Electro-optics of confined systems.

Confinement in microenvironments occurs in many natural systems and technological applications. However, little is known about the behaviour of the immersed nanoparticles. In this work we show that their diffusion, electro-orientation and electric field induced polarization can be determined through electric birefringence experiments. We analyze aqueous dispersions of silver nanowires and clay particles confined inside microdroplets. We have observed that confinement reduces the amount of particles that can be oriented by the external electric field. However, the polarizability of the oriented particles is not affected by the presence of the oil/water boundary, and it is the same as in unbounded media, which agrees with the fact that the electric polarization and related phenomena are short-ranged.

Electro-optical Study of the Anomalous Rotational Diffusion in Polymer Solutions.

Brownian diffusion of spherical nanoparticles is usually exploited to ascertain the rheological properties of complex media. However, the behavior of the tracer particles is affected by a number of phenomena linked to the interplay between the dynamics of the particles and polymer coils. For this reason, the characteristic lengths of the dispersed entities, depletion phenomena, and the presence of sticking conditions have been observed to affect the translational diffusion of the probes. On the other hand, the retardation effect of the host fluid on the rotational diffusion of nonspherical particles is less understood. We explore the possibility of studying this phenomenon by analyzing the electro-orientation of the particles in different scenarios in which we vary the ratio between the particle and polymer characteristic size, and the geometry of the particles, including both elongated and oblate shapes. We find that the Stokes-Einstein relation only applies if the radius of gyration of the polymer is much shorter than the particle size and when some repulsive interaction between both is present.

Electro-orientation of Ag nanowires in viscoelastic fluids.

In this work we study the electro-orientation (through electric birefringence experiments) of silver nanowires in polymer solutions eventually capable of forming gel networks. Information on the structure of the polymer solution is obtained by evaluating the electro-orientation of the nanowires. It is found that in presence of poly(ethylene oxide), Kerr's law (birefringence proportional to the square of the field) is fulfilled, and the randomization process after switching off the external field is purely diffusive, controlled by the viscosity of the Newtonian polymer solution. In the case of (gelating) sodium alginate solutions, measuring at larger distances from the bottom (where the source of cross-linking Ca2+ ions is deposited) means a smaller degree of cross-linking, and a less stiff gel. In fact, it is found that after a certain time the birefringence signal gets frozen at the bottom, indicating that a gel network is formed which hinders particle orientation. The viscosity deduced up to that point agrees well with rheological determinations, with increasing deviations found at longer times due to the inhomogeneous gel formation. This process has an interesting consequence on birefringence response: Kerr's law fails to be fulfilled, appearing a "yield" applied electric field, larger the longer the time after preparation.

[Relevance of clinical and serum parameters on severe urinary sepsis after renal obstruction.] / Importancia de los parámetros clínicos y analíticos de la sepsis grave en la uropatía obstructiva.

INTRODUCTION: Urosepsis is an underdiagnosed entity with high morbidity and mortality and significant associated costs. The delay in diagnosis leads to an increased risk of multiorgan failure and death. Although its prognosis is better than that of other sepsis, the mortality rate is 20 - 40%. OBJECTIVE: Describe the obstructive uropathy cases (OU) that are complicated by severe sepsis (SS) and identify early biomarkers of SS. MATERIAL AND METHODS: Observational and prospective study of 65 patients with urgent high OU. All patients were evaluated at three different times (0, 24 and 48 hours). An SS predictor model has been constructed and a multivariate risk analysis has been carried out. RESULTS: 64.61% (n=42) developed SS (NSS: n=13). The only statistically significant variables in the 3 moments evaluated and that obtained a good area under the curve [AUROC (>0.70)] were the elevation of neutrophils, procalcitonin, and decrease of bicarbonate. At the time of patient admission, the variable that best predicted SS was the elevation of procalcitonin (AUROC:0.919). SS risk factors (p<0.005) were the history of cancer immunosuppression, and/or urinary tract surgeries, complete UO and high blood values of lactate, potassium and decrease of bicarbonate. The potassium-lactate combination on admission predicted SS with a probability function of 0.805. CONCLUSIONS: There is an analytical profile maintained over the time characteristic of SS that allows anearly identification of patients with OU subsidiary of been complicated with SS.

INTRODUCCIÓN: La Sepsis urinaria obstructiva (SUO) es una entidad infradiagnosticada con una elevada morbimortalidad e importantes costes asociados. El retraso en su diagnóstico condiciona un mayor riesgo de fracaso multiorgánico y fallecimiento. Aunque su pronóstico es mejor que el de otros focos de sepsis, su mortalidad es del 20 - 40%. OBJETIVO: Describir los cuadros de uropatía obstructiva (UO) que se complican con sepsis grave (SG) e identificarlos biomarcadores diagnósticos de SG en la UOde forma precoz.MATERIAL Y MÉTODOS: Estudio observacional y prospectivo de 72 pacientes con UO alta ingresados de manera urgente en el Servicio de Urología del Hospital Clínico Universitario de Valladolid. Todos los pacientes del estudio fueron evaluados en tres momentos diferentes (0, 24 y 48 horas). Se ha creado un modelo predictor de SG y se ha realizado un análisis multivariante de riesgo. RESULTADOS: El 64,61% de los pacientes (n=42) desarrolló SG (NSG: n=13). Las únicas variables estadísticamente significativas en los tres momentos evaluados y que obtenían una buena área bajo la curva [AUROC (>0,70)] fueron la elevación de neutrófilos y procalcitonina y la disminución de bicarbonato. En el momento del ingreso la variable que mejor predecía SG fue la elevación de procalcitonina (AUROC: 0,919). Los factores de riesgo de SG (p<0,05) fueron los antecedentes de cáncer, la inmunosupresión y/o cirugías de vías urinarias, la UO completa y los valores elevados en sangre de lactato y potasio y la disminución del bicarbonato en la gasometría venosa. La combinación potasio-lactato al ingreso predecía SG con una función de probabilidad de 0,805. CONCLUSIONES: Existe un perfil analítico, mantenido en el tiempo, característico de SG que permite la identificación precoz de los pacientes con UO subsidiarios de complicarse con SG.

Importancia de los parámetros clínicos y analíticos de la sepsis grave en la uropatía obstructiva / Relevance of clinical and serum parameters on severe urinary sepsis after renal obstruction

INTRODUCCIÓN: La Sepsis urinaria obstructiva (SUO) es una entidad infradiagnosticada con una elevada morbimortalidad e importantes costes asociados. El retraso en su diagnóstico condiciona un mayor riesgo de fracaso multiorgánico y fallecimiento. Aunque su pronóstico es mejor que el de otros focos de sepsis, su mortalidad es del 20 - 40%. OBJETIVO: Describir los cuadros de uropatía obstructiva (UO) que se complican con sepsis grave (SG) e identificarlos biomarcadores diagnósticos de SG en la UOde forma precoz. MATERIAL Y MÉTODOS: Estudio observacional y prospectivo de 72 pacientes con UO alta ingresados de manera urgente en el Servicio de Urología del Hospital Clínico Universitario de Valladolid. Todos los pacientes del estudio fueron evaluados en tres momentos diferentes (0, 24 y 48 horas). Se ha creado un modelo predictor de SG y se ha realizado un análisis multivariante de riesgo. RESULTADOS: El 64,61% de los pacientes (n=42) desarrolló SG (NSG: n=13). Las únicas variables estadísticamente significativas en los tres momentos evaluados y que obtenían una buena área bajo la curva [AUROC (>0,70)] fueron la elevación de neutrófilos y procalcitonina y la disminución de bicarbonato. En el momento del ingreso la variable que mejor predecía SG fue la elevación de procalcitonina (AUROC: 0,919). Los factores de riesgo de SG (p < 0,05) fueron los antecedentes de cáncer, la inmunosupresión y/o cirugías de vías urinarias, la UO completa y los valores elevados en sangre de lactato y potasio y la disminución del bicarbonato en la gasometría venosa. La combinación potasio-lactato al ingreso predecía SG con una función de probabilidad de 0,805. CONCLUSIONES: Existe un perfil analítico, mantenido en el tiempo, característico de SG que permite la identificación precoz de los pacientes con UO subsidiarios de complicarse con SG

INTRODUCTION: Urosepsis is an underdiagnosed entity with high morbidity and mortality and significant associated costs. The delay in diagnosis leads to an increased risk of multiorgan failure and death. Although its prognosis is better than that of other sepsis, the mortality rate is 20 - 40%. OBJECTIVE: Describe the obstructive uropathy cases (OU) that are complicated by severe sepsis (SS) and identify early biomarkers of SS. MATERIAL AND METHODS: Observational and prospective study of 65 patients with urgent high OU. All patients were evaluated at three different times (0, 24 and 48 hours). An SS predictor model has been constructed and a multivariate risk analysis has been carried out. RESULTS: 64.61% (n=42) developed SS (NSS: n=13). The only statistically significant variables in the 3 moments evaluated and that obtained a good area under the curve [AUROC (>0.70)] were the elevation of neutrophils, procalcitonin, and decrease of bicarbonate. At the time of patient admission, the variable that best predicted SS was the elevation of procalcitonin (AUROC: 0.919). SS risk factors (p < 0.05) were the history of cancer, immunosuppression, and/or urinary tract surgeries, complete UO and high blood values of lactate, potassium and decrease of bicarbonate. The potassium-lactate combination on admission predicted SS with a probability function of 0.805. CONCLUSIONS: There is an analytical profile maintained over the time characteristic of SS that allows an early identification of patients with OU subsidiary of been complicated with SS

Primary and metastatic renal hemangiopericytoma.

OBJECTIVE: Haemangiopericytoma is an uncommon perivascular tumor that occurs more frequently in soft tissues and is extremely rare in the kidney. METHODS: We report two cases: The first one is the case of a 57-year-old man with bilateral metastatic renal haemangiopericytoma which appeared 18 years after removal of a meningeal haemangiopericytoma. The second is a 29-year-old woman with a primary kidney haemangiopericytoma that was casually found in a nephrectomy piece. RESULTS: In the first case, radical left nephrectomy and right renal mass radiofrequency ablation were performed. The patient had an uneventful postoperatory recovery. He remained disease-free 22 months after surgery but two new lesions appeared that were treated with radiofrequency ablation. The second case was a casual finding, a small tumor that had been totally resected. CONCLUSIONS: Haemangiopericytoma is a rare tumor with an uncertain clinical behaviour. Long-term follow up is important as local recurrences and metastases can develop years after initial treatment.

Hemangiopericitoma renal primario y metastásico / Primary and metastatic renal hemangiopericytoma

OBJETIVO: El hemangiopericitoma es un raro tumor perivascular que aparece sobre todo en los tejidos blandos y que es muy inusual en el riñón. MÉTODO: Se describen dos casos. Caso 1: Varón de 57 años con un hemangiopericitoma renal bilateral metastásico que tuvo lugar 18 años después de la exéresis de un hemangiopericitoma meníngeo. Caso 2: Mujer de 29 con un hemangiopericitoma renal primario hallado de forma casual en la pieza de nefrectomía por una pionefrosis. RESULTADOS: En el primer caso se realizó una nefrectomía radical izquierda y ablación con rediofrecuencia de la masa renal derecha. El postoperatorio cursó sin complicaciones y no hubo signos de enfermedad durante 22 meses, hasta que aparecieron nuevas lesiones en riñón derecho, que fueron tratadas nuevamente con radiofrecuencia. El segundo caso fue un tumor de hallazgo casual, de escaso tamaño y totalmente resecado en la pieza quirúrgica. CONCLUSIONES: El hemangiopericitoma es un tumor raro y de comportamiento incierto, que requiere un seguimiento a largo plazo. La recidiva local y las metástasis pueden aparecer años después del tratamiento del tumor primario

OBJECTIVE: Haemangiopericytoma is an uncommon perivascular tumor that occurs more frequently in soft tissues and is extremely rare in the kidney. METHODS: We report two cases: The first one is the case of a 57-year-old man with bilateral metastatic renal haemangiopericytoma which appeared 18 years after removal of a meningeal haemangiopericytoma. The second is a 29-year-old woman with a primary kidney haemangiopericytoma that was casually found in a nephrectomy piece. RESULTS: In the first case, radical left nephrectomy and right renal mass radiofrequency ablation were performed. The patient had an uneventful postoperatory recovery. He remained disease-free 22 months after surgery but two new lesions appeared that were treated with radiofrequency ablation. The second case was a casual finding, a small tumor that had been totally resected. CONCLUSIONS: Haemangiopericytoma is a rare tumor with an uncertain clinical behaviour. Long-term follow up is important as local recurrences and metastases can develop years after initial treatment

Urinary incontinence during pregnancy and postpartum. Associated risk factors and influence of pelvic floor exercises.

OBJECTIVES: To determine the prevalence of urinary incontinence (UI) before pregnancy, in the third trimester and postpartum. To analyze its influence on quality of life and associated potential risk factors and the efficacy of pelvic floor exercises. METHODS: Prospective study in 413 pregnant women. The modified ICIQ-SF incontinence questionnaire was given to the pregnant women at the end of the third quarter. This questionnaire was administered by telephone at 3 and 6 months postpartum. The influence of several risk factors for UI in pregnancy and postpartum were analyzed. Patients with persistent UI at 6 months postpartum were trained to do pelvic floor exercises. RESULTS: Patients with UI before pregnancy were excluded from the study. UI in the third trimester was 31%. Analyzed risk factors did not condition a higher percentage of UI. Prevalence of UI was 11.3% at 3 months postpartum and 6.9% at 6 months. 70% of the incontinent patients already had it during pregnancy and it appeared de novo post-delivery in 30% of the patients. Prevalence of UI after delivery was higher in women with UI in pregnancy and lower in caesarean cases. Most women improved with pelvic floor exercises. CONCLUSIONS: Analysed risk factors did not significantly increase UI in pregnancy. Prevalence of UI after delivery is higher in women with UI in pregnancy and lower in caesarean cases. Postpartum pelvic floor exercises for three months in patients with persistent stress UI at 6 months postpartum clearly improved the degree of continence.

Incontinencia urinaria en embarazo y postparto. Factores de riesgo asociados e influencia de los ejercicios del suelo pélvico / Urinary incontinence during pregnancy and postpartum. Associated risk factors and influence of pelvic floor exercises

OBJETIVO: Determinar la prevalencia de incontinencia urinaria (IU) previa a la gestación, en el tercer trimestre y en el postparto. Analizar su influencia en la calidad de vida, los posibles factores de riesgo y la eficacia de los ejercicios del suelo pélvico. MÉTODOS: Estudio prospectivo a 413 gestantes. Se entregó el cuestionario de incontinencia ICIQ-SF modificado a las gestantes al final del tercer trimestre y a los 3 y 6 meses postparto. Se analizó la influencia de varios factores de riesgo de IU en el embarazo y en el postparto. Las pacientes con persistencia de IU a los 6 meses del parto fueron instruidas para realizar ejercicios de suelo pélvico. RESULTADOS: Las pacientes con IU previa a la gestación fueron excluidas. La prevalencia de incontinencia en el tercer trimestre en gestantes fue del 31%. Ningún factor de riesgo condicionó un mayor porcentaje de IU. La prevalencia de IU fue de 11.3 % a los tres meses del parto y del 6.9% a los 6 meses. De las pacientes incontinentes un 70% ya la sufría en el embarazo y en el 30% apareció de novo tras el parto. El porcentaje de IU postparto fue más elevado en mujeres con IU en la gestación y más bajo en aquellas con cesárea. La mayoría de las mujeres mejoraron con ejercicios de suelo pélvico. CONCLUSIONES: Ningún factor de riesgo aumenta el riesgo de IU en gestantes de forma significativa. La prevalencia de IU tras el parto es mayor en aquellas mujeres con IU en el embarazo y más baja en aquellas con cesárea. La mayoría de las puerperas mejoraron con ejercicios de suelo pélvico

OBJECTIVES: To determine the prevalence of urinary incontinence (UI) before pregnancy, in the third trimester and postpartum. To analyze its influence on quality of life and associated potential risk factors and the efficacy of pelvic floor exercises. METHODS: Prospective study in 413 pregnant women. The modified ICIQ-SF incontinence questionnaire was given to the pregnant women at the end of the third quarter. This questionnaire was administered by telephone at 3 and 6 months postpartum. The influence of several risk factors for UI in pregnancy and postpartum were analyzed. Patients with persistent UI at 6 months postpartum were trained to do pelvic floor exercises. RESULTS: Patients with UI before pregnancy were excluded from the study. UI in the third trimester was 31%. Analyzed risk factors did not condition a higher percentage of UI. Prevalence of UI was 11.3% at 3 months postpartum and 6.9% at 6 months. 70% of the incontinent patients already had it during pregnancy and it appeared de novo post-delivery in 30% of the patients. Prevalence of UI after delivery was higher in women with UI in pregnancy and lower in caesarean cases. Most women improved with pelvic floor exercises. CONCLUSIONS: Analysed risk factors did not significantly increase UI in pregnancy. Prevalence of UI after delivery is higher in women with UI in pregnancy and lower in caesarean cases. Postpartum pelvic floor exercises for three months in patients with persistent stress UI at 6 months postpartum clearly improved the degree of continence

Indicaciones y complicaciones de la embolización renal: análisis retrospectivo / Indications and complications of renal embolization: a retrospective analysis

La embolización renal es un procedimiento intervencionista, cuyas aplicaciones terapéuticas han variado a lo largo del tiempo. Realizamos una revisión retrospectiva de 48 embolizaciones, analizando las causas y complicaciones asociadas a esta técnica. Nuestra indicación principal fue la embolización prequirúrgica de tumores renales de gran tamaño, aunque la indicación de mayor relevancia clínica actual es el tratamiento conservador de fístulas arterio-venosas iatrogénicas, angiomiolipomas o traumatismos renales con sangrado activo. La complicación menor más frecuente es el síndrome post-embolización (52.8 por ciento), situación que remite fácilmente con tratamiento médico. Como complicaciones mayores destacan la sepsis y la migración de material embolígeno, ambos muy poco frecuentes en nuestra serie...

Renal embolization is an interventional procedure, whose therapeutic applications have varied over time. We conducted a retrospective review of 48 embolizations, analyzing the causes and complications associated with this technique. Our main indication was the preoperative embolization of large renal tumors, although the most relevant indication today is the conservative treatment of iatrogenic arteriovenous fistula, angiomyolipomas or renal trauma with active bleeding. The most common minor complication is post-embolization syndrome (52.8 percent), a situation that is easily managed with medical treatment. Major complications include sepsis and migration of embolic material and both are very rare in our series...

Testicular cancer: our experience after 10 years.

OBJECTIVES: Testicular cancer represents about 1% of malignant tumors in men. Of these tumors 95% are germ cell tumors (GCTs), which have a maximum incidence between the second and third decades of life. Our objective was to carry out a retrospective analysis of testicular tumor cases that had been diagnosed in our Health Area between the years 2000 and 2010. METHODS: We performed a retrospective descriptive study between the years 2000 and 2010 analyzing 43 patients treated for testicular cancer, including in the analysis tumor incidence, the patient's age, clinic attended, patient's time until appointment, presence of tumor markers, patient's time before treatment, use of testicular prostheses, histological type and their typical characteristics, oncological treatment, tumor progression and mortality rate. RESULTS: We found an incidence of 4-5 cases/100,000 population/year in our Health Area. Two-thirds of the cases were detected in Stage I, and 100% of these cases showed complete remission. Among those with higher stage tumors, two out of three patients were cured after chemotherapy. For the remaining one-third, rescue treatments managed to achieve a remission rate of 66%. Mortality was low and was linked to lymphoma or metastatic dissemination. CONCLUSION: The trend towards early diagnosis with detection during the initial cancer stages, together with current chemotherapy protocols, enables a high cure rate for testicular cancer. Mortality in our series was associated with primary or secondary lymphomas.

Cáncer testicular: Nuestra experiencia en 10 años / Testicular cancer: our experience after 10 years

OBJETIVO: El cáncer de testículo representa alrededor del 1% de los tumores malignos en el varón. El 95% corresponde a tumores germinales (TTG) cuya máxima incidencia tiene lugar entre la 2ª y 3ª década de la vida. Nuestro objetivo es realizar un análisis retrospectivo de los tumores testiculares diagnosticados en nuestra Área de Salud entre los años 2000 y 2010. MÉTODOS: Estudio descriptivo retrospectivo de los pacientes con cáncer testicular entre los años 2000 y 2010, analizándose un total de 43 pacientes, con evaluación de la incidencia, edad, presentación clínica, tiempo hasta la consulta, marcadores tumorales, tiempo hasta el tratamiento, solicitud de prótesis testicular, tipo histológico y características anatomopatológicas propias, tratamiento oncológico, progresión tumoral y mortalidad. RESULTADOS: En nuestro área de salud encontramos una incidencia de 4-5 casos-/100000habitantes/año. Las dos terceras partes de los casos se detectaron en Estadio I, consiguiendo remisión completa en el 100%. En Estadios superiores hay curación en 2 de cada 3 pacientes tras la quimioterapia y en el tercio restante, los tratamientos de rescate consiguen la remisión en el 66%. La mortalidad es baja y asociada a afectación por Linfoma o a diseminación metastásica. CONCLUSIÓN: La tendencia al diagnóstico precoz con detección en estadios iniciales, asociado a los actuales protocolos de quimioterapia, permiten altos índices de curación en el cáncer testicular. La mortalidad en nuestra serie se asocia mayoritariamente a afectación por Linfoma primario o secundario(AU)

OBJECTIVES: Testicular cancer represents about 1% of malignant tumors in men. Of these tumors 95% are germ cell tumors (GCTs), which have a maximum incidence between the second and third decades of life. Our objective was to carry out a retrospective analysis of testicular tumor cases that had been diagnosed in our Health Area between the years 2000 and 2010. METHODS: We performed a retrospective descriptive study between the years 2000 and 2010 analyzing 43 patients treated for testicular cancer, including in the analysis tumor incidence, the patient’s age, clinic attended, patient’s time until appointment, presence of tumor markers, patient’s time before treatment, use of testicular prostheses, histological type and their typical characteristics, oncological treatment, tumor progression and mortality rate. RESULTS: We found an incidence of 4-5 cases/100,000 population/year in our Health Area. Two-thirds of the cases were detected in Stage I, and 100% of these cases showed complete remission. Among those with higher stage tumors, two out of three patients were cured after chemotherapy. For the remaining one-third, rescue treatments managed to achieve a remission rate of 66%. Mortality was low and was linked to lymphoma or metastatic dissemination. CONCLUSION: The trend towards early diagnosis with detection during the initial cancer stages, together with current chemotherapy protocols, enables a high cure rate for testicular cancer. Mortality in our series was associated with primary or secondary lymphomas(AU)

Embolización de aneurisma calcificado de arteria renal en paciente monorreno / Calcified renal artery aneurism embolization in a solitary kidney

OBJETIVO: Revisar la presentación, diagnóstico y tratamiento de una entidad poco frecuente como los aneurismas de la arteria renal.MÉTODOS: Presentamos el caso de un paciente monorreno con un aneurisma renal calcificado sintomático.RESULTADOS: Los aneurismas de la arteria renal pueden provocar hipertensión, hematuria, dolor en flanco, o ser totalmente asintomáticos. Las causas más frecuentes son laarteriosclerosis y la displasia fibromuscular y el diagnóstico se basa en la tomografía computerizada y en la angiografía. El tratamiento puede ser quirúrgico, endovascular o expectante.CONCLUSIONES: Los aneurismas de la arteria renal son una patología sobre la que, por su baja prevalencia, no existen pautas claras de actuación. El número de casos diagnosticados ha aumentado en las últimas décadas y el tratamiento endovascular se muestra como una buena opción(AU)

OBJECTIVE: To review presentation, diagnosis and treatment of renal artery aneurysms, a very uncommon disease.METHODS: We report the case of a male with a calcified renal artery aneurysm in a solitary kidney.RESULTS: Symptomatic effects may be hypertension, hematuria or flank pain. Arteriosclerosis and medial dysplasia are the most frequent causes and diagnosis is based on CT scan and angiography.CONCLUSIONS: The renal artery aneurysm is a disease with low prevalence and there is no clear protocol for management. The number of cases has increased over the last decades and endovasculrar treatment is a good therapeutic option(AU)

[Posterior nutcracker syndrome: retroaortic renal vein associated with arteriovenous fistula and renal cancinoma. Report of a case and review of literature]. / Síndrome del cascanueces posterior: vena renal retroaórtica asociada a fístula arteriovenosa y carcinoma renal. A propósito de un caso y revisión de la literatura.

Vascular retroperitoneal alterations are little frequent and nevertheless, more diagnosed. We presented a case of association very little frequents in which a vascular congenital malformation is related to the presence of a renal arteriovenous fistula and a left renal carcinoma in a patient who only presented hematuria. These vascular variations must be considered at the moment for planning a surgery with the purpose of making it safer and to avoid complications. The case is discussed and literature is reviewed.

Síndrome del cascanueces posterior: Vena renal retroaórtica asociada a fístula arteriovenosa y carcinoma renal. A propósito de un caso y revisión de la literatura / Posterior nutcracker syndrome: retroaortic renal vein associated with arteriovenous fistula and renal cancinoma. Report of a case and review of literature

Las alteraciones vasculares del retroperitoneo son poco frecuentes y sin embargo, cada vez más diagnosticadas. Presentamos un caso de asociación muy poco frecuente en el que se relaciona una malformación congénita vascular con la presencia de una fístula arteriovenosa renal y un carcinoma renal izquierdo en una paciente que sólo presentó hematuria. Estas variaciones vasculares deben ser consideradas en el momento de planificar una cirugía con la finalidad de hacerla más segura y con menos complicaciones. Se discute el caso y se revisa la literatura (AU)

Vascular retroperitoneal alterations are little frequent and nevertheless, more diagnosed. We presented a case of association very little frequents in which a vascular congenital malformation is related to the presence of a renal arteriovenous fistula and a left renal carcinoma in a patient who only presented hematuria. These vascular variations must be considered at the moment for planning a surgery with the purpose of making it safer and to avoid complications. The case is discussed and literature is reviewed (AU)

[Tumors of the upper urinary tract. Our experience]. / Tumores del tracto urinario superior. Nuestra experiencia.

OBJECTIVES: To study the clinical presentation, diagnosis, treatment, and evolution of upper urinary tract tumours. METHODS: We carried out a retrospective study on the upper urinary tract tumours treated in our centre, HCU Valladolid, between 1994 and 2007. RESULTS: 65 tumours were diagnosed, although only 59 were valid for the study. Mean patient age was 68 years (interval between 46 and 88 years). 47 were men and 12 women. The most common symptom on presentation was hematuria (79.9%). Urography was the most frequently used diagnostic technique (96.6%) and nephroureterectomy with transurethral resection of the intramural ureter was the most common surgical treatment performed, carried out in 28 cases. 9 patients underwent percutaneous treatment with only one recurrence, and 2 patients received ureteroscopic treatment. 50.9% of the lesions were classified as superficial tumours. The 5 and 10-year survival rates were 55 and 47%. CONCLUSIONS: Upper urinary tract tumours are an unusual disease characteristic of medium-advanced ages. Nowadays nephroureterectomy by open surgery or laparoscopy is the standard treatment. Conservative endoscopic procedures have more and more importance and present excellent results in highly selected cases.

Carcinoma de células escamosas en pelvis renal bífida tras nefrolitotomía percutánea / Squamous cell carcinoma in a duplicated renal pelvis after percutaneous nephrolithotomy

Objetivo: Describir un caso clínico de un paciente que presenta un carcinoma de células escamosas en una pelvis renal bífida, tras la realización de una nefrolitotomía percutánea. Métodos/Resultados: Paciente varón de 68 años de edad, diagnósticado de carcinoma escamoso de pelvis renal, tras el estudio histológico de una nefrectomía polar inferior posterior a una nefrolitotomía percutánea por una litiasis coraliforme en hemirriñón izquierdo. El paciente sufrió una recidiva vesical un año y medio más tarde, se practicó una cistoprostratectomía radical, pero el fallecimiento se dio a los pocos meses ante la presencia de metástasis. Conclusiones: El carcinoma de células escamosas de pelvis renal, es un tumor raro y de mal pronóstico, generalmente asociado con enfermedad litiásica e infección crónica. La realización de biopsias de zonas sospechosas durante la nefrolitotomía percutánea puede ayudar al diagnóstico precoz del tumor, con la consiguiente mejoría de la supervivencia (AU)

Objective: To describe the clinical case of a patient presenting a squamous cell carcinoma in a duplicated renal pelvis, after percutaneous nephrolithotomy. Methods/Results: 60-year-old male patient who was diagnosed of a squamous cell carcinoma of the renal pelvis in the pathological study of a lower pole nephrectomy after percutaneous nephrolithotomy for staghorn calculi in the left lower pole renal moiety. The patient suffered a bladder recurrence one year and a half later. A radical cystoprostatectomy was performed, but the patient died in a few months due to metastasis. Conclusions: Squamous cell carcinoma of the renal pelvis is a rare tumor with poor prognosis, associated with stone disease and chronic infection. Taking biopsies from suspicious lesions during percutaneous nephrolithotomy may help early diagnosis and improve survival (AU)

Metástasis cutánea solitaria de carcinoma vesical / Solitary skin metastasis from a bladder carcinoma

Las metástasis cutáneas del carcinoma urotelial de vejiga son muy raras, se relacionan con estadios avanzados de la enfermedad y tiene un pronóstico desfavorable con baja tasa de supervivencia. Se presenta un caso de metástasis cutánea posterior a manipulación urológica en un paciente con un carcinoma vesical infiltrante metastático a otros órganos y con desfavorable respuesta al tratamiento. Se discute el caso y se revisa la literatura (AU)

Cutaneous metastases from urothelial carcinomas of the bladder are very rare. They are related to advanced stages of the disease and have poor prognosis with low survival rates. We report one case of cutaneous metastasis appearing after urological manipulation in a patient with bladder muscle invasive carcinoma, with other metastatic sites and poor response to treatment. The case is discussed and literature is reviewed (AU)

[Solitary skin metastasis from a bladder carcinoma]. / Metástasis cutánea solitaria de carcinoma vesical.

Cutaneous metastases from urothelial carcinomas of the bladder are very rare. They are related to advanced stages of the disease and have poor prognosis with low survival rates. We report one case of cutaneous metastasis appearing after urological manipulation in a patient with bladder muscle invasive carcinoma, with other metastatic sites and poor response to treatment. The case is discussed and literature is reviewed.