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1.
Urol J ; 19(6): 427-432, 2022 Dec 06.
Artigo em Inglês | MEDLINE | ID: mdl-36127884

RESUMO

PURPOSE: To evaluate the safety and efficacy of conventional laparoscopic vs open Lich-Gregoir ureteral reimplantation in pediatric vesicoureteral reflux. MATERIAL AND METHODS: A retrospective study was conducted in a tertiary care hospital. Patients with vesicoureteral reflux who underwent open or laparoscopic Lich-Gregoir ureteral reimplantation from 2013-2020 were included.  The primary outcome was resolution of reflux. Complications and perioperative characteristics were evaluated. The outcomes between open and laparoscopic surgery were analyzed. RESULTS: A total of 110 patients and 150 ureters were included. The mean age was 4.5 years ± 3.4 and 73.6% were females. A total of 125 ureters (83.3%) underwent laparoscopic and 25 (16.6%) open Lich-Gregoir vesicoureteral reimplantation (5:1 Ratio). Resolution was reported in 112 (89.6%) for laparoscopy and 21 (84%) for open surgery (P = .42). Mean surgical time for laparoscopy and open surgery were 142.4 min ± 64.4 and 153 min ± 40, respectively (P =.29). Mean bleeding (9.5 mL ± 11.2 vs 29.6 mL ± 22.8) and length of hospital stay (2.4 days ± 2.3 vs 5.05 ± 3.1) were significantly higher with open surgery (P < .001). No significant difference in complications was reported between open surgery (32%) and laparoscopic approach (22.4%) (P = .305). CONCLUSION: Conventional laparoscopic vesicoureteral reimplantation with the Lich-Gregoir technique has an acceptable success rate comparable with open surgery, with shorter hospital stay, less bleeding, and less need of transfusion.


Assuntos
Laparoscopia , Humanos , Criança , Pré-Escolar , Estudos Retrospectivos , Laparoscopia/efeitos adversos
4.
Sci Adv ; 7(15)2021 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-33827824

RESUMO

Graphene is conceivably the most nonlinear optoelectronic material we know. Its nonlinear optical coefficients in the terahertz frequency range surpass those of other materials by many orders of magnitude. Here, we show that the terahertz nonlinearity of graphene, both for ultrashort single-cycle and quasi-monochromatic multicycle input terahertz signals, can be efficiently controlled using electrical gating, with gating voltages as low as a few volts. For example, optimal electrical gating enhances the power conversion efficiency in terahertz third-harmonic generation in graphene by about two orders of magnitude. Our experimental results are in quantitative agreement with a physical model of the graphene nonlinearity, describing the time-dependent thermodynamic balance maintained within the electronic population of graphene during interaction with ultrafast electric fields. Our results can serve as a basis for straightforward and accurate design of devices and applications for efficient electronic signal processing in graphene at ultrahigh frequencies.

5.
Rev. int. androl. (Internet) ; 18(3): 96-100, jul.-sept. 2020. tab
Artigo em Espanhol | IBECS | ID: ibc-193600

RESUMO

INTRODUCCIÓN: La microlitiasis testicular (MT) es un hallazgo clínico poco frecuente en población general masculina; dichas calcificaciones son reportadas por ultrasonidos testiculares y constituyen un hallazgo incidental. La presencia de MT se encuentra asociada a carcinoma testicular. OBJETIVOS: Analizar la relación entre variables clínicas, demográficas, comorbilidades y marcadores tumorales con la presencia o ausencia de microlitiasis en sujetos con cáncer testicular. MATERIAL Y MÉTODOS: Estudio retrospectivo donde se incluyó un total de 66 pacientes con diagnóstico de carcinoma testicular del año 2012 al 2017 en un hospital del noreste de México. Se dividió el total de los pacientes en 2 grupos según la presencia o ausencia de MT, y se analizaron las características clínicas de estos. RESULTADOS: La prevalencia general de MT fue de un 31,8%. El principal tumor observado en los reportes de patología fue el tumor de células germinales no seminomatoso (54,4%). La incidencia de metástasis a órganos fue del 27,3%. No se encontraron diferencias estadísticamente significativas al comparar las variables de interés en el grupo con y sin MT. Se encontró una relación entre la elevación de alfa-fetoproteína y los tumores no seminomatosos (p = 0,003). CONCLUSIONES: De acuerdo con los resultados obtenidos, se puede decir que las MT constituyen un hallazgo clínico que no tiene relación con el pronóstico de la enfermedad y que además no se relacionan con ninguna de las comorbilidades y datos clínicos analizados


INTRODUCTION: Testicular microlithiasis (TM) is an uncommon finding in general male population. These calcifications are reported by testicular ultrasound performed by some testicular pathology and constitute an incidental finding. The presence of TM is regularly associated to testicular neoplasms. OBJECTIVES: To investigate the relationship between clinical and demographic factors, comorbidities and tumor biomarkers, and the presence or absence of microlithiasis in patients with testicular cancer. MATERIAL AND METHODS: A retrospective study including a total of 66 patients diagnosed with testicular carcinoma from 2012 to 2017 in a hospital in Northeastern Mexico. The total of patients was divided into 2 groups according to the presence or absence of MT and the clinical features of these were analyzed. RESULTS: There was a general prevalence of TM of 31.8%. The main tumor found in the pathology reports corresponded to the non seminomatous germ cells tumor (54.4%). The incidence of metastasis to organs was of 27.3%. No statistically significant differences were found when comparing the variables of interest in the group with and without MT. A relationship was found between the elevation of alpha-fetoprotein and non-seminomatous tumors compared to seminomatous tumors (PY=Y.003). CONCLUSIONS: According to the results obtained, it can be suggested that TM is a clinical finding that is not related to the prognosis of the disease or any of the comorbidities and clinical data analyzed in our study


Assuntos
Humanos , Masculino , Adulto Jovem , Adulto , Neoplasias Testiculares/complicações , Neoplasias Testiculares/diagnóstico , Doenças Testiculares/complicações , Calcinose/complicações , Estudos Retrospectivos , Estudos Transversais , Neoplasias Embrionárias de Células Germinativas/complicações , Comorbidade
6.
Science ; 368(6496): 1219-1223, 2020 06 12.
Artigo em Inglês | MEDLINE | ID: mdl-32527826

RESUMO

Acoustic graphene plasmons are highly confined electromagnetic modes carrying large momentum and low loss in the mid-infrared and terahertz spectra. However, until now they have been restricted to micrometer-scale areas, reducing their confinement potential by several orders of magnitude. Using a graphene-based magnetic resonator, we realized single, nanometer-scale acoustic graphene plasmon cavities, reaching mode volume confinement factors of ~5 × 1010 Such a cavity acts as a mid-infrared nanoantenna, which is efficiently excited from the far field and is electrically tunable over an extremely large broadband spectrum. Our approach provides a platform for studying ultrastrong-coupling phenomena, such as chemical manipulation via vibrational strong coupling, as well as a path to efficient detectors and sensors operating in this long-wavelength spectral range.

7.
Rev Int Androl ; 18(3): 96-100, 2020.
Artigo em Espanhol | MEDLINE | ID: mdl-31383611

RESUMO

INTRODUCTION: Testicular microlithiasis (TM) is an uncommon finding in general male population. These calcifications are reported by testicular ultrasound performed by some testicular pathology and constitute an incidental finding. The presence of TM is regularly associated to testicular neoplasms. OBJECTIVES: To investigate the relationship between clinical and demographic factors, comorbidities and tumor biomarkers, and the presence or absence of microlithiasis in patients with testicular cancer. MATERIAL AND METHODS: A retrospective study including a total of 66 patients diagnosed with testicular carcinoma from 2012 to 2017 in a hospital in Northeastern Mexico. The total of patients was divided into 2 groups according to the presence or absence of MT and the clinical features of these were analyzed. RESULTS: There was a general prevalence of TM of 31.8%. The main tumor found in the pathology reports corresponded to the non seminomatous germ cells tumor (54.4%). The incidence of metastasis to organs was of 27.3%. No statistically significant differences were found when comparing the variables of interest in the group with and without MT. A relationship was found between the elevation of alpha-fetoprotein and non-seminomatous tumors compared to seminomatous tumors (PY=Y.003). CONCLUSIONS: According to the results obtained, it can be suggested that TM is a clinical finding that is not related to the prognosis of the disease or any of the comorbidities and clinical data analyzed in our study.


Assuntos
Cálculos/diagnóstico , Neoplasias Embrionárias de Células Germinativas/diagnóstico , Doenças Testiculares/diagnóstico , Neoplasias Testiculares/diagnóstico , Adulto , Biomarcadores Tumorais/metabolismo , Cálculos/epidemiologia , Cálculos/patologia , Estudos Transversais , Humanos , Incidência , Masculino , Metástase Neoplásica , Neoplasias Embrionárias de Células Germinativas/patologia , Prevalência , Prognóstico , Estudos Retrospectivos , Doenças Testiculares/epidemiologia , Doenças Testiculares/patologia , Neoplasias Testiculares/patologia , Ultrassonografia , Adulto Jovem , alfa-Fetoproteínas/metabolismo
8.
Arch Esp Urol ; 67(2): 199-203, 2014 Mar.
Artigo em Inglês, Espanhol | MEDLINE | ID: mdl-24691043

RESUMO

OBJECTIVES: We describe a case of hyaline vascular type Castleman 's disease with unifocal presentation as retroperitoneal mass. We describe the pathological and radiological findings and present a bibliographic review. METHODS: Castleman's disease is a rare benign disease of unknown etiology characterized by a lymphoproliferative disorder. Two clinical types have been described: localized and multicentric. Isolated retroperitoneal involvement is uncommon. RESULTS: 39-year-old female who complained of back pain. Abdominal CT scan identified a 5 cm retroperitoneal interaortocaval mass. Complete laparoscopic excision was performed. Pathological study showed localized angiofollicular hyperplasia (hyaline vascular type Castleman's disease). CONCLUSIONS: The presentation of Castleman's disease as isolated retroperitonealmass is quite rare and should be distinguished from other retroperitoneal lesions of malignant character. The treatment of choice is surgery, providing a definitive and curative diagnosis. Operative biopsy may be useful.


Assuntos
Hiperplasia do Linfonodo Gigante/complicações , Neoplasias Retroperitoneais/etiologia , Adulto , Dor nas Costas/etiologia , Hiperplasia do Linfonodo Gigante/patologia , Hiperplasia do Linfonodo Gigante/cirurgia , Feminino , Humanos , Neoplasias Retroperitoneais/patologia , Neoplasias Retroperitoneais/cirurgia , Tomografia Computadorizada por Raios X
9.
Arch. esp. urol. (Ed. impr.) ; 67(2): 199-203, mar. 2014. ilus
Artigo em Espanhol | IBECS | ID: ibc-119921

RESUMO

OBJETIVOS: Describimos un caso de enfermedad de Castleman variante hialino vascular de presentación unifocal como masa retroperitoneal. Se destacan hallazgos radiológicos y anatomopatológicos de esta enfermedad con revisión de la literatura. MÉTODOS: La enfermedad de Castleman es una rara enfermedad benigna de etiología desconocida caracterizada por un desorden linfoproliferativo. Puede presentarse de forma unifocal o multifocal. La afectación retroperitoneal aislada es infrecuente. RESULTADOS: Mujer de 39 años que consulta por lumbalgia. Se realiza TAC abdominal identificándose masa retroperitoneal de 5 cm interaortocava. Es intervenida mediante laparoscopia consiguiéndose la exéresis completa. El estudio anatomopatológico demostró hiperplasia angiofolicular localizada (variante hialino vascular de la enfermedad de Castleman). CONCLUSIONES: La presentación de la enfermedad de Castleman como masa retroperitoneal aislada es bastante infrecuente y debe distinguirse de otras lesiones retroperitoneales de carácter maligno. El tratamiento de elección es quirúrgico, aporta el diagnóstico definitivo, y resulta curativo. La biopsia operatoria puede ser de gran utilidad


OBJECTIVES: We describe a case of hyaline vascular type Castleman’s disease with unifocal presentation as retroperitoneal mass. We describe the pathological and radiological findings and present a bibliographic review. METHODS: Castleman’s disease is a rare benign disease of unknown etiology characterized by a lymphoproliferative disorder. Two clinical types have been described: localized and multicentric. Isolated retroperitoneal involvement is uncommon. RESULTS: 39-year-old female who complained of back pain. Abdominal CT scan identified a 5 cm retroperitoneal interaortocaval mass. Complete laparoscopic excision was performed. Pathological study showed localized angiofollicular hyperplasia (hyaline vascular type Castleman’s disease). CONCLUSIONS: The presentation of Castleman’s disease as isolated retroperitonealmass is quite rare and should be distinguished from other retroperitoneal lesions of malignant character. The treatment of choice is surgery, providing a definitive and curative diagnosis. Operative biopsy may be useful


Assuntos
Humanos , Hiperplasia do Linfonodo Gigante/patologia , Neoplasias Retroperitoneais/patologia , Biópsia , Diagnóstico Diferencial
10.
Rev. chil. urol ; 75(3/4): 269-272, 2010.
Artigo em Espanhol | LILACS | ID: lil-654795

RESUMO

Se presenta un hombre de 20 años de edad que sufre lesión traumática testicular durante práctica de artes marciales. Se discute el papel de la ecografía y de la exploración quirúrgica.


We present a man 20 years of age that suffered a traumatic testicular injury during the practice of martial arts. The role of echography and surgical exploration are discussed.


Assuntos
Humanos , Masculino , Adulto Jovem , Ultrassonografia , Artes Marciais/lesões , Testículo/cirurgia , Testículo/lesões
11.
Arch Esp Urol ; 62(3): 233-6, 2009 Apr.
Artigo em Espanhol | MEDLINE | ID: mdl-19554776

RESUMO

OBJECTIVE: We present a rare localization for a foreing body in the urinary system, and review the bibliography to know about it existence, frequency and localization. METHODS: We present the case of a 49 year old woman who referreds she had introduced a metallic objet in her genital area. RESULTS: After the necessary tests, we could see a metallic cylinder. It was 8 cm long and was localized inside the right pelvic ureter. CONCLUSIONS: The presence of strange bodies in the urinary system is a rare urological emergency. Treatment is the key element of the extraction of the least bloody way possible.


Assuntos
Corpos Estranhos , Uretra , Feminino , Corpos Estranhos/diagnóstico , Corpos Estranhos/cirurgia , Humanos , Pessoa de Meia-Idade
12.
Arch. esp. urol. (Ed. impr.) ; 62(3): 230-232, abr. 2009. ilus
Artigo em Espanhol | IBECS | ID: ibc-60198

RESUMO

OBJETIVO: Dar a conocer un caso de presentación atípica de linfoma vesical primario tratado en nuestro hospital, así como revisar la bibliografía de este tipo de tumores, que representan el 0.2% de los tumores vesicales, siendo su forma de presentación más frecuente la hematuria macroscópica con coágulos.MÉTODOS: Presentamos el caso de un varón de 83 años, que acudió a Urgencias por oligoanuria de 48h de evolución, en el que se diagnosticó un tumor vesical.RESULTADO: La anatomía patológica resulto ser un linfoma vesical primario de células B.CONCLUSIONES: El linfoma vesical primario es una entidad poco frecuente, que cursa de forma indistinguible a otros tumores vesicales, presentando una buena respuesta al tratamiento con quimioterapia(AU)


OBJECTIVE: We report the event of an atypical presentation of primary bladder lymphoma, treated in our hospital, and review the literature of such tumors, representing 0,2% of bladder tumors, being macroscopic hematuria with clots the most frequent reason for patient consultation.METHODS: We report the case of an 83 years old man who went to the emergency room because of oligoanuria of 48 hours of evolution. He was diagnosed of bladder tumor.RESULTS: The pathology turned out to be a primary bladder lymphoma cell B.CONCLUSIONS: Primary bladder lymphoma is a rare entity that presents a similar behaviour to other bladder tumors, having a good response to treatment with chemotherapy(AU)


Assuntos
Humanos , Masculino , Idoso , Obstrução do Colo da Bexiga Urinária/complicações , Obstrução do Colo da Bexiga Urinária/diagnóstico , Neoplasias da Bexiga Urinária/diagnóstico , Linfoma/tratamento farmacológico , Hematúria/complicações , Ciclofosfamida/uso terapêutico , Vincristina/uso terapêutico , Prednisona/uso terapêutico , Neoplasias da Bexiga Urinária/tratamento farmacológico , Hematúria/fisiopatologia , Linfoma/complicações , Neoplasias da Bexiga Urinária/complicações , Hematúria , Imuno-Histoquímica/métodos , Imuno-Histoquímica/tendências
13.
Arch. esp. urol. (Ed. impr.) ; 62(3): 233-236, abr. 2009. ilus
Artigo em Espanhol | IBECS | ID: ibc-60199

RESUMO

OBJETIVO: Presentar una localización atípica de cuerpos extraños en el interior del aparato urinario, así como revisar en la bibliografía su existencia, frecuencia y localización.MÉTODOS: Presentamos el caso de una mujer de 49 años, que refiere la introducción de un objeto metálico en el área genital.RESULTADO: Tras la realización de las pruebas complementarias pertinentes, se objetiva un cilindro metálico de 8 cm de longitud, localizado en el interior del uréter pelviano derecho.CONCLUSIÓN: La presencia de cuerpos extraños en el interior del aparato urinario es una rara urgencia urológica, su tratamiento fundamental consiste en la extracción del elemento de la manera menos cruenta posible(AU)


OBJECTIVE: We present a rare localization for a foreing body in the urinary system, and review the bibliography to know about it existence, frequency and lo-calization.METHODS: We present the case of a 49 year old woman who referreds she had introduced a metallic objet in her genital area.RESULTS: After the necessary tests, we could see a metallic cylinder. It was 8 cm long and was localized inside the right pelvic ureter.CONCLUSIONS: The presence of strange bodies in the urinary system is a rare urological emergency. Treatment is the key element of the extraction of the least bloody way possible(AU)


Assuntos
Humanos , Feminino , Pessoa de Meia-Idade , Corpos Estranhos/complicações , Corpos Estranhos , Ureter/cirurgia , Ureter , Radiografia Abdominal/métodos , Cistoscopia/métodos , Cistoscopia/tendências , Abdome , Diafragma da Pelve , Hematúria/complicações , Litíase/complicações , /métodos
14.
J Urol ; 178(6): 2337-9, 2007 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-17936805

RESUMO

PURPOSE: We evaluated the results of laser photocoagulation of recurrent low stage noninvasive bladder cancer. MATERIALS AND METHODS: The study included 36 patients with a recurrent superficial papillary tumor within 1 year of endoscopic resection. Patients underwent laser photocoagulation of the recurrence under local anesthesia and sedation. They received early instillation of 40 mg mitomycin C and were discharged home without a catheter a few hours after the operation. Patients completed a visual analog scale to quantify the perceived level of pain, including 1--no pain to 10--maximum pain. Patients were reviewed after 3, 6 and 12 months to evaluate tumor recurrence. RESULTS: The mean and median visual analog scale score was 3 points (range 1 to 10). No patient had urinary infection or a catheter at hospital discharge. The incidence of recurrence at 12 months was 25%, mainly in the first 15 cases. CONCLUSIONS: Laser photocoagulation with local anesthesia and sedation is easy to perform and well tolerated. There were no complications and the recurrence rate was similar to that of transurethral resection, as calculated using the recurrence calculator of the 2006 guidelines on TaT1 (nonmuscle invasive) bladder cancer from the European Association of Urology.


Assuntos
Carcinoma de Células de Transição/terapia , Fotocoagulação a Laser/métodos , Mitomicina/administração & dosagem , Recidiva Local de Neoplasia/patologia , Recidiva Local de Neoplasia/terapia , Neoplasias da Bexiga Urinária/terapia , Administração Intravesical , Idoso , Idoso de 80 Anos ou mais , Anestesia Local/métodos , Carcinoma de Células de Transição/patologia , Terapia Combinada , Seguimentos , Hólmio/uso terapêutico , Humanos , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Medição da Dor , Dor Pós-Operatória/fisiopatologia , Estudos Prospectivos , Medição de Risco , Resultado do Tratamento , Neoplasias da Bexiga Urinária/patologia
15.
Ginecol. obstet. Méx ; 57: 287-90, oct. 1989. ilus
Artigo em Espanhol | LILACS | ID: lil-93691

RESUMO

Se informa de un caso de litoquelifopedion en una paciente de 40 años de edad, que permaneció con un feto muerto de 24 semanas de gestación durante nueve años. El caso se diagnosticó por clínica y por ultrasonografía. Su resolución fue quirúrgica. Se comentan los factores que condiciona su formación y se efectúa la correlación anatomoclínica del caso


Assuntos
Gravidez , Humanos , Feminino , Aborto Retido/cirurgia , Calcificação Fisiológica , Feto , México , Mudanças Depois da Morte
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