica de esofagitis esosinofflica. Las pruebas alérgicas fueron positivas a determinados alimentos. Evolucionaron de forma adecuada con una dieta exenta de alérgenos

Eosinophilic esophagitis is a disease characterized by eosinophilic infiltration of the esophageal mucosa. The symptoms, in the majority of the cases, are indistinguishable from gastroesophageal reflux disease, and include vomiting, regurgitation, nausea, epigastric pain and dysphagia, but the patients rarely respond to antireflux therapy. We report the cases of two girls who presented gastrointestinal symptoms compatible with gastroesophageal reflux disease. They had no notable history of allergic reactions, but responded poorly to antireflux medication. Esophagogastroscoapny desophageabliops yrevealed the presence of eosinophilice sophagitis.The girls were found to be allergic to certain foods and showed a satisfactory improvement when these foods were eliminated from their diets

Collateral biliary circulation in portal hypertension syndrome.

OBJECTIVE: to describe collateral circulation in the gallbladder wall in relation with portal hypertension syndrome, and to determine whether this syndrome is frequently associated portal vein thrombosis. METHODS: images were retrospectively reviewed for 9 patients with previously diagnosed portal hypertension syndrome, in whom ultrasound results suggested the presence of varices of the cystic vein. RESULTS: four patients showed signs suggesting portal vein thrombosis. The gallbladder wall showed diffuse hypoechoic thickening in all patients, 7 of whom had intramural dilation of tubular, tortuous appearance. Ultrasound findings, however, were not very specific, and differential diagnosis with a large number of other entities is required to rule out other possible causes of focal and diffuse thickening of the gallbladder wall. The use of Doppler sonographic techniques made it possible to determine the cause of the varices, and to confirm suspicions of portal thrombosis. This method was found to be just as sensitive as ultrasound imaging, and much more specific. Angiograms obtained in 3 patients for different reasons confirmed the ultrasonographic findings in all cases. CONCLUSIONS: this study confirms the association between thromboses and varices, and analyzes the physiopathological hypotheses invoked to explain this association. We emphasize the need for correct diagnosis, given the frequency of surgical iatrogenic bleeding or misdiagnosis resulting from confusion with other possible causes of gallbladder wall thickening. Doppler ultrasound is considered the ideal diagnostic method as it is harmless, sensitive and specific.