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Resumen El carcinoma escamoso (CEC) es un tumor maligno de la epidermis y sus anexos. Es el segundo en frecuencia después del carcinoma basocelular y presenta distintas variantes clinicopatológicas. El subtipo carcinoma verrucoso (CV) es una variante poco frecuente de CEC con características histopatológicas y comportamiento específico. Ocasionalmente, se pueden observar componentes carcinomatosos de células escamosas convencionales en el CV, denominándose a esta entidad tumores "híbridos", los cuales representan el 20% de los casos observados. Reportamos el caso de un paciente varón de 72 años con una gran lesión exofítica que compromete 5to dedo y planta de pie derecho con diagnóstico de carcinoma escamoso híbrido. El objetivo de la presentación es mostrar una asociación infrecuente, haciendo énfasis en su seguimiento cercano ya que puede manifestar cambios en su comportamiento clínico diseminándose a los ganglios linfáticos regionales.

Abstract Squamous carcinoma (SCC) is a malignant tumor of the epidermis and its appendages. It is the second most common after basal cell carcinoma and has different clinicopathological variants. The verrucous carcinoma (VC) subtype is a rare variant of SCC with histopathological characteristics and specific behavior. Occasionally, carcinomatous components of conventional squamous cells can be observed in the VC, this entity being called "hybridized" tumors, which represent 20% of cases.We report the case of a 72-year-old male with a large exophytic lesion involving the 5th right toe and foot with a diagnosis of squamous hybrid carcinoma. The objective of the presentation is to show an infrequent association, emphasizing its close follow-up as it can modify its clinical behavior by spreading to regional lymphnodes.

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Objetivo: Evaluar la factibilidad del empleo de la minigammacámara portátil Sentinella(R), para el diagnóstico de muerte encefálica (ME). Diseño: Estudio observacional, prospectivo, de factibilidad. Ámbito: Unidad de cuidados intensivos de un hospital de tercer nivel. Pacientes: Desde enero a diciembre de 2017 se registraron de forma consecutiva los pacientes mayores de edad que tras su ingreso en unidad de cuidados intensivos fueron diagnosticados de ME según criterios clínicos. Intervenciones: El procedimiento se realizó a la cabecera del paciente tras la administración intravenosa de tecnecio 99 metaestable-hexametil-propilen-amino-oxima. La ausencia de perfusión a nivel de hemisferios cerebrales y fosa posterior se describía como patrón compatible con ME. Se correlacionó el diagnóstico con doppler transcraneal y/o electroencefalograma. Resultados: Cincuenta y seis pacientes presentaron exploración física compatible con ME. Un 66,1% fueron hombres con una mediana de edad de 60 (RIQ: 51-72) años. La causa más frecuente que precipitó la ME fue el ictus hemorrágico en el 48,2% (27) seguido por traumatismo craneoencefálico grave en el 30,4% (17), ictus isquémico en el 10,7% (6) y encefalopatía anóxica tras parada cardiorrespiratoria en el 7,1% (4). En todos los casos se realizó el diagnóstico clínico de ME y posteriormente una gammagrafía portátil que confirmó dicho diagnóstico en el 100% de los pacientes. Se contrastó el resultado con doppler transcraneal en 46 de ellos que confirmaba la presencia de reverberación diastólica y/o picos sistólicos. En 10 casos se registró el electroencefalograma, con aparición de silencio eléctrico, debido a la ausencia de ventana acústica en el doppler transcraneal. Conclusiones: El uso de minigammacámara portátil puede resultar una herramienta útil y factible para el diagnóstico de ME

Objective: To evaluate the feasibility of using the Sentinella(R) portable gamma-camera for the diagnosis of brain death (BD). Design: A prospective, observational feasibility study was carried out. Setting: Intensive Care Unit of a third level hospital. Patients: Consecutive recording was made of the adults diagnosed with brain death based on clinical criteria following admission to the Intensive Care Unit in the period from January to December 2017. Interventions: The procedure was performed at the patient bedside with the intravenous administration of technetium 99 metastable hexamethylpropylene amine oxime. The absence of perfusion in the cerebral hemispheres and brainstem was described as a pattern consistent with BD. The diagnosis was correlated to the transcranial Doppler and / or electroencephalographic findings. Results: A total of 66.1% of the patients were men with an average age of 60 years [IQR: 51-72]. The most frequent causes resulting in BD were hemorrhagic stroke (48.2%, n=27), followed by traumatic brain injury (30.4%, n=17), ischemic stroke (10.7%, n=6) and post-cardiac arrest anoxic encephalopathy (7.1%, n=4). A clinical diagnosis of BD was made in all cases, and the portable gamma-camera confirmed the diagnosis in 100% of the patients with a pattern characterized by the absence of brain perfusion. In addition, the results were compared with the transcranial Doppler findings in 46 patients, confirming the presence of diastolic reverberation and / or systolic peaks. The electroencephalographic tracing was obtained in 10 cases, with the appearance of electrical silence, due to the absence of an acoustic window in the transcranial Doppler study. Conclusions: A portable gamma-camera could be a useful and feasible tool for the diagnosis of BD

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Assessing the cheese-making properties (CMP) of milks with a rapid and cost-effective method is of particular interest for the Protected Designation of Origin cheese sector. The aims of this study were to evaluate the potential of mid-infrared (MIR) spectra to estimate coagulation and acidification properties, as well as curd yield (CY) traits of Montbéliarde cow milk. Samples from 250 cows were collected in 216 commercial herds in Franche-Comté with the objectives to maximize the genetic diversity as well as the variation in milk composition. All coagulation and CY traits showed high variability (10 to 43%). Reference analyses performed for soft (SC) and pressed cooked (PCC) cheese technology were matched with MIR spectra. Prediction models were built on 446 informative wavelengths not tainted by the water absorbance, using different approaches such as partial least squares (PLS), uninformative variable elimination PLS, random forest PLS, Bayes A, Bayes B, Bayes C, and Bayes RR. We assessed equation performances for a set of 20 CMP traits (coagulation: 5 for SC and 4 for PCC; acidification: 5 for SC and 3 for PCC; laboratory CY: 3) by comparing prediction accuracies based on cross-validation. Overall, variable selection before PLS did not significantly improve the performances of the PLS regression, the prediction differences between Bayesian methods were negligible, and PLS models always outperformed Bayesian models. This was likely a result of the prior use of informative wavelengths of the MIR spectra. The best accuracies were obtained for curd yields expressed in dry matter (CYDM) or fresh (CYFRESH) and for coagulation traits (curd firmness for PCC and SC) using the PLS regression. Prediction models of other CMP traits were moderately to poorly accurate. Whatever the prediction methodology, the best results were always obtained for CY traits, probably because these traits are closely related to milk composition. The CYDM predictions showed coefficient of determination (R2) values up to 0.92 and 0.87, and RSy,x values of 3 and 4% for PLS and Bayes regressions, respectively. Finally, we divided the data set into calibration (2/3) and validation (1/3) sets and developed prediction models in external validation using PLS regression only. In conclusion, we confirmed, in the validation set, an excellent prediction for CYDM [R2 = 0.91, ratio of performance to deviation (RPD) = 3.39] and a very good prediction for CYFRESH (R2 = 0.84, RPD = 2.49), adequate for analytical purposes. We also obtained good results for both PCC and SC curd firmness traits (R2 ≥ 0.70, RPD ≥1.8), which enable quantitative prediction.

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INTRODUCCIÓN: La teledermatología (TD) es la especialidad clínica más desarrollada de la telemedicina. El desarrollo de la TD en un país completo no se ha estudiado previamente en profundidad. MÉTODOS: El objetivo fue analizar los modelos de TD en práctica real en España, centrándose en la organización, los aspectos técnicos, la docencia y las ventajas/desventajas percibidas por los teledermatólogos. Se realizaron 2 encuestas con teledermatólogos en 2009 y 2014. RESULTADOS: Se identificaron 25 centros utilizando TD en 2009 y 70 en 2014. La encuesta ampliada fue completada por 21 centros en 2009 y 42 en 2014. Las características generales en 2014 fueron: TD almacenamiento (TDA) fue la técnica predominante (83%), solo el 12% TD en tiempo real y el 5% TD híbrida. El 75% de los pacientes vistos en TD viven a menos de 25 km (TD urbana). La mayoría de los centros utilizan cámaras bridge de gama media y solo el 12% utiliza los teléfonos móviles. El 15% practica teledermoscopia y el 15% TD terciaria. En el 25%, la TD se restringió a la oncología cutánea; el 66% utiliza la TD para formación de médicos de primaria. Las ventajas principales (puntuación 0-10) fueron priorización en oncología (8,3), asistencia rápida de urgencias (7,8), la formación y la comunicación con los médicos de primaria (7,6), el cribado de enfermedad banal (7,6) y la disminución de las visitas presenciales (7,6). Los principales inconvenientes fueron (puntuación 0-10): la baja calidad de imágenes (6,3), el miedo al error (5,7), difícil coordinación con los médicos de primaria (MP) (3,8) y consumo de tiempo (3,3). La evolución 2009-2014 mostró más centros con TD y más teledermatólogos, mejor tecnología y aumento de los modelos TDA y urbano. CONCLUSIÓN: La TD es una tecnología emergente que comienza su fase de consolidación en España. Más del 25% de los centros de dermatología en España han puesto en práctica un sistema de TD. El modelo predominante es TDA en un entorno urbano. Los dermatólogos perciben la TD como una opción efectiva con más ventajas que desventajas. La satisfacción general es alta, sin embargo, todavía hay áreas que necesitan mejoras significativas

INTRODUCTION: Teledermatology is the most advanced clinical specialty in telemedicine. The development of teledermatology in specific countries has not been studied in depth. METHODS: Our objective was to analyze teledermatology models in clinical practice in Spain. We paid special attention to organization, technical aspects, training, and the advantages/disadvantages as seen by teledermatologists. Two surveys were carried out (2009 and 2014). RESULTS: Teledermatology was used at 25 centers in 2009 and at 70 in 2014. The extended survey was completed by 21 centers in 2009 and 41 in 2014. Store-and-forward teledermatology was the main technique (83%) in 2014. Only 12% of centers used the real-time method, and 5% used a hybrid modality. Patients lived less than 25 km away in 75% of cases (urban teledermatology). Most centers used mid-range bridge cameras; only 12% used mobile phones. Teledermoscopy and tertiary teledermatology were each used in 15% of centers. Teledermatology was restricted to skin cancer in 25% of cases, and 66% of centers used it to train primary care physicians. The main advantages, assessed on a scale of 1 to 10, were prioritization in cancer screening (8.3), rapid emergency care (7.8), training of and communication with primary care physicians (7.6), screening for trivial conditions (7.6), and reduction in the number of face-to-face visits (7.6). The main disadvantages were poor image quality (6.3), fear of error (5.7), difficulty in coordinating with primary care physicians (3.8), and time commitment (3.3). Between 2009 and 2014, the number of centers using teledermatology and the number of teledermatologists increased, as did use of the store-and-forward and urban models. The technology used also improved. CONCLUSION: Teledermatology is an emerging technology that is becoming well established in Spain. More than 25% of dermatology centers in Spain have implemented a teledermatology model. Store-and-forward in an urban setting is the most widely used modality. Teledermatologists see this technology as an effective option with more advantages than disadvantages. General satisfaction is high, although there is room for significant improvement in some areas

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RESUMEN El siguiente caso clínico trata de una paciente, gestante tras fecundación in vitro, afecta de endometriosis profunda. Dicha paciente debutó durante el embarazo con un síndrome del seno cavernoso con cefalea e hipoestesia facial, siendo diagnosticada tras una exploración neurológica detallada y las pruebas complementarias pertinentes de un meningioma. Por este motivo, tuvo que ser sometida a una cesárea previa al abordaje terapéutico del tumor, dado el empeoramiento clínico progresivo que se estaba produciendo. Dado que en la literatura científica la asociación entre la endometriosis y la aparición de meningiomas ya ha sido descrita, con este caso clínico intentaremos acercarnos a las posibles causas de dicha asociación, como podría ser el ambiente predominantemente estrogénico de las pacientes con endometriosis. De igual modo, abordaremos el manejo del meningioma tanto dentro como fuera del embarazo, sirviéndonos para ello de la bibliografía disponible.

ABSTRACT A pregnancy woman affected by deep endometriosis is presented in this clinical case. A cavernous sinus syndrome was diagnosed during her pregnancy. She started suffering from headache and facial hypoesthesia. After a detailed neurological examination and the relevant complementary tests the patient was diagnosed of a meningioma. Given the progressive clinical worsening that was taking place, she had to undergo a cesarean section prior to the therapeutic approach of the tumor. Through this clinical case we will try to approach the possible causes of the association between endometriosis and meningioma, such as the predominantly estrogenic environment of patients with endometriosis. Similarly, we will address the management of meningioma both inside and outside of pregnancy, using the related available literature.

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La realización de procedimientos invasivos en pacientes con anticoagulación oral es un riesgo. Sin unos datos concluyentes al respecto, las recomendaciones sobre el manejo, por lo general, son de escasa solidez, y su manejo es controvertido y heterogéneo. Se realiza una revisión de las evidencias sobre el manejo periprocedimiento electivo de la anticoagulación oral después de la publicación de la 9.ª edición de la guía del American College of Chest Physicians. Salvo en caso de procedimientos con riesgo hemorrágico mínimo, los anticoagulantes orales serán suspendidos justo con la antelación necesaria para que se realice sin efecto anticoagulante significativo, lo que dependerá de la vida media del fármaco, que en el caso de los anticoagulantes orales de acción directa está condicionada por la función renal. Estudios recientes muestran que la utilización de terapia puente con heparina en pacientes que interrumpen temporalmente la anticoagulación oral no aporta beneficios e incrementa los sangrados; sin embargo, no hay evidencia concluyente contra su uso en pacientes con alto riesgo tromboembólico (AU)

The performance of invasive procedures in patients undergoing oral anticoagulation represents a risk. Without conclusive data on this issue, the recommendations on managing oral anticoagulation are generally weak, and its management is controversial and heterogeneous. We conducted a review of the evidence on the elective periprocedural management of oral anticoagulation following the publication of the 9th edition of the guidelines of the American College of Chest Physicians. Except for cases of procedures with minimal haemorrhagic risk, the use of oral anticoagulants is suspended with sufficient time so that it can be performed without a significant anticoagulant effect, which will depend on the half-life of the drug. For direct oral anticoagulants, the half-life is determined by the renal function. Recent studies have shown that the use of bridge therapy with heparin in patients who temporarily suspended the use of oral anticoagulation provided no benefits and increased the bleeding. However, there is no conclusive evidence against its use in patients with a high thromboembolic risk (AU)

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An important prerequisite for high prediction accuracy in genomic prediction is the availability of a large training population, which allows accurate marker effect estimation. This requirement is not fulfilled in case of regional breeds with a limited number of breeding animals. We assessed the efficiency of the current French routine genomic evaluation procedure in four regional breeds (Abondance, Tarentaise, French Simmental and Vosgienne) as well as the potential benefits when the training populations consisting of males and females of these breeds are merged to form a multibreed training population. Genomic evaluation was 5-11% more accurate than a pedigree-based BLUP in three of the four breeds, while the numerically smallest breed showed a < 1% increase in accuracy. Multibreed genomic evaluation was beneficial for two breeds (Abondance and French Simmental) with maximum gains of 5 and 8% in correlation coefficients between yield deviations and genomic estimated breeding values, when compared to the single-breed genomic evaluation results. Inflation of genomic evaluation of young candidates was also reduced. Our results indicate that genomic selection can be effective in regional breeds as well. Here, we provide empirical evidence proving that genetic distance between breeds is only one of the factors affecting the efficiency of multibreed genomic evaluation.

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Objetivo: Conocer el bienestar emocional de las mujeres recluidas en prisiones de España a través del análisis del estado de salud mental que presentan e indagar sobre los factores que inciden en él. Material y métodos: Se considera una muestra de 434 internas en centros penitenciarios españoles. Se ha utilizado un cuestionario diseñado ad hoc y se ha llevado a cabo un análisis de regresión logística para determinar que variables y en qué medida influyen en el bienestar emocional. Resultados: Se confirma la existencia de una relación estadísticamente significativa entre los estadios de bienestar y las variables origen (región de procedencia de las mujeres) e historial de adicciones a sustancias. No se ha encontrado relación significativa para los niveles de bienestar con otras variables (maternidad, apoyo social o familiar, padecimiento de violencia de género o el tener o no pareja). Conclusiones: Tener un historial de adicciones a sustancias incide negativamente en los niveles de bienestar emocional de las mujeres recluidas en centros penitenciarios. Los bajos índices de consumo de sustancias en las mujeres de origen latinoamericano, se relaciona con sus niveles más positivos de bienestar emocional (AU)

Objective: To know more about the emotional well-being of women held in prisons in Spain by analyzing the state of mental health they present and investigating the factors that affect them. Material and methods: A sample of 434 inmates in Spanish penitentiary centers was studied. An ad hoc designed questionnaire was used and a logistic regression analysis was conducted to determine the variables and to what extent they influence emotional well-being. Results: The existence of a statistically significant relationship between the well-being stages and the origin variables (region of origin of the women) and the history of substance addiction were confirmed. No significant relationship has been found for well-being levels from other variables (maternity, social or family support, gender violence or having or not having a partner). Conclusions: Having a problematic history of drug use negatively affects the levels of emotional well-being of women detained in prisons. The low levels of substance use in women of Latin American origin is related to their more positive levels of emotional well-being (AU)

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Objetivos: Describir la calidad ética y metodológica de los estudios posautorización de tipo observacional con medicamentos de uso humano promovidos por los Servicios de Farmacia Hospitalaria (SFH). Métodos: Se identificaron los estudios promovidos por los SFH registrados en la Agencia Española de Medicamentos y Productos Sanitarios (AEMPS) durante 2009-2011 y/o publicados en la revista Farmacia Hospitalaria en el mismo período. Se analizaron los aspectos éticos y metodológicos más relevantes. Con el fin de conocer las diferencias de los estudios promovidos por los SFH respecto a estudios realizados por otros promotores, se compararon con los estudios registrados durante 2003-2007. Resultados: Se registraron en la AEMPS 22 estudios promovidos por SFH, que comparados con aquellos realizados por promotores diferentes, mostraron un menor cumplimiento de los aspectos éticos recogidos en la normativa, así como resultados más discretos y estadísticamente significativos (p < 0,05), respecto a justificación del tamaño muestral (41,5% vs 80%) o ámbito internacional (0% vs 24%). Respecto a los estudios publicados en la revista Farmacia Hospitalaria (n = 52), ninguno fue registrado en la AEMPS. En comparación con los estudios registrados promovidos por SFH, presentaron menor calidad metodológica, en aspectos tales como presencia de grupo control (3,8% vs 27,3%) (p = 0,0072) o justificación del tamaño muestral (19,2% vs 42,8%) (p < 0,05). Conclusión: Existen aspectos administrativos, metodológicos y éticos de los estudios promovidos por los SFH que deben ser mejorados según la normativa. El registro en la AEMPS, parece tener un efecto positivo en el rigor científico y ético de los protocolos de investigación (AU)

Objectives: To describe the ethical and methodological quality of non-interventional post-authorization studies promoted by Hospital Pharmacy Departments (HPD). Methods: HPD promoted studies in the 2009-2011 period included in the Spanish Agency of Medicines and Medical Devices (AEMPS) registry and/or published in "Farmacia Hospitalaria" were identified. The most relevant ethical and methodological characteristics were analyzed. Studies promoted by HPD were also compared with studies not promoted by HPD. Results: Twenty two studies promoted by HPD, and registered in the AEMPS were identified. Within the registered studies HPD promoted studies had lower sample size estimation (41,5% vs 80%) and international scope (0% vs 24%) compared to non HPD promoted studies with significant differences (p < 0,05). None of the published studies in the journal Farmacia Hospitalaria have been registered in the AEMPS and had lower methodological quality than the registered studies promoted by HPD in characteristics such as presence of control group (3,8% vs 27,3%) (p = 0,0072) and the sample size estimation of (19,2% vs 42,8%) (p < 0,05). Conclusion: The management and the methodological and ethical characteristics of the studies promoted by HPD should be improved according to the regulation. The registration in the AEMPS might have a positive impact on the quality of these research protocols (AU)

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Este artículo describe los procedimientos administrativos y requerimientos legales para llevar a cabo estudios observacionales con medicamentos de uso humano en España (AU)

This article describes the administrative and legal requirements to carry out non-interventional post-authorization studies in Spain (AU)

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Objetivo: Valorar la utilidad de un control gravimétrico rutinario como control de calidad tras la elaboración de nutriciones parenterales (NP) con un error gravimétrico inferior al ± 5%. Material y métodos: Estudio prospectivo, en el que durante 2 meses se pesaron diariamente de 5 a 8 NP de gran volumen y durante 4 meses todas las NP de pequeño volumen, considerándose este valor el peso real. El peso teórico se calculó teniendo en cuenta las densidades, los volúmenes de todos los productos utilizados en la elaboración y el peso de las bolsas multicapas utilizadas. El error gravimétrico se calculó en porcentaje con respecto al peso teórico. Resultados: Se pesaron 168 NP de gran volumen y 42 de pequeño volumen, las medias de los errores gravimétricos fueron 1,42% (SD = 1,31) y 1,26% (SD = 0,64), con un error gravimétrico inferior al 5% en el 98,8% y 100% respectivamente. Conclusión: Establecer un control gravimétrico rutinario es una estrategia útil que puede ayudar a garantizar la calidad de la elaboración de NP (AU)

Objective: To assess the usefulness of establishing a routine gravimetric as quality assurance after the development of parenteral nutrition (PN) with a gravimetric error less than ± 5%. Material and methods: Prospective study in which 5 to 8 large volume PN were weighed daily during 2 months and for 4 months all small volume PN, considering this the real weight. The theoretical weight was calculated taking into account the densities, volumes of all products used in processing and the weight of the bags used. The gravimetric error was calculated as a percentage compared to the theoretical weight. Results: 168 large volume PN and 42 small volume were weighed, gravimetric errors measures were 1,42% (SD = 1,31) and 1,26% (SD = 0,64), with a gravimetric error less than 5% in 98,8% and 100% respectively. Conclusion: Establishing a routine gravimetric control is an useful strategy that can help to guarantee the quality of the PN development (AU)

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El síndrome de Löfgren se define por la presencia de eritema nodoso, adenopatías hiliares, afectación articular y fiebre. Se considera una variante de sarcoidosis aguda que evoluciona hacia la curación espontánea y sin secuelas en el 95% de los casos. Presentamos el caso de un paciente con sarcoidosis aguda que debutó con un síndrome de Löfgren clásico, destacando la presencia de eritema nodoso, menos frecuente en varones, y la existencia de nódulos en extremidades superiores, así como su recurrencia durante el tratamiento con antiinflamatorios no esteroideos (AU)

Löfgren's syndrome is defined by the presence of erythema nodosum, hilar adenopathy, migratory polyarthralgias and fever. It is considered as a manifestation of acute sarcoidosis with good prognosis and spontaneous remission in 95% of cases. We present the case of a man with acute sarcoidosis who began with a classical Löfgren's syndrome. Standing out was the presence of nodosum erythema, this being less frequent in men, and the existence of nodules on the upper limbs that recurred while he was being treated with nonsteroidal anti-inflammatory drugs (AU)

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The aim of this work was to estimate whether genetic dissection of QTL on chromosomes 1, 2, 4, and 7, detected in an F2 Meishan x Large White population, can be achieved with a recombinant back-cross progeny test approach. For this purpose, a first generation of backcross (BC1) was produced by using frozen semen of F1 Large White x Meishan boars with Large White females. Four BC1 boars were selected because of their heterozygosity for at least 1 of the 4 regions. The BC1 boars were crossed with Large White sows, and the resulting BC2 offspring were measured for several growth and body composition traits. Contrary to the F2 animals, BC2 animals were also measured for meat quality traits in adductor, gluteus superficialis (GS), longissimus dorsi, and biceps femoris (BF) muscles. Each BC1 boar was tested for a total of 39 traits and for the 4 regions with statistical interval mapping analyses. The QTL effects obtained in BC1 families showed some differences compared with those described in F1 families. However, we confirmed QTL effects for growth in the SW1301-SW2512 markers interval on chromosome 1 and also for body composition in the SW1828-SW2512 markers interval on chromosome 1, in the SW2443-SWR783 markers interval on chromosome 2, and in the SW1369-SW632 markers interval on chromosome 7. In addition, we detected new QTL for growth traits on chromosome 2 and for meat quality traits on chromosomes 1 and 2. Growth of animals from weaning to the end of the test was influenced by the IGF2 gene region on chromosome 2. Concerning meat quality, ultimate pH of adductor, longissimus dorsi, and BF were affected by the interval delimited by UMNP3000 and SW2512 markers on chromosome 1, and a* of GS, L* of BF, and water-holding capacity of GS were affected by QTL located between marker loci SW2443 and SWR783 on chromosome 2. Recombinant progeny testing appeared to be a suitable strategy for the genetic dissection of the QTL investigated.

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The levels of stress hormones, cortisol and catecholamines (adrenaline and noradrenaline), were measured in urine collected after slaughter from the bladder, in 309 pigs (females and castrated males) from an F2 intercross between the Large White and Duroc breeds to analyze the relationships between stress-responsive neuroendocrine systems, carcass composition and meat quality. Intramuscular fat content was measured from a biopsy sample taken at a live weight of 70 kg from the longissimus lumborum muscle, and carcass and meat quality traits were also collected. Carcass fat content was higher and estimated carcass lean meat content was lower with increasing urinary levels of cortisol and adrenaline (that are highly correlated with each other), but was not related to the levels of noradrenaline, showing that adrenal hormones favor the accretion of fat at the expense of muscle proteins, a typical physiological effect of cortisol. On the contrary, intramuscular fat levels were unrelated to either hormone level. Finally, muscle pH measured 24 h after death was positively correlated with catecholamine levels, an effect related to the catabolism of muscle glycogen by catecholamines released by preslaughter stress, which impairs post-mortem acidification of meat. These results show the importance of a control over stress neuroendocrine systems to increase pork production and product quality, and the value of the genetic approach to reach this goal.