Application of Ligilactobacillus salivarius SP36, a Strain Isolated from an Old Cheese Seal, as an Adjunct Culture in Cheesemaking.

Adjunct cultures originating from artisanal cheese environments may play an important role in recreating and developing traditional cheese flavours, thanks to their enzymatic activities, involved in different metabolic pathways that occur during cheese ripening. In this work, Ligilactobacillus salivarius SP36, a strain isolated from an old cheese seal, was added as an adjunct culture to the cheese's raw milk, and its effect on the microbiological, physical-chemical and sensory characteristics of the cheese was studied. The use of L. salivarius SP36 in cheese manufacturing had no significant (p > 0.05) effect on the cheese microbiota, gross composition (fat percentage, protein, total solids, moisture and NaCl concentration), colour or texture of the cheese. However, L. salivarius SP36 increased (p < 0.01) the formation of 25 volatile compounds, including 10 esters, 1 aldehyde, 8 alcohols and 6 carboxylic acids. In addition, cheeses made with L. salivarius SP36 received higher scores (p < 0.01) for aroma intensity and quality than control cheeses. L. salivarius SP36 proved to be a good candidate as an adjunct culture for cheesemaking, since it improved the cheese flavour by making it more intense and recovering typical sensorial notes of traditional cheeses.

Characterization of a Ligilactobacillus salivarius Strain Isolated from a Cheese Seal Which Was Last Used in 1936.

Cheesemaking played a pivotal role in the life of the Pyrenean villages where cheese was a most prized commodity and the subject of much local competition. In one of them (Sasa de Sobrepuerto), Mrs. Sebastiana Palacio decided in 1877 to label all the cheeses made in her household with a seal to differentiate them from those made by other local producers. The cheese seal was last used in 1936 and, since then, it has been kept under excellent storage conditions. Since well-preserved cheese seals are rare, and bacterial cells may survive desiccation for long periods, the objective of this work was to isolate and characterize any lactic acid bacteria that survived in the seal. Analysis of the milky crust material revealed the presence of sheep caseins. Culture-based analysis led to the isolation of a strain of Bacillus licheniformis and a strain of Ligilactobacillus salivarius (L. salivarius SP36). The latter was characterized in vitro for safety and dairy-related functional properties. Its genome encodes several genes involved in protein, peptide, and amino acid catabolism, and flavor. Overall, the phenotypic and genetic features of this strain support a high potential for being used as adjunct culture in cheesemaking.

Composition and Functional Properties of the Edible Spear and By-Products from Asparagus officinalis L. and Their Potential Prebiotic Effect.

Asparagus is a healthy food appreciated for its organoleptic characteristics, nutritional composition and physiological properties. During its industrial processing, a large amount of by-products are generated, since only the apical part of the vegetable is considered edible and a large amount of by-products are generated that could be of nutritional interest. Therefore, the nutritional composition of the edible part and the two by-products of the plant (root and stem) was evaluated, including dietary fiber, inulin, low-molecular-weight carbohydrates, low-molecular-weight polyphenols and macromolecular polyphenols. The hydration properties, oil retention capacity, glucose retardation index and impact on bacterial growth of both probiotic bacteria and pathogenic strains were determined. All samples were high in fiber (>22 g/100 g dw), fructans (>1.5 g/100 g dw) and polyphenolic compounds (>3 g/100 g dw) and had good water-, oil- and glucose-binding capacity. In addition, they promoted the growth of probiotic strains but not pathogenic ones. The effects were more pronounced in the spear by-product samples and appear to be related to the components of dietary fiber. The results indicate that edible spear has potential beneficial effects on host health and microbiota when ingested as part of a healthy diet, while the by-products could be used as supplements and/or as natural ingredients in fiber-enriched foods that require emulsification and are intended to achieve a prebiotic effect.

Evaluation of Safety and Beneficial Health Effects of the Human-Milk Strain Bifidobacterium breve DSM32583: An Infant Pilot Trial.

Human milk promotes the growth of bifidobacteria in the infant gut. Adding bifidobacterial species to infant formula may contribute to increasing their presence in the gut of formula-fed infants. Therefore, the safety and anti-infectious effects of Bifidobacterium breve DSM32583, a breast milk isolate, were assessed in a pilot trial involving 3-month-old infants. The infants were randomly assigned to either the probiotic (PG) or the control (CG) groups. All the infants consumed the same formula, although it was supplemented with the strain (1 × 107 cfu/g of formula) in the PG. Overall, 160 infants (80 per group) finished the intervention. Infants in CG gained more weight compared to PG (p < 0.05), but the weights for age Z-scores at 6 months were within the normal distribution for this age group. The rates of infections affecting the gastrointestinal and respiratory tracts and antibiotic therapy were significantly lower in the PG. The bifidobacterial population and the level of short-chain fatty acids were higher (p < 0.05) in the fecal samples of PG infants. No adverse events related to formula consumption were observed. In conclusion, the administration of an infant formula with B. breve DSM32583 was safe and exerted potential beneficial effects on gut health.

A gut microbiome signature for HIV and metabolic dysfunction-associated steatotic liver disease.

Introduction: Metabolic dysfunction-associated steatotic liver disease (MASLD), has emerged as an increasingly recognized problem among people living with HIV (PLWH). The gut-liver axis is considered to be strongly implicated in the pathogenesis of MASLD. We aimed to characterize the gut microbiota composition in PLWH and MASLD and compare it with that of two control groups: PLWH without MASLD and individuals with MASLD without HIV infection. Methods: We collected clinical data and stool samples from participants. Bacterial 16S rRNA genes were amplified, sequenced, and clustered into operational taxonomic unit. Alpha diversity was studied by Shannon and Simpson indexes. To study how different the gut microbiota composition is between the different groups, beta diversity estimation was evaluated by principal coordinate analysis (PCoA) using Bray-Curtis dissimilarity. To further analyze differences in microbiome composition we performed a linear discriminant analysis (LDA) effect size (LEfSe). Results: We included 30 HIV+MASLD+, 30 HIV+MASLD- and 20 HIV-MASLD+ participants. Major butyrate producers, including Faecalibacterium, Ruminococcus, and Lachnospira dominated the microbiota in all three groups. Shannon's and Simpson's diversity metrics were higher among MASLD+ individuals (Kruskal-Wallis p = 0.047). Beta diversity analysis showed distinct clustering in MASLD-, with MASLD+ participants overlapping regardless of HIV status (ADONIS significance <0.001). MASLD was associated with increased homogeneity across individuals, in contrast to that observed in the HIV+NAFDL- group, in which the dispersion was higher (Permanova test, p value <0.001; ANOSIM, p value <0.001). MASLD but not HIV determined a different microbiota structure (HIV+MASLD- vs. HIV+MASLD+, q-value = 0.002; HIV-MASLD+ vs. HIV+MASLD+, q-value = 0.930; and HIV-MASLD+ vs. HIV+MASLD-, q-value < 0.001). The most abundant genera in MASLD- were Prevotella, Bacteroides, Dialister, Acidaminococcos, Alloprevotella, and Catenibacterium. In contrast, the most enriched genera in MASLD+ were Ruminococcus, Streptococcus, Holdemanella, Blautia, and Lactobacillus. Conclusions: We found a microbiome signature linked to MASLD, which had a greater influence on the overall structure of the gut microbiota than HIV status alone.

Tumor desmoide abdominal gigante en puerperio: caso clínico y revisión de la literatura / Giant abdominal desmoid tumor during the puerperium: Case report and review of literature

Introducción. Los tumores desmoides o fibromatosis agresiva corresponden a neoplasias mesenquimales poco frecuentes. Son tumores localmente agresivos que ocurren especialmente en jóvenes, no desarrollan metástasis a distancia, pero se asocian con invasión locorregional y alta tasa de recurrencia después de la resección. Su etiología es desconocida, pero se ha asociado al síndrome de Gardner, trauma, embarazo, estados hiperestrogénicos y puerperio. El objetivo de este artículo fue hacer una revisión sobre el tema a propósito de un caso clínico. Caso clínico. Se presenta el caso de una paciente puérpera con progresivo y rápido aumento del volumen abdominal. Se realizó una tomografía computarizada de abdomen y pelvis que confirmó la presencia de una masa intraperitoneal bien definida. La paciente fue operada con escisión de la masa y confirmación histológica de tumor desmoide a partir de la muestra de patología. Discusión. Los tumores desmoides tienen una incidencia de 2 a 4 casos por millón de habitantes por año, con leve predominio en el sexo femenino y representan menos del 3 % de los tumores de partes blandas. Aunque el tumor se puede ubicar a nivel intraabdominal o en la pared, la ubicación más común es en las extremidades. Conclusiones. La sospecha y detección del tumor desmoide es fundamental, así como su adecuado estudio, para determinar el tratamiento quirúrgico como fue realizado en este caso

Introduction. Desmoid tumors or aggressive fibromatosis correspond to rare mesenchymal neoplasms. They are locally aggressive tumors that occur especially in young people, they do not develop distant metastases, but are associated with locoregional invasion and a high recurrence rate after resection. Its etiology is unknown, but it has been associated with Gardner syndrome, trauma, pregnancy, hyperestrogenic states, and puerperium. The objective of this article was to review the topic based on a clinical case. Clinical case. The case of a puerperal patient with progressive and rapid increase in abdominal volume is presented. An abdominal and pelvic CT scan was performed, which confirmed the presence of a well-defined intraperitoneal mass. The patient underwent surgery with excision of the mass and histological confirmation of a desmoid tumor from the pathology sample. Discussion. Desmoid tumors have an incidence of 2 to 4 cases per million inhabitants per year, with a slight predominance in females, and represent less than 3% of soft tissue tumors. Although the tumor can be located intra-abdominal or in the wall, the most common location is in the extremities. Conclusions. The suspicion and detection of the desmoid tumor is essential, as well as its adequate study to determine the surgical treatment as it was done in this case

Concordancia Interobservador para la Validación del PI-RADS v2 / Interobserver Agreement for the PI-RADS v2 Validation

Objetivo Evaluar la variabilidad interobservador en el uso de la versión 2.0 del PI- RADS (PI-RADS v2), en lectores experimentados y no experimentados. Materiales y Métodos Estudio retrospectivo de análisis de concordancia de lectores. Entre enero de 2015 y diciembre de 2016, 1.656 sujetos fueron estudiados mediante resonancia magnética multiparamétrica (RMmp) de próstata en nuestra institución. Se estimó la distribución porcentual del reporte en categoría PI-RADS v2, y con esa información, se realizó una selección de 150 casos con esquema de aleatorización estratificada a las distribuciones porcentuales de cada categoría. Dichos casos fueron anonimizados, presentados a tres lectores con cinco, cuatro y dos años de experiencia en lectura de RMmp además de tener más de un año de experiencia en el uso del PI- RADS v2 siendo leídos en forma individual. Los datos resultantes fueron analizados en forma independiente por un cuarto investigador. Resultados El valor de kappa ponderado para los observadores fue de 0,69 (IC 95: 0,64 a 0,75). La mayor concordancia correspondió a los lectores de mayor experiencia, donde alcanza un valor de 0,72 (IC 95%: 0,69 a 0,76). La concordancia entre los valores PI-RADS que determinan seguimiento o bien una intervención de acuerdo a elementos clínicos (1-2-3) y conducta activa (4-5) correspondió a 0,70 (IC 95%: 0,59 a 0,78). Discusión Se logró demostrar un acuerdo sustancial entre radiólogos utilizando el PI- RADS v2 para la detección en RMmp de lesiones sospechosas, mayor entre los dos lectores más experimentados. Sin embargo, la comparación del lector de menor experiencia con los de mayor experiencia también presentó una importante concordancia. Los valores de concordancia entre observadores para PI-RADS 2:4 fueron similares a los reportados en la literatura. Conclusiones El PI-RADSv2 ha demostrado en nuestro centro, con radiólogos dedicados a imágenes de abdomen y estudios de próstata, un alto nivel de acuerdo en la interpretación de la RMmp de próstata, encontrándose a tono con lo reportado en la literatura.

Purpose To evaluate the interobserver variability in the use of the PI-RADS 2.0 version, in experienced and non-experienced readers. Material and Methods Retrospective studyof readers' concordance analysis. Between January 2015 and December 2016, 1656 subjects were studied through multiparametric MRI (RMmp) of prostate in our institution. The percentage distribution of the report was estimated in each PI-RADS category, and a selection of 150 cases with a stratified randomization scheme was made to the percentage distributions of every category. These cases were anonymized, presented to three readers with 5, 4 and 2 years' experience in reading RMmp, and more than one-year experience with PI-RADS v2, and were read individually. The resulting data were analyzed independently by a fourth investigator. Results The weighted kappa value for the observers was 0.69 (IC 95: 0.64 to 0.75). The highest agreement corresponded to the two most experienced readers, where it reached a value of 0.72 (95% CI: 0.69 to 0.76). The concordance between the PI-RADS values that determine follow-up (1-2-3) and active behavior (4-5) corresponded to 0.70 (95% CI: 0.59 to 0.78). Discussion It was possible to demonstrate a substantial agreement between radiologists using the PI-RADS v2 for the detection in RMmp of suspicious lesions, greater among the two most experienced readers. However, the comparison of the less experienced reader with those of greater experience also presented an important concordance. The inter-observer concordance values for PI-RADS 2:4 were like those reported in the literature. Conclusions The PI-RADS v2 has demonstrated, in our center, with radiologists dedicated to abdominal images and prostate studies, a high level of agreement in the interpretation of prostate MRmp.

Presentación atípica de neoplasia pulmonar: lesiones quísticas pulmonares "no siempre benignas" / Lung cancer presenting as cystic lesions: report of eight cases

Background:: Pulmonary cystic nodules are a relatively frequent finding in chest computed tomography (CT). There is a possible association between this finding and lung cancer. Aim: To report eight patients with malignant lung cystic lesions. Material and Methods: Retrospective analysis of images in a CT database from 2007 to 2015, looking for cystic lesions of the lung with wall thickening, whose pathological diagnosis was lung cancer. Results: We identified eight patients with cystic nodules aged 44 to 77 years, of which five were women. Six were active and two former smokers. The pathological diagnosis was adenocarcinoma in seven cases and squamous cell in one. The mean diameter of the cystic lesions was 11.5 mm. The mean diagnostic delay time was 871 days (range 0-1592). The main finding was a gradual thickening of the nodule walls. Conclusions: The presentation of lung cancer as cystic nodules is uncommon. In this series, the change in morphology due to a thickening of the walls with or without a diameter increase, was the clue for the diagnosis.

Correlación en la determinación de la edad ósea radiológica mediante el método de Greulich y Pyle versus la evaluación automatizada utilizando el software BoneXpert / Correlation in radiological bone age determination using the Greulich and Pyle method versus automated evaluation using BoneXpert software

Resumen: Objetivo: Determinar el grado de correlación en la valoración de la edad ósea radiológica mediante el método de Greulich y Pyle versus la evaluación automatizada por el programa computacional BoneXpert® entre los años 2013-2016. Material y Método: Estudio de correlación de técnicas diag nósticas de 1500 radiografías de carpo para evaluar la edad ósea, en pacientes menores de 16 años pertenecientes a Clínica Alemana de Santiago. Las radiografías con evaluación de la edad ósea por el Atlas de Greulich y Pyle (GP) por 1 de 7 radiólogos pediatras fueron sometidas al programa BoneX pert (BE) para la evaluación automatizada de la edad ósea. Se tomó 100 casos al azar para un análisis/ re-análisis del método BE, para conocer su precisión. Se analizó el nivel de correlación de las medicio nes por coeficiente de correlación (r de Pearson) y la variabilidad de las mediciones mediante análisis de Bland-Altman. Resultados: Se incluyeron 1.493 casos, se excluyeron 7 por falla en técnica de la radiografía, 922 de sexo femenino (61.8%), mediana de edad cronológica 9.96 años y 11.12 años para los varones (p 0,001). La correlación entre la edad ósea manual GP y la edad ósea automatizada BE entre los lectores varió entre 0,91 y 0,93. El análisis de Bland-Altman indicó una diferencia promedio entre la edad ósea manual y la edad ósea BE de 0,19 años (IC 0,13 a 0,25). En el análisis/re-análisis de 100 casos al azar mediante BoneXpert, la correlación fue de 1,0. Conclusión: El análisis automatizado mediante BoneXpert permite una evaluación estandarizada, de baja variabilidad, y alta concordancia.

Abstract: Objective: To determine the degree of correlation in the radiological bone age assessment using the Greulich and Pyle method versus automated assessment through BoneXpert® software between 2013 and 2016. Material and Method: Correlation study of diagnostic techniques of 1500 carpal X-rays to assess bone age in patients under 16 years of age from Clínica Alemana de Santiago. X-rays with bone age assessment using the Atlas of Greulich and Pyle (GP) by 1 out of 7 pediatric radiologists, were analyzed using the BoneXpert (BE) software for automated bone age assessment. 100 cases were taken at random for analysis/re-analysis using the BoneXpert method to determine its accuracy. The level of correlation of the measurements was analyzed using the correlation coefficient (Pearson's r) and the variability of the measurements using the Bland-Altman analysis. Results: 1493 cases were assessed, seven were excluded due to failure in the X-ray technique, 922 females (61.8%), with a median chronological age of 9.96 years and 11.12 years for males (p 0.001). The correlation between manual bone age (GP) and automated bone age using BoneXpert method among radiologists ran ged from 0.91 to 0.93. The Bland-Altman analysis indicated an average difference between manual bone age and bone age using the BoneXpert method of 0.19 years (CI 0.13 to 0.25). In the analysis/ re-analysis of 100 random cases using the BoneXpert software, the correlation was 1.00 (100% accu racy). Conclusion: The automated analysis using BoneXpert allows for standardized, low-variability, and high-concordance assessment.

Neuroblastoma infantil: características clínicas, tratamento e prognóstico / Infant neuroblastoma: clinical characteristics, treatment and prognosis

Introdução: O neuroblastoma é a mais prevalente neoplasia abdominal pediátrica com um impacto de 15% da mortalidade total por causa oncológica nessa população. Este trabalho tem como objetivo estabelecer os critérios que levam à suspeição, diagnóstico e tratamento deste tumor. Métodos: Elaborado estudo de revisão bibliográfica entre as principais fontes científicas, realizando uma análise comparativa entre os artigos estudados, desconsiderando informações defasadas ou artigos com baixo impacto científico. Resultados: Este trabalho conseguiu reunir as principais informações acerca do neuroblastoma, possibilitando que este artigo sirva como fonte de estudo para profissionais da saúde. Conclusão: Deve-se suspeitar do diagnóstico de neuroblastoma quando a anamnese e o exame físico estiverem associados ao efeito de massa e a síndromes paraneoplásicas. Apesar do neuroblastoma ser uma doença de métodos diagnósticos e tratamento há muito estabelecidos, novos protocolos de estadiamento têm surgido, aderindo novas informações acerca de fatores de risco e predisposições genéticas.

Introduction: Neuroblastoma is the most prevalent abdominal neoplasia among pediatric patients, with an impact of 15% of total mortality of oncologic causes in this population. This article aims to identify the criteria that leads to the suspicion, diagnosis and treatment of the tumor. Methods: We reviewed works in several databases, while doing a comparative analysis of the chosen articles, excluding outdated or with low scientific impact information. Results: This article has managed to summarize the main information about neuroblastoma, allowing it to serve as a go-to source for health professionals. Conclusion: The diagnosis of neuroblastoma should be suspected when anamnesis and physical examination are associated with mass effect and paraneoplastic syndromes. Despite neuroblastoma being a disease with diagnostic methods and treatment long established, new protocol of staging have been emerging, adding new information about risk factors and genetic predispositions.

Adenocarcinoma de cólon: tratamento cirúrgico e quimioterápico / Colon adenocarcinoma: surgical and chemotherapic treatment

Introdução: Esta revisão bibliográfica buscou analisar a literatura pertinente à abordagem cirúrgica e clínica do adenocarcinoma de cólon. Métodos: Foram revisados artigos em bases de dados ­ Pudmed, Medscape e UptoDate ­ e excluídos aqueles com pouca relevância clínica ou baixo de grau de evidência. Resultados: O tratamento do adenocarcinoma de cólon visando a cura é baseado na abordagem cirúrgica. Em estádio iniciais (I e II, sem acometimento linfonodal) o tratamento cirúrgico exclusivo é a indicação atual, sendo restrito o tratamento quimioterápico adjuvante para estádios mais avançados ou pacientes estádio II de alto risco. Devem-se individualizar os casos, às vezes recorrendo-se ao tratamento paliativo. Conclusão: A principal abordagem curativa para adenocarcinoma de cólon é cirúrgica, porém pode-se recorrer à terapia adjuvante quando necessário. No momento não parecem haver dados suficientes para formulação de diretriz com tratamento neoadjuvante.

Introduction: This review sought to analyze the literature pertinent to the surgical and clinical approaches to colon adenocarcinoma. Methods: Review of articles from databases ­ Pubmed, Medscape and UptoDate ­ those little clinical relevance or low clinical relevance or low degree of evidence. Results: The curative treatment of the colon adenocarcinoma is based on the surgical approach. In initial stages (I and II, with no lymph node involvement) the exclusive surgical treatment is the current indication, with adjuvant chemotherapy being restricted to more advanced staging or patients with high-risk stage II disease. Cases must be individualized, sometimes relying on palliative treatment. Conclusion: The main curative approach to colon adenocarcinoma is surgical, however, adjuvant therapy can be relied upon when necessary. At the moment, there do not seem to be enough data for the formulation of guidelines for neoadjuvant treatment.

Signo radiológico: signo de Luftsichel / Radiology sign: the Luftsichel sign

Abstract. The Luftsichel sign corresponds to a crescent-shaped paraaortic hyperlucency in frontal chest radiograph caused by the collapse of the left upper lobe. Its recognition is relevant, especially in adult patients, where we should considered an endobronchial neoplasia as the first possible etiology of the lobar collapse. The differential diagnosis includes the right lung herniation through the midline, medial pneumothorax, pneumomediastinum and bullous disease.

Resumen. El signo de Luftsichel corresponde a una hiperclaridad paraaórtica en forma de creciente en la radiografía de tórax frontal, causado por el colapso del lóbulo superior izquierdo. Su reconocimiento es importante, sobre todo en el paciente adulto, en donde se debe considerar una neoplasia endobronquial como primera posibilidad etiológica del colapso lobar. El diagnóstico diferencial incluye herniación del pulmón derecho a través de la línea media, neumotórax medial, neumomediastino y enfermedad bulosa.

Distorsión de la arquitectura mamaria: la mejor forma de enfrentarla / Distorsion of breast architecture: the best way to confront it

Abstract: Objective. Assess the performance of digital 2D mammography and tomosynthesis in the characterisation of architectural breast distortion (ABD). Material and method. A retrospective study, approved by the Ethics Committee, was conducted on mammographic studies on cases with a diagnosis of ABD selected from August 2015-August 2016. Cases with imaging modalities available on PACS were included: digital mammography (2D), tomosynthesis (TS), ultrasound (US), magnetic resonance (MR), and with biopsy performed at our institution. ABD cases associated with micro-calcifications and post-surgical changes were excluded. Detection rates and imaging characteristics were analysed, as well as the histopathological concordance. Results. A total of 81 cases of ABD without microcalcifications were detected on the mammographs, but only 52 met the inclusion criteria. According to histopathology, 23 (44%) were malignant, 17 (33%) were benign, and 12 (23%) were high-risk lesions. All were detected by TS and US, and classified as suspicious lesions (BI-RADS 4 or 5). In 2D mammography, 24 cases (46%) were not seen and 8 (33%) of these were malignant. Malignant lesions showed dense centres in 87% of cases. The most frequent lesion on ultrasound was a hypoechogenic area (60%) in 86% of lesions with penetrating vessels. A total of 21 MRI were performed, with mass enhancement being identified in all of them. Conclusion. ABD is better displayed in TS than 2D mammography. Despite its characteristics, histological examination is essential (even when a radiolucent centre is observed). Focused US should be the next procedure to follow, since it allows to visualize the lesion to be visualised, and can direct the percutaneous biopsy in most cases.

Resumen: Objetivo. Determinar en qué método de imagen se logra visualizar y caracterizar mejor una distorsión de la arquitectura mamaria (DAM). Material y método. Estudio retrospectivo, aprobado por el Comité de Ética. Se seleccionaron los estudios mamográficos con diagnóstico de DAM en nuestro servicio entre agosto de 2015 y agosto de 2016. Se incluyeron casos estudiados con al menos 3 de las modalidades de imágenes disponibles en PACS: mamografía digital (2D), tomosíntesis (TS), ecografía (US), resonancia (RM) y que fueron biopsiados en nuestra institución. Se excluyeron casos de DAM asociadas con microcalcificaciones y cambios posquirúrgicos. Se evaluaron la tasa de detección, las características imagenológicas y la concordancia histopatológica. Resultados. En 15 meses se detectaron 81 casos de DAM en mamografía; de estos, 52 cumplieron con los criterios de inclusión. Según la histopatología, 23 (44%) resultaron malignas, 17 (33%) benignas y 12 (23%) lesiones de alto riesgo (LAR). Todas fueron detectadas por TS y US, clasificadas como lesiones sospechosas (BI-RADS 4 o 5). En mamografía 2D, 24 casos (46%) quedaron ocultos, y de estos, 8 (33%) resultaron malignos. Las lesiones malignas presentaron centro denso en el 87% de los casos. La lesión más frecuente en ecografía fue el área hipoecogénica (60%), en el 86% de las lesiones con vasos penetrantes. Se contó con 21 RM, identificándose captación tipo masa en las patologías malignas. Conclusión. La DAM es mejor visualizada en TS que en mamografía 2D. Pese a sus características, un estudio histológico es indispensable (incluso al observar un centro radiolúcido). El US dirigido es el paso a seguir, ya que permite visualizar la lesión y dirigir su biopsia percutánea en la mayoría de los casos.

Autoría en artículos biomédicos: el caso de imaginología / Authorship in biomedical articles: the case of imaging

The definition of authorship is a subject of ongoing discussion wherein elements of prestige and academic career are involved. As a potential source of conflicts, it must be handled with extreme strictness to avoid difficulties when presenting scientific outcomes. Both a review of international standards relating to regarding authorship, accepted to date, and the position of the editorial board of the Revista Chilena de Radiología are presented.

La definición de autoría es un tema de discusión permanente, donde se ven involucrados elementos de prestigio y carrera académica. Siendo una potencial fuente de conflictos, debe ser manejado con extrema rigurosidad, para evitar dificultades al momento de presentar resultados científicos. Se presenta una revisión de los criterios internacionales referidos a autoría, aceptados a la fecha, y la postura del cuerpo editorial de la Revista Chilena de Radiología.

Erosión y migración intragástrica de la banda gástrica como complicación de la cirugía bariátrica. Caso clínico y revisión de la literatura médica / Gastric band erosion as complication of bariatric surgery. Case report and review of the literature

La técnica de banda gástrica se ha convertido actualmente en un procedimiento frecuente dentro de las variantes de la cirugía bariátrica. La posibilidad de utilizar una vía laparoscópica, logrando un buen resultado técnico y con bajas tasas de complicaciones han transformado este procedimiento en una de las técnicas más empleadas en Chile para el manejo quirúrgico de la obesidad mórbida. Presentamos el caso de una complicación infrecuente de esta técnica, la cual si no se diagnostica oportunamente, podría asociarse con una gran morbilidad e incluso mortalidad. Nos referimos a la erosión de banda gástrica con migración intragástrica. Es muy importante que los radiólogos, los gastroenterólogos y los cirujanos puedan reconocer esta entidad, con el fin de lograr un diagnóstico oportuno

Gastric banding has become a common procedure amongst bariatric surgery techniques. Because of the possibility of using a laparoscopic route to achieve a good technical result and low complication rates, this method has become the most frequently used options in the treatment of morbid obesity in Chile. We report an uncommon complication that, if left undiagnosed, could lead to considerable morbidity and even mortality: gastric band erosion and intragastric migration. Radiologists, gastroenterologists and surgeons should be able to recognize this event to provide a prompt diagnosis

Manejo activo del parto en primíparas: estudio prospectivo / Active management of labor in primiparas: prospective study

El objetivo de nuestro trabajo fue comparar el efecto en el índice de cesárea del manejo activo del parto y del manejo tradicional del parto en primíparas con embarazo de término fisiológico. Desde el 1 de septiembre de 1993, hasta el 31 de mayo de 1994, 145 primíparas con embarazo de término fisiológico fueron asignadas aleatoriamente a un grupo de manejo activo del parto (grupo de estudio; n=75) y a un grupo de manejo tradicional del parto (grupo control; n=70). La incidencia de cesárea fue de 9,3 por ciento en el grupo de estudio y 20 porciento en el grupo control (p<0,05). No hubo aumento en la morbilidad ni mortalidad fetal. El manejo activo del parto puede disminuir la incidencia de cesárea en primíparas con embarazo de término fisiológico