Knowledge, attitudes, and behavior regarding antibiotics, antibiotic use, and antibiotic resistance in students and health care professionals of the district of Barranquilla (Colombia): A cross-sectional survey.

Objective: To evaluate the knowledge, attitudes and behavior regarding antibiotics, use of antibiotics, and antibiotic resistance in students and health care professionals of the district of Barranquilla, Colombia. Study design: Descriptive, cross-sectional. Methods: A sample of 399 respondents was selected, that included health professionals and medical students from 12 health institutions in the district of Barranquilla (Colombia), using an established stratified sampling method. Each of the respondent professionals completed a survey that included 43 items in the Likert scale. A descriptive analysis of the study variables was performed using the software SPSS version 25. Results: Most of the respondents were women (64.4%), aged between 26 and 35 years (47.6%); 28.8% were nurses and 26.1% general practitioners, with ≤10 years of professional experience (63.4%). Overall, the survey revealed that the participants had considerable knowledge about antibiotic use (89.5%-98% correct answers) and the spread of antibiotic resistance (67.4%-89% correct answers). Approximately 74% of the respondents agreed or fully agreed with the questions related to the management of infections and the provision of advice. Conclusions: The present study revealed that most of the health care professionals surveyed had a good knowledge about antibiotic use, although strategies must be developed to strengthen knowledge regarding the spread of antibiotic resistance. Likewise, it is important to identify opportunities for improvement related with access to the guidelines and/or materials necessary to treat infections and to provide advice on antibiotic use and antibiotic resistance.

Mastitis granulomatosa: caso clínico y revisión de la literatura / Granulomatous mastitis: case report and literature review

OBJETIVO: La mastitis granulomatosa es una patología mamaria benigna y crónica de baja incidencia, cuyo diagnóstico es complejo y su tratamiento no está del todo establecido. Se presenta un caso clínico con el objetivo de hacer una revisión de la bibliografía sobre esta patología, su diagnóstico y tratamiento. MATERIAL Y MÉTODOS: Se presenta el caso de una paciente de 30 años con una mastitis refractaria a tratamiento antibiótico a la que finalmente se diagnosticó una mastitis granulomatosa idiopática gracias a la biopsia excisional. El tratamiento con corticoides a dosis altas tuvo buenos resultados en este caso. Se realizó una búsqueda bibliográfica en las bases de datos Medline vía PubMed, EMBASE y SciELO y también en libros de texto en papel. RESULTADOS: Se hallaron 598 referencias, la mayoría de ellas revisiones sistemáticas y casos clínicos. CONCLUSIONES: La mastitis granulomatosa es una patología poco frecuente cuyo diagnóstico se logra mediante estudio histológico de la misma. No hay consenso sobre cuál es el tratamiento óptimo, pero la tendencia actual es el tratamiento conservador con corticoides a altas dosis. Cada vez es más frecuente el uso de metotrexato cuando no hay buena respuesta con el tratamiento con corticoides.

OBJECTIVE: Granulomatous mastitis is a benign and chronic breast pathology with a low incidence, whose diagnosis is complex and its treatment is not fully established. A case report is presented with the aim of reviewing the literature on this pathology, its diagnosis and its treatment. MATERIAL AND METHODS: The patient is a 30-year-old woman with a mastitis refractory to antibiotic treatment. Finally, idiopathic granulomatous mastitis was diagnosed through excisional biopsy. Treatment with high-dose corticosteroids had good results in this patient. A literature search was performed in the Medline databases via PubMed, EMBASE and SciELO and also in paper textbooks. RESULTS: 598 references were found, most of them systematic reviews and case reports. CONCLUSIONS: Granulomatous mastitis is an uncommon pathology whose definitive diagnosis is achieved by histological study. Treatment is not fully established, but conservative treatment with high-dose corticosteroids is the current trend. The use of methotrexate has risen when there is no good evolution with corticosteroid treatment.

Prediction of Egg Weight from External Egg Traits of Guinea Fowl Using Multiple Linear Regression and Regression Tree Methods

The study was done to predict egg weight from the external traits of the Guinea fowl egg using the statistical methods of multiple linear regression (MLR) and regression tree analysis (RTA). A total of 110 eggs from a flock of 23-week-old Guinea fowl were evaluated. Egg weight (EW) and external traits: eggshell weight (ESW), egg polar diameter (EPD), egg equatorial diameter (EED), egg shape index (ESI), and egg surface area (ESA) were measured. Descriptive statistics, Pearson correlation coefficients, and regression equations using the MLR were obtained; additionally, a RTA was done using the CHAID algorithm with the SPSS software (IBM ver. 22). EW presented positive correlations (p 59.03 cm2 and a polar diameter > 5.10 cm. The proposed statistical methods can be used to reliably predict the egg weight of Guinea fowl.

Prediction of Egg Weight from External Egg Traits of Guinea Fowl Using Multiple Linear Regression and Regression Tree Methods

The study was done to predict egg weight from the external traits of the Guinea fowl egg using the statistical methods of multiple linear regression (MLR) and regression tree analysis (RTA). A total of 110 eggs from a flock of 23-week-old Guinea fowl were evaluated. Egg weight (EW) and external traits: eggshell weight (ESW), egg polar diameter (EPD), egg equatorial diameter (EED), egg shape index (ESI), and egg surface area (ESA) were measured. Descriptive statistics, Pearson correlation coefficients, and regression equations using the MLR were obtained; additionally, a RTA was done using the CHAID algorithm with the SPSS software (IBM ver. 22). EW presented positive correlations (p<0.0001) with ESA (r = 0.72), EPD (r = 0.65), and EED (r = 0.49). EW can be predicted through MLR using ESA as a predictor variable (R2 = 72%). Predictive accuracy improves when adding EPD and EED traits to the model (R2 = 75%). The RTA built a diagram using ESA, EED, and EPD as significant independent variables; of these, the most important variable was ESA (F = 50,295, df1 = 4, and df2 = 105; Adj. p<0.000) and the variation explained for EW was 74%. Likewise, the RTA showed that the highest egg weight (41.818 g) is obtained from eggs with a surface area > 59.03 cm2 and a polar diameter > 5.10 cm. The proposed statistical methods can be used to reliably predict the egg weight of Guinea fowl.(AU)

Delay time of waves performing Lévy walks in 1D random media.

The time that waves spend inside 1D random media with the possibility of performing Lévy walks is experimentally and theoretically studied. The dynamics of quantum and classical wave diffusion has been investigated in canonical disordered systems via the delay time. We show that a wide class of disorder-Lévy disorder-leads to strong random fluctuations of the delay time; nevertheless, some statistical properties such as the tail of the distribution and the average of the delay time are insensitive to Lévy walks. Our results reveal a universal character of wave propagation that goes beyond standard Brownian wave-diffusion.

Mitogenome of the blood feeding leech Haementeria acuecueyetzin (Hirudinida: Glossiphoniidae) from Tabasco, Mexico.

Here, we present the mitogenome of the blood feeding leech Haementeria acuecueyetzin (Hirudinida: Glossiphoniidae) based on specimens collected in Tabasco, Mexico. The circular genome is 14,985 bp in length, and consists of 13 protein-coding genes, 22 tRNA genes, two rRNA genes, and an AT-rich control region. Phylogenetic analysis based on the 13 protein-coding genes and two rRNA genes places H. acuecueyetzin sister to H. officinalis within the family Glossiphoniidae. Mitochondrial gene order in H. acuecueyetzin is consistent with other members of Clitellata with no evidence of gene gain/loss, duplication, or rearrangement.

A NodD-like protein activates transcription of genes involved with naringenin degradation in a flavonoid-dependent manner in Herbaspirillum seropedicae.

Herbaspirillum seropedicae is an associative, endophytic non-nodulating diazotrophic bacterium that colonises several grasses. An ORF encoding a LysR-type transcriptional regulator, very similar to NodD proteins of rhizobia, was identified in its genome. This nodD-like gene, named fdeR, is divergently transcribed from an operon encoding enzymes involved in flavonoid degradation (fde operon). Apigenin, chrysin, luteolin and naringenin strongly induce transcription of the fde operon, but not that of the fdeR, in an FdeR-dependent manner. The intergenic region between fdeR and fdeA contains several generic LysR consensus sequences (T-N11 -A) and we propose a binding site for FdeR, which is conserved in other bacteria. DNase I foot-printing revealed that the interaction with the FdeR binding site is modified by the four flavonoids that stimulate transcription of the fde operon. Moreover, FdeR binds naringenin and chrysin as shown by isothermal titration calorimetry. Interestingly, FdeR also binds in vitro to the nod-box from the nodABC operon of Rhizobium sp. NGR234 and is able to activate its transcription in vivo. These results show that FdeR exhibits two features of rhizobial NodD proteins: nod-box recognition and flavonoid-dependent transcription activation, but its role in H. seropedicae and related organisms seems to have evolved to control flavonoid metabolism.

Intervenções para o fenômeno bullying na infância: uma revisão sistemática de literatura / Interventions to bullying phenomenon in childhood: a systematic review of literature

O bullying está associado a consequências negativas para o desenvolvimento infantil. Encontra-se naliteratura estudos recentes propondo intervenções para o manejo do bullying. Este estudo teve comoobjetivo apresentar uma revisão sistemática da literatura de 2002 a 201 2 sobre intervenções para obullying na infância, que resultou em 1 9 artigos científicos. Dois juízes analisaram o objetivo, aabordagem teórica, a temática e os aspectos metodológicos das intervenções. A maioria objetivou adiminuição dos índices de bullying, ocorreu na escola, em grupo, envolvendo toda a escola. Constatou-sediversidade de instrumentos de avaliação, e dificuldades em identificar modelos teóricos dasintervenções, além de nenhum estudo realizado com crianças pré-escolares. São sugeridas possibilidadesde pesquisas futuras acerca de intervenções para o bullying(AU)

Traducción transcultural al español de la clasificación neuromuscular NM-Score sobre funcionalidad motora gruesa, en pacientes con patología neuromuscular / Spanish crosscultural translation of the neuromuscularclassification NM-Score of gross motor function in patientswith neuromuscular diseases

Introduction: Cultural adaptation is a process that is applied in early phases of validation. The “Neuromuscular Score” is an instrument that classifies the gross motor function in people with neuromuscular diseases. It was created in France and has not yet been validated in Chile. Objectives: To carry out the cross cultural adaptation of the “NM Score” from the original version in French to Spanish according to the International standard of translation methodology. Patients and Method: The cross cultural adaptation is a descriptive and transversal study. This study is based on the FACIT methodologic process proposed by Eremenco. Seven health professionals, who achieved inclusion requirements, participated in the translation process. The reliability of the transcultural adaptation was determined with the final version. 30 patients from 6 to 26 years old, with neuromuscular pathology, were interviewed the Teletón Santiago Institute. Results: The methodologic process of translation and adaptation suggests that the translated version does not present great semantic differences. This process has a high global reliability measurements with Cronbach alpha coefficient = 0.93. Conclusion: The translation and adaptation process for NM Score obtained a reliable score and equivalence during its application, giving a representation of the functional compromise.

Introducción: La traducción y adaptación cultural de instrumentos de medición es un proceso que se aplica en las fases iniciales dentro de las etapas de validación de ellos. La Clasificación Puntaje Neuromuscular (NM-Score), es un instrumento que clasifica la severidad de la función motora gruesa en personas con patologías neuromusculares, creada en Francia y no validada en Chile. Objetivos: Realizar la adaptación transcultural de la clasificación NM-Score, desde la versión original en francés al español, según estándares internacionales de metodología de traducción y determinar su confiabilidad. Pacientes y Método: Estudio descriptivo, transversal, basado en metodología de traducción FACIT y medición de confiabilidad propuesto por Eremenco. Siete profesionales de la salud que cumplieron requisitos de inclusión participaron del proceso de traducción. La confiabilidad de la adaptación transcultural se determinó con la versión final de la Clasificación NM Score, que puede ser aplicada a pacientes y padres. Se entrevistaron a 30 usuarios, de 6 a 26 años, con diagnóstico de patología neuromuscular del Instituto Teletón Santiago. Resultados: El proceso metodológico de traducción y adaptación sugiere que la versión traducida no presenta grandes diferencias semánticas y tiene una alta confiabilidad global medido con α de Cronbach = 0,93. Conclusión: El proceso de traducción y adaptación de la Clasificación NM Score obtuvo una versión fiable y de equivalencia al momento de aplicarla a usuarios y padres, dando una representación del compromiso funcional.

Short Communication Microsatellite loci in the tetraploid spined loach, Cobitis biwae, and cross-species amplification in four related species.

Fifteen microsatellite loci were identified in the tetraploid spined loach, Cobitis biwae (Teleostei: Cobitidae). Among these, 14 were polymorphic (5-31 alleles) and showed moderate to high cross-species amplification transferability in four related species, Cobitis matsubarai, Cobitis taenia, Misgurnus anguillicaudatus, and Misgurnus fossilis. The loci, described herein, will be useful for population genetics, phylogeny, parentage analysis, and detection of hybridization among Cobitis species.

Small but not isolated: a population genetic survey of the tropical tree Cariniana estrellensis (Lecythidaceae) in a highly fragmented habitat.

Here, we explore the mating pattern and genetic structure of a tropical tree species, Cariniana estrellensis, in a small population in which progeny arrays (n=399), all adults (n=28) and all seedlings (n=39) were genotyped at nine highly informative microsatellite loci. From progeny arrays we were able to identify the source tree for at least 78% of pollination events. The gene immigration rates, mainly attributable to pollen, were high, varying from 23.5 to 53%. Although gene dispersal over long distance was observed, the effective gene dispersal distances within the small population were relatively short, with mean pollination distances varying from 69.9 to 146.9 m, and seed dispersal distances occurring up to a mean of 119.6 m. Mating system analyses showed that C. estrellensis is an allogamous species (tm=0.999), with both biparental inbreeding (tm-ts=-0.016) and selfing rates (s=0.001) that are not significantly different from zero. Even though the population is small, the presence of private alleles in both seedlings and progeny arrays and the elevated rates of gene immigration indicate that the C. estrellensis population is not genetically isolated. However, genetic diversity expressed by allelic richness was significantly lower in postfragmentation life stages. Although there was a loss of genetic diversity, indicating susceptibility of C. estrellensis to habitat fragmentation, no evidence of inbreeding or spatial genetic structure was observed across generations. Overall, C. estrellensis showed some resilience to negative genetic effects of habitat fragmentation, but conservation strategies are needed to preserve the remaining genetic diversity of this population.

Aldehyde dehydrogenase isoform 1 (ALDH1) expression as a predictor of radiosensitivity in laryngeal cancer.

BACKGROUND: Aldehyde dehydrogenase isoform 1 (ALDH1) has been shown to be a marker of cancer stem cells (CSCs). These stem cells may be responsible for tumour perpetuation as well as local and distant invasion. Several studies have shown that CSCs are more chemoradiotherapy (CRT)-resistant and may be responsible for tumour recurrence. Other studies, in contrast, have found ALDH1 expression to be indicative of a better prognosis. METHODS: We retrospectively evaluated 84 patients diagnosed and treated for laryngeal cancer between 2006 and 2011. All patients underwent curative-intent radiotherapy or CRT at our institution. 57 of the 84 tumour samples contained sufficient material for ALDH1 assessment. RESULTS: ALDH1 expression was detected in 17.5 % (10/57) of the tissue samples. None of the tumours from stage I patients tested positive for ALDH1. The relapse rate in ALDH1 + patients was 10 versus 51.2 % for ALDH1-. No differences in overall survival were observed between the groups; however, disease-free survival was 90 % for the ALDH1 + group versus 48.9 % for ALDH1- patients (p = 0.034). CONCLUSION: The patients in this study with ALDH1 + tumours had better outcomes than their counterparts with ALDH1- tumours. This finding suggests that not all CSCs are resistant to conventional cancer treatments. It may also imply that new methods of correctly identifying these cells are needed.

Morphoscopic Trait Expression in "Hispanic" Populations.

This study evaluates population variation of eight cranial morphoscopic traits using samples of known southwest Hispanics (n=72), Guatemalans (n=106), American Blacks (n=146), and American Whites (n=218). We applied the support vector machine (SVM) method to build a prediction model based on a subsample (20%) of the data; the remainder of the data was used as a test sample. The SVM approach effectively differentiated between the four groups with correct classification rates between 72% (Guatemalan group) and 94% (American Black group). However, when the Guatemalan and southwest Hispanic samples were pooled, the same model correctly classified all groups with a higher degree of accuracy (American Black=96%; American White=77%; and the pooled Hispanic sample=91%). This study also identified significant differences between the two Hispanic groups in six of the eight traits using univariate statistical tests. These results speak to the unique population histories of these samples and the current use of the term "Hispanic" within forensic anthropology. Finally, we argue that the SVM can be used as a classification model for ancestry estimation in a forensic context and as a diagnostic tool may broaden the application of morphoscopic trait data for the assessment of ancestry.

Fragmentation effects and genetic diversity of the key semidecidual forest species Metrodorea nigra in Southwestern Brazil.

Studies of genetic diversity in plant species present in the remaining fragments of the Atlantic Forest are very important for understanding their resilience to such a degraded ecosystem. We analyzed the genetic diversity of 3 populations of the high-density understory species Metrodorea nigra St. Hill. (Rutaceae) located in forest remnants in the region of Ribeirão Preto, SP, Brazil (M13-Rib, BSQ-Rib, and FAC-Crav), by using simple sequence repeat (SSR) and inter-simple sequence repeat (ISSR) molecular markers for conservation purposes. A total of 133 polymorphic loci were observed in 136 inter-simple sequence repeat loci (average of 17 per primer). The Nei genetic diversity (HE) was relatively high considering all populations (0.31). The BSQ-Rib population exhibited the highest value (0.27), followed by the M13-Rib (0.26) and FAC-Crav (0.24) populations. The simple sequence repeat markers analyzed showed a high number of alleles (K = 104), with an average of 14.85 alleles per locus. The average observed heterozygosity was 0.516 and the average expected heterozygosity was 0.771, ranging from 0.688 (FAC-Crav) to 0.765 (BSQ-Rib). The fixation indexes showed positive and significant differences from zero for all sample sets, indicating inbreeding, which may have resulted from the species' mating patterns and the barochoric seed dispersal system of M. nigra. Both markers indicated differentiation among populations, with higher values observed for inter-simple sequence repeat markers. No significant differences between juvenile and adult generations in any of the fragments were observed, indicating the resilience of M. nigra to the effects of fragmentation and reduced habitat.

Genetic diversity of the Neotropical tree Hancornia speciosa Gomes in natural populations in Northeastern Brazil.

Mangabeira (Hancornia speciosa Gomes) is a fruit tree of the Apocynaceae family, which is native to Brazil and is a very important food resource for human populations in its areas of occurrence. Mangabeira fruit is collected as an extractive activity, and no domesticated varieties or breeding programs exist. Due to a reduction in the area of ecosystems where it occurs, mangabeira is threatened by genetic erosion in Brazil. The objective of this study was to characterize and evaluate the genetic diversity of 38 mangabeira individuals collected from natural populations in Pernambuco State using inter-simple sequence repeat (ISSR) molecular markers. The ISSR methodology generated a total of 93 loci; 10 were monomorphic and 83 were polymorphic. The average number of loci per primer was 15.5, ranging from 9 (#UBC 866) to 21 (#UBC 834). The results showed a high level of genetic diversity (0.30), and found that only around 30% of genetic variability is distributed among populations (GST = 0.29, ФST = 0.30), with the remainder (ФCT = 70%) found within each population, as expected for forest outcrossing species. Estimates for historic gene flow (1.18) indicate that there is some isolation of these populations, and some degree of genetic differentiation.

Prevalencia de ventilación mecánica en pacientes pediátricos con sepsis internados en Cuidados Intensivos / Prevalence of ventilation Mechanics in patients pediatric patients with sepsis interned in Intensive Care

Objetivo: Describir las características sociodemográficas y clínicas de niños con sepsis y ventilación mecánica. Métodos: Estudio observacional, transversal, multicéntrico, de un año de duración, en 19 Unidades de Cuidados Intensivos Pediátricos. Los datos se recolectaron a través de la página www.sepsisencolombia.com. Los pacientes fueron clasificados por diagnósticos, según tuvieran criterios de sepsis, sepsis grave, choque séptico y falla orgánica múltiple, y la necesidad o no de ventilación mecánica. Resultados: Se incluyeron 1051 pacientes con sepsis y el 67,7% de ellos requirió ventilación mecánica. El 43,1% eran niñas, la mediana de la edad era de 12 meses (rango intercuartílico 1-59). La mediana de estancia en la Unidad de Cuidados Intensivos Pediátricos de los pacientes ventilados fue de 8 días (rango intercuartílico 5-15) y de 4 días (rango intercuartílico 3-6) de los no ventilados. En el 97,1%, se conoció el origen de la sepsis, el más frecuente fue el aparato respiratorio. Se encontró relación entre tener sepsis y no requerir ventilación mecánica (rango intercuartílico 0,279-0,439) (p = 0,0000) y de requerirla, si había choque séptico (rango intercuartílico 0,694-0,781) (p = 0,0000). Los pacientes que requirieron ventilación mecánica tuvieron más probabilidad de morir (odds ratio 30,0; rango intercuartílico 11,5-78,6). Conclusiones: La sepsis y desarrollar choque séptico hacen más probable la necesidad de ventilación mecánica y hay una asociación entre ésta y mayor probabilidad de muerte.(AU)

Objective: To describe the sociodemographic and clinical characteristics of children with sepsis and mechanical ventilation. Methods: Observational, cross-sectional, multicenter study in 19 pediatric intensive care units. Data were collected through the website www. sepsisencolombia.com. Patients were classified by diagnosis, according to the following criteria: sepsis, severe sepsis, septic shock and multiple organ failure, with or without mechanical ventilation. Results: 1051 patients with sepsis were included and 67.7% of them required mechanical ventilation. 43.1% were female, median age: 12 months (interquartile range 1-59). The median stay in the PICU of ventilated patients was 8 days (interquartile range 5-15) and 4 days (interquartile range 3-6) of those without ventilation. The origin of sepsis was known in 97.1%, the most frequent source was the respiratory system. Relationship was found between having sepsis and not requiring mechanical ventilation (interquartile range 0.279 to 0.439) (p = 0.0000) and requiring it was found, if there was septic shock (interquartile range 0.694 to 0.781) (p = 0.0000). Patients who required mechanical ventilation were more likely to die (odds ratio 30.0; interquartile range 11.5 to 78.6. Conclusions: Sepsis and the development of septic shock make it more likely to need mechanical ventilation and there is an association between this and increased probability of death.(AU)

Beyond Anderson localization in 1D: anomalous localization of microwaves in random waveguides.

Experimental evidence demonstrating that anomalous localization of waves can be induced in a controllable manner is reported. A microwave waveguide with dielectric slabs randomly placed is used to confirm the presence of anomalous localization. If the random spacing between slabs follows a distribution with a power-law tail (Lévy-type distribution), unconventional properties in the microwave-transmission fluctuations take place revealing the presence of anomalous localization. We study both theoretically and experimentally the complete distribution of the transmission through random waveguides characterized by α=1/2 ("Lévy waveguides") and α=3/4, α being the exponent of the power-law tail of the Lévy-type distribution. As we show, the transmission distributions are determined by only two parameters, both of them experimentally accessible. Effects of anomalous localization on the transmission are compared with those from the standard Anderson localization.

Linfoma tiroideo en paciente con tiroiditis de Hashimoto / Thyroid lymphoma in patient with Hashimoto´s thyroiditis

INTRODUCCIÓN: El linfoma tiroideo (LT) es una neoplasia infrecuente(menos del 1 por ciento de linfomas y menos del 2 por ciento de neoplasias tiroideas). Su incidencia es mayoritaria en mujeres, entre 60 y 75 años. La tiroiditis de Hashimoto es un importante factor de riesgo. El objetivo es destacar la importancia del estudio precoz del bocio rápidamente progresivo. PRESENTACIÓN DEL CASO: Hombre de 63 años, con antecedentes de hipertensión arterial, tabaquismo crónico activo e hipotiroidismo por tiroiditis de Hashimoto sin tratamiento, consultó por aumento de volumen cervical anterior progresivo, asociado a disfonía, disfagia y disnea, de tres meses de evolución. Ecografía cervical evidenció bocio multinodular difuso de predominio izquierdo. Se decidió intentar tiroidectomía total, constatándose gran tumor duro, extendido a nivel infraparatiroideo, con adherencia marcada a laringe, tráquea, vasos y tejido muscular, que no se pudo extirpar completamente. Biopsia compatible con Linfoma no Hodgkin difuso de células grandes B, tipo centro germinal. Se decidió traslado a centro de referencia para manejo por especialista. DISCUSIÓN: El LT se presenta clínicamente de forma similar a otras neoplasias tiroideas con bocio rápidamente progresivo y sintomatología compresiva. Es importante considerar su asociación con tiroiditis de Hashimoto, pese a que es improbable que ésta evolucione a linfoma (0,1 por ciento), se encuentra en la mayoría de los casos de LT (80 a 90 por ciento); ambas patologías son infrecuentes en hombres.

INTRODUCTION: Thyroid lymphoma (LT) is a rare neoplasm; it represents less than 1 percent of lymphomas and less than 2 percent of thyroid neoplasms. It occurs mainly in women between 60 and 75 years. Hashimoto's thyroiditis is an important risk factor. The aim is to illustrate the importance of early study of rapidly enlarging goiter. CASE REPORT: A 63-year-old male with a history of arterial hypertension, chronic active smoking and untreated hypothyroidism secondary to Hashimoto's thyroiditis, consulted by progressive cervical volume increase, associated with dysphonia, dysphagia and dyspnea, with three months of duration. Cervical ultrasound showed diffuse multinodular goiter with left predominance. It was decided to try a total thyroidectomy, which confirmed a large and indurated tumor, spread to infra-parathyroid level, with strong adherence to larynx, trachea, blood vessels and muscle tissue, which could not be completely removed. Biopsy was compatible with diffuse large B-cell lymphoma, germinal center type. It was decided to transfer the patient to a referral center for handling by a specialist. DISCUSSION: Thyroid Lymphoma presents clinical similarities to other thyroid malignancies with rapidly enlarging goiter and compression symptoms such as dysphagia, dyspnea, stridor, dysphonia, headache, facial and upper extremities edema; in case of suspicion a biopsy is required. The association with Hashimoto's thyroiditis is very important, although it is unlikely to evolve lymphoma (0.1 percent), is present in most cases of LT (80 to 90 percent). Both conditions are rare in men. Surgical treatment is usually associated with chemotherapy with or without local radiotherapy.

[Gallstone ileus, an uncommon cause of bowel obstruction]. / Íleo biliar, causa poco frecuente de obstrucción intestinal.

Gallstone ileus is a rare complication of cholelithiasis. It is characterized by bowel obstruction secondary to gallstone impaction at some point of the gastrointestinal tract due to the existence of a bilioenteric fistula. The aim of this analysis was to evaluate our experience through a retrospective study, covering a 12-year period. It included 14 cases (10 women and 4 men) with a median age of 81 years; 11 of the patients had comorbidities. The main analytic alteration was an increase in urea (median 79mg/dl). Diagnosis was confirmed through abdominal computed tomography in 10 cases and plain abdominal x-ray in 4. The stone was located in the jejunum in 6 cases, the ileum in 6, and the sigmoid colon in one; the mean stone size was 3cm. There were 11 cases of cholecystoduodenal fistula, one case of cholecystocolonic fistula, and one idiopathic fistula. Two patients died, including the patient that did not undergo surgery.

Genetic diversity and mating system of Copaifera langsdorffii (Leguminosae/Caesalpinioideae).

Copaifera langsdorffii, locally known as copaíba, is a valuable tropical tree with medicinal properties of its oil. We studied the genetic variation, genetic structure, and the mating system of trees in stands of C. langsdorffii (Leguminosae/Caesalpinioideae) located in an extensive area between the Pardo and Mogi-Guaçu basins in São Paulo State, Brazil, and their offspring, conserved in an ex situ germplasm bank at the University of São Paulo in Ribeirão Preto, SP, Brazil, using six microsatellite loci. Leaves were collected from 80 seed trees and from 259 offspring and their DNA extracted. A total of 140 and 175 alleles were found in the seed trees and their offspring, respectively. Low genetic differentiation was observed between stands, indicating intense gene flow due to efficient pollen dispersion vectors. An estimation of the outcrossing rate showed that these stands are outcrossed (tm = 0.98, P > 0.05). The mean variance of the effective population size of each family in two of the stands was 3.69 and 3.43, while the total effective population size retained in the germplasm bank was between 81 and 96. The paternity correlation was low, ranging from 0.052 to 0.148, demonstrating that the families implanted in this germplasm bank are composed predominantly of half-sibs.