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1.
World J Urol ; 33(11): 1807-14, 2015 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-25805189

RESUMEN

PURPOSE: Cancer control of partial nephrectomy for high-risk localized renal cell carcinoma is unclear. To assess whether PN provides adequate cancer control in high-risk disease (HRD), survival outcomes were compared in both a population-based cohort and an institutional cohort. METHODS: Surveillance, Epidemiology, and End Results database and a prospectively maintained institutional database were queried for patients with RCC who underwent PN or RN for a localized tumor ≤7 cm and were found to have high-grade and/or high-stage disease (HRD). Cancer-specific (CSS) or recurrence-free survival (RFS) and overall survival (OS) were primary outcomes measured and were compared between those who underwent PN and RN using multivariable Cox proportional hazards and propensity analysis. RESULTS: The population cohort consisted of 12,757 (24.9 %) patients with HRD, 85.2 and 14.8 % of which underwent RN and PN, respectively. RN was not associated with CSS (HR 1.23, p = 0.08) but was independently associated with poor OS (HR 1.16, p = 0.031). Propensity analysis showed that RN resulted in a 20 % increased risk of death from all causes (p = 0.008). In the institutional cohort, of 317 patients, 35.9 % had HRD, 56 and 52 of which underwent RN and PN, respectively. Adjusting for age-adjusted Charlson index, RN was a predictor of poor OS (OR 6.20, p = 0.041). Propensity analysis showed that RFS and OS were not related to nephrectomy type (RN HR 0.65, p = 0.627 and RN HR 1.70, p = 0.484). CONCLUSIONS: In patients with pathologic high-risk RCC, partial excision is associated with similar cancer control as compared to radical excision.


Asunto(s)
Carcinoma de Células Renales/cirugía , Neoplasias Renales/cirugía , Estadificación de Neoplasias/métodos , Nefrectomía , Vigilancia de la Población/métodos , Complicaciones Posoperatorias/epidemiología , Programa de VERF , Carcinoma de Células Renales/mortalidad , Carcinoma de Células Renales/patología , Supervivencia sin Enfermedad , Femenino , Estudios de Seguimiento , Humanos , Neoplasias Renales/mortalidad , Neoplasias Renales/patología , Masculino , Persona de Mediana Edad , New York/epidemiología , Pronóstico , Puntaje de Propensión , Estudios Retrospectivos , Factores de Riesgo , Tasa de Supervivencia/tendencias , Factores de Tiempo
2.
J Neurosci ; 33(11): 4634-41, 2013 Mar 13.
Artículo en Inglés | MEDLINE | ID: mdl-23486938

RESUMEN

Learning interference occurs when learning something new causes forgetting of an older memory (retrograde interference) or when learning a new task disrupts learning of a second subsequent task (anterograde interference). This phenomenon, described in cognitive, sensory, and motor domains, limits our ability to learn multiple tasks in close succession. It has been suggested that the source of interference is competition of neural resources, although the neuronal mechanisms are unknown. Learning induces long-term potentiation (LTP), which can ultimately limit the ability to induce further LTP, a phenomenon known as occlusion. In humans we quantified the magnitude of occlusion of anodal transcranial direct current stimulation-induced increased excitability after learning a skill task as an index of the amount of LTP-like plasticity used. We found that retention of a newly acquired skill, as reflected by performance in the second day of practice, is proportional to the magnitude of occlusion. Moreover, the degree of behavioral interference was correlated with the magnitude of occlusion. Individuals with larger occlusion after learning the first skill were (1) more resilient to retrograde interference and (2) experienced larger anterograde interference when training a second task, as expressed by decreased performance of the learned skill in the second day of practice. This effect was not observed if sufficient time elapsed between training the two skills and LTP-like occlusion was not present. These findings suggest competition of LTP-like plasticity is a factor that limits the ability to remember multiple tasks trained in close succession.


Asunto(s)
Potenciales Evocados Motores/fisiología , Discapacidades para el Aprendizaje/fisiopatología , Potenciación a Largo Plazo/fisiología , Destreza Motora/fisiología , Inhibición Neural/fisiología , Adolescente , Adulto , Análisis de Varianza , Estimulación Eléctrica , Electromiografía , Femenino , Humanos , Discapacidades para el Aprendizaje/etiología , Masculino , Corteza Motora/fisiología , Estimulación Luminosa , Análisis de Regresión , Factores de Tiempo , Estimulación Magnética Transcraneal , Adulto Joven
3.
Can J Urol ; 19(1): 6111-7, 2012 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-22316513

RESUMEN

INTRODUCTION: Treatment of the elderly patient with a small renal mass is becoming a common conundrum with scant data available to support treatment decisions. Goals were to assess risk of surgical treatment for renal cell carcinoma (RCC) in the elderly as compared to their younger counterparts. MATERIALS AND METHODS: A prospectively maintained database consisting of all renal tumors between August 2004 and November 2009 was utilized. Patients who underwent extirpative treatment for RCC were divided into groups based on age cutoff of < 75 and ≥ 75 years old. Primary outcome measures were likelihood of partial nephrectomy versus radical nephrectomy, complication rates, and overall and cancer-specific survival. A secondary outcome investigated was renal function. RESULTS: Of 347 patients identified, 273 were < 75, and 74 were ≥ 75 years old. The elderly group was less likely to undergo partial nephrectomy (26% versus 43%, p = 0.045). They also had a higher rate of pT3 disease (20% versus 11%, p = 0.018), worse baseline renal function (46 mL/min/m(2) versus 92 mL/min/m(2), p < 0.001) and a longer length of stay (3.5 days versus 2.2 days, p < 0.001). Complication rates and survival outcomes were similar between the groups. Only Eastern Cooperative Oncology Group (ECOG) ≥ 1 and Charlson index ≥ 2 predicted likelihood of experiencing a complication. CONCLUSIONS: Despite a longer length of stay, renal surgery is safe in selected elderly patients with minimal comorbidity and good functional status. The elderly have reduced baseline renal function indicating nephron sparing should be chosen whenever possible, when surgical intervention is elected.


Asunto(s)
Carcinoma de Células Renales/cirugía , Neoplasias Renales/cirugía , Nefrectomía , Anciano , Carcinoma de Células Renales/epidemiología , Carcinoma de Células Renales/patología , Comorbilidad , Tasa de Filtración Glomerular , Humanos , Estimación de Kaplan-Meier , Neoplasias Renales/epidemiología , Neoplasias Renales/patología , Tiempo de Internación , Persona de Mediana Edad , Análisis Multivariante , Nefrectomía/efectos adversos , Complicaciones Posoperatorias/epidemiología , Modelos de Riesgos Proporcionales , Resultado del Tratamiento
4.
Fed Pract ; 39(Suppl 2): S58-S61, 2022 May.
Artículo en Inglés | MEDLINE | ID: mdl-35929007

RESUMEN

Background: Penile leiomyosarcoma arises from smooth muscles, which can be from dartos fascia, erector pili in the skin covering the shaft, or from tunica media of the superficial vessels and cavernosa. We describe presentation, treatment options, and recurrence pattern of this rare malignancy. Case Presentation: We present a case of penile leiomyosarcoma in a 70-year-old patient who presented to the urology clinic with 1-year history of a slowly enlarging penile mass associated with phimosis. Conclusions: Prognosis of penile LMS is difficult to ascertain because reported cases are rare. Penile leiomyosarcoma can be classified as superficial or deep based on tumor relation to tunica albuginea. Deep tumors (> 3 cm), high-grade lesions, and tumors with involvement of corpora cavernosa, tend to spread locally and metastasize to distant areas and require more radical surgery with or without postoperative radiation therapy. In contrast, superficial lesions can be treated with local excision only.

5.
BJU Int ; 105(1): 34-6, 2010 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-19583719

RESUMEN

OBJECTIVE: To determine the mechanism for delayed healing of the urinary anastomosis after radical retropubic prostatectomy (RRP). PATIENTS AND METHODS: The volumes of the para-anastomotic haematoma (PHV) and anastomotic extravasation were measured by ultrasonography in 95 men after RRP. The performance characteristics of PHV for predicting urinary extravasation were ascertained and compared with that of postoperative blood loss, measured as the difference between the haematocrit immediately after RRP and that at discharge. RESULTS: The sensitivity and specificity of PHV for predicting urinary extravasation at a threshold of 37 mL was 100% and 96%, respectively. PHV was superior to postoperative blood loss in predicting anastomotic extravasation, as shown by an area under the receiver operating curve of 0.99 vs 0.91, respectively. CONCLUSIONS: Our findings provide compelling evidence that delayed healing of the anastomosis after RRP is due to distraction forces secondary to a pelvic haematoma. The accuracy of PHV as a predictor of anastomotic extravasation suggests that this measurement might replace cystography for assessing anastomotic integrity after RRP.


Asunto(s)
Extravasación de Materiales Terapéuticos y Diagnósticos/etiología , Hematoma/complicaciones , Hemorragia Posoperatoria/etiología , Prostatectomía , Neoplasias de la Próstata/cirugía , Cicatrización de Heridas/fisiología , Anastomosis Quirúrgica , Remoción de Dispositivos , Extravasación de Materiales Terapéuticos y Diagnósticos/diagnóstico por imagen , Hematócrito , Hematoma/patología , Humanos , Masculino , Persona de Mediana Edad , Sensibilidad y Especificidad , Ultrasonografía , Cateterismo Urinario
6.
BJU Int ; 105(8): 1098-101, 2010 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-19849693

RESUMEN

OBJECTIVE: To determine if preoperative variables, including gender, age and tumour size, influence the decision for active surveillance of renal masses, as due to the increasing detection of incidental renal masses within the ageing population there is a need to identify reliable means of selecting patients who require therapy. PATIENTS AND METHODS: We retrospectively identified all renal masses resected at our institution between 1 December 1999, and 1 October 2005. The size of tumour, patient age and gender were compared between those with and without malignancy on final pathology. The influence of these variables in predicting malignancy, high grade, and high stage were assessed by univariate and multivariate analysis using logistic regression models, with a significance level of P < 0.05. Subsets were analysed for the groups of patients with tumours of ≤ 3 or > 3 cm and those aged ≤ 75 or > 75 years. RESULTS: Among 466 of 501 patients with evaluable data, univariate analysis showed that both male gender and increasing size positively predicted malignancy (odds ratio 1.13 and 1.40, respectively), but age, treated as a continuous variable, did not. On multivariate analysis both remained independent predictors of malignancy (odds ratio 1.13 and 1.40, respectively). Size was the only independent predictor of high-stage and high-grade disease on both univariate and multivariate analysis. Among 156 patients with tumours of ≤ 3 cm, on multivariate analysis, male gender was only weakly associated with the risk of malignancy, whereas size remained strongly predictive (odds ratio 1.98, P = 0.076; and 2.16, P = 0.015, respectively). Neither male gender, size nor age increased the risk of high-stage or high-grade disease in this cohort. Patients who were aged > 75 years had a greater risk of high-stage disease than those aged < 75 years (odds ratio 2.64, P = 0.008). On multivariate analysis, age > 75 years remained an independent predictor of malignancy and high-stage, along with size (odds ratio 2.75, P = 0.014; and 1.35, P < 0.001). CONCLUSIONS: Increased size of tumour increases the risk of malignancy and the likelihood of high-stage and high-grade disease. Among patients aged > 75 years there was a higher risk of malignancy and high-stage disease than in those aged ≤ 75 years. As such, the decision for observation should not be based upon age alone, and should be approached with caution in patients aged >75 years, particularly for larger lesions.


Asunto(s)
Carcinoma de Células Renales/terapia , Neoplasias Renales/terapia , Espera Vigilante , Adulto , Factores de Edad , Anciano , Anciano de 80 o más Años , Carcinoma de Células Renales/patología , Femenino , Humanos , Neoplasias Renales/patología , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Factores de Riesgo , Factores Sexuales , Carga Tumoral
7.
J Urol ; 181(5): 2009-17, 2009 May.
Artículo en Inglés | MEDLINE | ID: mdl-19286216

RESUMEN

PURPOSE: We describe the literature base pertaining to adrenalectomy at radical nephrectomy and present a pragmatic approach based on primary tumor and disease characteristics. MATERIALS AND METHODS: Literature searches were performed via the National Center for Biotechnology Information databases using various keywords. Articles that pertained to the concomitant use of adrenalectomy with radical nephrectomy were surveyed. RESULTS: The incidence of solitary, synchronous, ipsilateral adrenal involvement, ie that which is potentially curable with ipsilateral adrenalectomy along with nephrectomy, is much lower than previously thought at 1% to 5%. Evidence to date supports increased size and T stage, multifocality, upper pole location and venous thrombosis as risk factors for adrenal involvement. Cross-sectional imaging is now accurate at demonstrating the absence of adrenal involvement but still carries a significant risk of false-positives. The morbidity of adrenalectomy is minimal except in those patients with metachronous contralateral adrenal metastasis in whom the impact of adrenal insufficiency can be devastating. Disease specific and overall survival of those undergoing radical nephrectomy, with or without adrenalectomy, are similar. The survival of patients with widespread metastatic disease is historically poor regardless of whether adrenalectomy is performed. There is evidence for a survival advantage in patients with isolated adrenal metastasis, although this group comprises no more than 2% of those undergoing surgery for renal tumors. CONCLUSIONS: The apparent benefit of ipsilateral adrenalectomy does not support it as a standard practice in all patients with normal imaging. However, it should be considered in select cases in which there are risk factors for adrenal involvement.


Asunto(s)
Neoplasias de las Glándulas Suprarrenales/secundario , Neoplasias de las Glándulas Suprarrenales/cirugía , Carcinoma de Células Renales/secundario , Carcinoma de Células Renales/cirugía , Neoplasias Renales/cirugía , Recurrencia Local de Neoplasia/mortalidad , Neoplasias de las Glándulas Suprarrenales/mortalidad , Adrenalectomía/métodos , Carcinoma de Células Renales/mortalidad , Terapia Combinada , Diagnóstico por Imagen/métodos , Femenino , Humanos , Neoplasias Renales/mortalidad , Neoplasias Renales/patología , Metástasis Linfática , Masculino , Recurrencia Local de Neoplasia/patología , Estadificación de Neoplasias , Nefrectomía/métodos , Pronóstico , Estudios Retrospectivos , Medición de Riesgo , Análisis de Supervivencia , Factores de Tiempo
8.
J Urol ; 181(6): 2438-43; discussion 2443-5, 2009 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-19371905

RESUMEN

PURPOSE: We evaluated the effect of warm ischemia time on early postoperative renal function following laparoscopic partial nephrectomy. MATERIALS AND METHODS: Of 453 patients who were surgically treated for renal tumors between May 2001 and September 2007, and who were identified in our database 128 underwent laparoscopic partial nephrectomy. Of these 128 patients 101 who were evaluable had complete demographic, operative, preoperative and early postoperative data available. Renal function was estimated using the glomerular filtration rate. Warm ischemia time was stratified into 4 interval groups and also analyzed based on different time cutoffs. Ultimately we also tested the relationship between postoperative renal failure, and preoperative factors and warm ischemia time. RESULTS: Warm ischemia time interval analysis was not significant. However, when analyzing the effect of warm ischemia time cutoffs, patients with warm ischemia time greater than 40 minutes had a significantly greater decrease in the glomerular filtration rate (p = 0.03) and a lower glomerular filtration rate postoperatively. The incidence of renal function impairment was more than 2-fold higher in those with a warm ischemia time of greater than 40 minutes than in the other groups (p = 0.077). Warm ischemia time was significant on univariate analysis when only patients with a preoperative glomerular filtration rate of 60 ml per minute per 1.73 m(2) or greater were analyzed. However, this did not hold as an independent predictor of postoperative renal function impairment on multivariate analysis. The preoperative glomerular filtration rate was the only independent predictor of postoperative renal function impairment. CONCLUSIONS: A warm ischemia time of 40 minutes appears to be an appropriate cutoff, after which a significantly greater decrease in renal function occurs after laparoscopic partial nephrectomy. The preoperative glomerular filtration rate was the only independent predictor of an increased risk of renal insufficiency following laparoscopic partial nephrectomy.


Asunto(s)
Tasa de Filtración Glomerular , Neoplasias Renales/cirugía , Laparoscopía , Nefrectomía/métodos , Isquemia Tibia/métodos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Periodo Posoperatorio , Factores de Tiempo
9.
J Urol ; 182(3): 1091-5, 2009 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-19616809

RESUMEN

PURPOSE: We investigated whether adding the IIF categorization improved the accuracy of Bosniak renal cyst classification, as evidenced by a low rate of progression in IIF lesions and a high rate of malignancy in category III lesions. MATERIALS AND METHODS: We retrospectively reviewed the records of patients with complex renal cysts categorized as a Bosniak IIF or III. Surveillance imaging and pathological outcomes of category IIF cysts were recorded to determine radiological predictors of progression. Pathological outcomes of category III cysts were recorded to determine the malignancy rate. RESULTS: A total of 112 patients met study inclusion criteria, of whom 81 were initially diagnosed with a category IIF cyst and 31 had a Bosniak category III cyst. At a median followup of 15 months 14.8% of Bosniak IIF lesions progressed in complexity with a median time to progression of 11 months (maximum greater than 4 years). There were no differences in tumor or patient characteristics between cysts that progressed and those that remained stable. In the 33 patients with Bosniak III lesions who underwent surgical extirpation the malignancy rate was 81.8%. Most patients had low stage, low grade disease and remained recurrence-free at a median followup of 6 months. CONCLUSIONS: Adding the IIF category has increased the accuracy and clinical impact of the Bosniak categorization system, as evidenced by a low rate of progression in category IIF cysts and an increased rate of malignancy in surgically treated category III lesions compared to those in historical controls.


Asunto(s)
Enfermedades Renales Quísticas/clasificación , Enfermedades Renales Quísticas/patología , Neoplasias Renales/patología , Adulto , Anciano , Anciano de 80 o más Años , Progresión de la Enfermedad , Humanos , Enfermedades Renales Quísticas/cirugía , Neoplasias Renales/cirugía , Persona de Mediana Edad , Estudios Retrospectivos
11.
Clin Genitourin Cancer ; 15(5): 591-597.e1, 2017 10.
Artículo en Inglés | MEDLINE | ID: mdl-28410908

RESUMEN

BACKGROUND: The purpose of the study was to compare utilization and predictors of partial nephrectomy (PN) in the pre- and post-guideline eras. MATERIALS AND METHODS: American Board of Urology certification/recertification operative logs were reviewed from 2003 to 2014. Nephrectomy cases were extracted using Current Procedural Terminology codes. The cases were then stratified according to pre-guidelines (2003-October 2009) and post-guidelines (November 2009-2014). Multivariable logistic regression was used to evaluate patient, surgeon, and practice characteristics as predictors of PN. A general linear model with regression analysis was used to evaluate the change in PN over time relative to the incidence of renal cell carcinoma (RCC). RESULTS: We identified 20,402 and 20,729 nephrectomies in the pre- and post-guidelines eras, respectively. In multivariable analysis, the post-guidelines group was more likely to undergo PN (odds ratio, 1.87; P < .001). The pre- as well as post-guidelines groups had a higher likelihood of undergoing PN with an open approach, higher-volume surgeons, and younger patient age (P < .05). Surgeon subspecialty and US region were no longer significant factors after guidelines publication. Number of PN normalized to the incidence of RCC continued to increase over time (0.14%/y; R2 = 0.77; P < .001). CONCLUSION: Partial nephrectomy in the post-guidelines era is no longer confined to urological subspecialists or certain densely populated US regions. Although rates of PN continue to increase relative to the recently decreasing overall incidence of RCC, the slope has leveled off somewhat. This is likely related to clinical intricacies of the best treatment modality and technologic advances rather than changes related to guidelines publication.


Asunto(s)
Carcinoma de Células Renales/cirugía , Neoplasias Renales/cirugía , Nefrectomía/estadística & datos numéricos , Adulto , Femenino , Adhesión a Directriz , Humanos , Modelos Lineales , Modelos Logísticos , Masculino , Persona de Mediana Edad , Oportunidad Relativa , Guías de Práctica Clínica como Asunto , Análisis de Regresión
12.
Urol Oncol ; 35(11): 662.e17-662.e21, 2017 11.
Artículo en Inglés | MEDLINE | ID: mdl-28781110

RESUMEN

OBJECTIVE: To assess the relationship of race and margin status among patients undergoing robotic partial nephrectomy (RPN) for T1 renal tumors from a contemporary population-based cohort. METHODS: Using the National Cancer Database, we identified patients with localized renal cell carcinoma (RCC) (clinical T1N0M0) who underwent RPN from 2010 to 2013. The primary outcome was positive surgical margins (PSM). Multivariable logistic regression analyses were used to assess the association between race and PSM adjusting for patient clinicopathologic and hospital factors. RESULTS: Among 12,515 patients undergoing RPN in our cohort, 8.3% had PSM (n = 1,045). When compared to white patients undergoing RPN for T1 RCC with PSM (7.9%), we observed a higher proportion of PSM among African American (AA) (10.8%; P = 0.005) and Hispanic/Latino patients (8.8%; P = 0.005), respectively. On multivariable analysis, AA patients had higher odds of PSM compared to white patients (odds ratio = 1.40; P = 0.008). Other factors associated with higher odds of PSM were treatment at nonacademic centers relative to academic centers (10.4% vs. 6.9%; odds ratio = 1.57; P<0.001). CONCLUSIONS: In this contemporary population-based cohort, AA patients undergoing RPN for localized RCC tumors are at higher risk for PSM. These results suggest potential differences in quality of care and patient selection of RPN by race.


Asunto(s)
Carcinoma de Células Renales/cirugía , Neoplasias Renales/cirugía , Nefrectomía/métodos , Procedimientos Quirúrgicos Robotizados/métodos , Negro o Afroamericano/estadística & datos numéricos , Anciano , Carcinoma de Células Renales/etnología , Carcinoma de Células Renales/patología , Estudios de Cohortes , Femenino , Hispánicos o Latinos/estadística & datos numéricos , Humanos , Neoplasias Renales/etnología , Neoplasias Renales/patología , Masculino , Márgenes de Escisión , Persona de Mediana Edad , Estadificación de Neoplasias , Vigilancia de la Población/métodos , Población Blanca/estadística & datos numéricos
13.
Can J Urol ; 13 Suppl 2: 11-7, 2006 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-16672123

RESUMEN

The relationship between obesity and prostate cancer is currently a hotly debated topic, but despite the number of publications devoted to the topic, the actual nature of the relationship remains uncertain. Obesity has been shown to have a direct relationship with the incidence of prostate cancer in a number of studies but an equal number of studies have shown no association. The relationship is further obscured with recent findings that obesity in younger obese men may actually be protective against prostate cancer. Confounding factors include the lack of correlation of body mass index (BMI) as a measure of central obesity and the lack of consistency in timing of BMI measurements, i.e. before or after diagnosis and in young or advanced adulthood. Evidence for increased BMI as a risk factor for prostate cancer is unclear, but less ambiguous is the mounting substantiation that obesity is associated with prognostically worse disease, poorer post-surgical outcomes and increased prostate cancer mortality, irregardless of margin status. From a biologic perspective, one can put forth a number of potential mechanisms by which obesity might promote prostate cancer and/or prostate cancer progression including; low levels of testosterone, increased levels of estrogen, co-existing diabetes or metabolic syndrome, increased circulating insulin-growth factor-one (IGF-1), increased levels of leptin, decreased levels of adiponectin and increased dietary saturated fats. Evidence for the association of these factors with prostate cancer are examined herein. The timing of serum measurements is crucial in elucidating whether these factors have causative influence on prostate cancer or rather are produced by the prostate cancer cells and are better understood as markers of disease. The interaction between obesity and prostate cancer is important to clarify because it will have impact on the prevention, prognostication and treatment of prostate cancer. Future study with careful attention to avoid the methodological pitfalls of the past need be accomplished to bear out the nature of the interaction of obesity and prostate cancer.


Asunto(s)
Obesidad/complicaciones , Neoplasias de la Próstata/etiología , Humanos , Masculino , Factores de Riesgo
14.
J Endourol ; 30(6): 660-4, 2016 06.
Artículo en Inglés | MEDLINE | ID: mdl-26983678

RESUMEN

INTRODUCTION: Intracorporeal suturing is considered to be the most challenging aspect of laparoscopic and robotic surgery. To overcome this problem, barbed self-retaining sutures have been effectively employed in various minimally invasive endourologic surgeries. However, the use of this suture has been recently cautioned for pyeloplasty due to a high failure rate. Our objective was to report our experience using barbed suture during robotic pyeloplasty. METHODS: We retrospectively identified 13 consecutive patients who underwent robotic pyeloplasty with a barbed monofilament (4-0 V-Loc™) suture for the ureteropelvic anastomosis from 2011 to 2014. We compared these patients to 12 consecutive patients who underwent robotic pyeloplasty with a 4-0 nonbarbed suture from 2007 to 2011. We evaluated patient demographics, operative times, preoperative and postoperative symptoms, renal function, and diuretic renograms (DRG). Successful repair was defined as resolution of preoperative symptoms and/or T½ improvement on DRG to less than 20 minutes. RESULTS: The median age was 26 (interquartile range [IQR] 20.7-38) years and 35 (IQR 18.3-44) years for the barbed and nonbarbed suture groups, respectively. In the barbed suture group, preoperative DRG revealed ureteropelvic junction obstruction (UPJO) in 11 patients, equivocal UPJO (T½ 10-20 minutes) in one patient, and no obstruction in one patient. In the nonbarbed group, preoperative DRG revealed UPJO in 10 patients, equivocal UPJO in one patient, and no obstruction in one patient. In the barbed suture group, postoperative DRG was obtained in 11 patients, which showed no obstruction in 10/11 patients with 92% of patients experiencing symptom resolution. Similarly, postoperative DRG was obtained in 11 patients in the nonbarbed group, which showed no obstruction in 10/11 patients with 100% postoperative symptom resolution. CONCLUSIONS: In the largest series reporting use of V-Loc suture for robotic pyeloplasty, the V-Loc suture was safely and effectively used for robotic pyeloplasty repair.


Asunto(s)
Procedimientos Quirúrgicos Robotizados/métodos , Suturas , Uréter/cirugía , Obstrucción Ureteral/cirugía , Adulto , Diuréticos , Femenino , Estudios de Seguimiento , Humanos , Riñón/cirugía , Laparoscopía/métodos , Masculino , Procedimientos Quirúrgicos Mínimamente Invasivos , Tempo Operativo , Periodo Posoperatorio , Procedimientos de Cirugía Plástica , Estudios Retrospectivos , Resultado del Tratamiento , Adulto Joven
16.
Urol Oncol ; 33(3): 112.e15-21, 2015 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-25532471

RESUMEN

OBJECTIVE: To determine whether presurgical sunitinib reduces primary renal cell carcinoma (RCC) size and facilitates partial nephrectomy (PN). METHODS: Data from potential candidates for PN treated with sunitinib with primary RCC in situ were reviewed retrospectively. Primary outcome was reduction in tumor bidirectional area. RESULTS: Included were 72 potential candidates for PN who received sunitinib before definitive renal surgery on 78 kidneys. Median primary tumor size was 7.2 cm (interquartile range [IQR]: 5.3-8.7 cm) before and 5.3 cm (IQR: 4.1-7.5 cm) after sunitinib treatment (P<0.0001), resulting in 32% reduction in tumor bidirectional area (IQR: 14%-46%). Downsizing occurred in 65 tumors (83%), with 15 partial responses (19%). Tumor complexity per R.E.N.A.L. score was reduced in 59%, with median posttreatment score of 9 (IQR: 8-10). Predictors of lesser tumor downsizing included clinical evidence of lymph node metastases (P<0.0001), non-clear cell histology (P = 0.0017), and higher nuclear grade (P = 0.023). Surgery was performed for 68 tumors (87%) and was not delayed in any patient owing to sunitinib toxicity. Grade ≥ 3 surgical complications occurred in 5 patients (7%). PN was performed for 49 kidneys (63%) after sunitinib, including 76% of patients without and 41% with metastatic disease (P = 0.0026). PN was completed in 100%, 86%, 65%, and 60% of localized cT1a, cT1b, cT2, and cT3 tumors, respectively. CONCLUSION: Presurgical sunitinib leads to modest tumor reduction in most primary RCC, and many patients can be subsequently treated with PN with acceptable morbidity and preserved renal function. A randomized trial is required to definitively determine whether presurgical therapy enhances feasibility of PN.


Asunto(s)
Antineoplásicos/uso terapéutico , Carcinoma de Células Renales/tratamiento farmacológico , Carcinoma de Células Renales/cirugía , Indoles/uso terapéutico , Neoplasias Renales/tratamiento farmacológico , Neoplasias Renales/cirugía , Nefrectomía/métodos , Pirroles/uso terapéutico , Anciano , Terapia Combinada/métodos , Supervivencia sin Enfermedad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Sunitinib , Resultado del Tratamiento
17.
Ann N Y Acad Sci ; 957: 78-89, 2002 May.
Artículo en Inglés | MEDLINE | ID: mdl-12074963

RESUMEN

We have shown in previous work that extracts of grape seeds (GSE) and skins, grape juice, and many red wines exhibit endothelium-dependent relaxing (EDR) activity in vitro. This EDR activity involves endothelial nitric oxide (NO) release and subsequent increase in cyclic GMP levels in the vascular smooth muscle cells. The NO/cyclic GMP pathway is known to be involved in many cardiovascular-protective roles. The current study focuses on the isolation and identification of EDR-active compounds (procyanidins) from GSE. Crushed Concord grape seeds were extracted with methanol and the extract was separated into seven fractions (A-G) on a Toyopearl TSK-HW-40 column. EDR-active fractions (D-G) were further separated into 25 individual compound peaks by HPLC, 16 of which were EDR active (threshold for relaxation ranged between less than 0.5 microg/mL and greater than 4 microg/mL). Procyanidin identification was accomplished by electrospray-ion trap mass spectrometry (ES-ITMS), MS/MS, and by tannase treatment and acid thiolysis, followed by HPLC and ES-ITMS of the products. Activity of isolated procyanidins tended to increase with degree of polymerization, epicatechin content, and with galloylation. These EDR-active compounds (many of which also possess antioxidant activity), individually or in the form of wines, juices, or nutritional supplements, may be useful in preventing or treating cardiovascular diseases.


Asunto(s)
Biflavonoides , Catequina/farmacología , Extractos Vegetales/farmacología , Proantocianidinas , Semillas/química , Vasodilatadores/farmacología , Vitis/química , Animales , Aorta/efectos de los fármacos , Fraccionamiento Químico , Cromatografía Líquida de Alta Presión , Endotelio Vascular/efectos de los fármacos , Humanos , Masculino , Ratas , Ratas Sprague-Dawley , Vasodilatación
18.
Urology ; 82(5): 1065-9, 2013 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-24358483

RESUMEN

OBJECTIVE: To investigate gender effects on the type of nephrectomy performed for a stage I renal mass and differences that might account for disparity in treatment patterns according to gender. METHODS: Using a single-institution database, patients who underwent nephrectomy at a tertiary referral center for a localized, solitary tumor, ≤ 7 cm with a normal contralateral kidney were identified. Variables thought to affect selection for type of nephrectomy were compared between male and female patients. Using multivariable logistic regression, the effect of gender on the likelihood of radical vs partial nephrectomy and the likelihood of malignancy were assessed. Renal function outcomes were also compared. RESULTS: No difference between genders was seen in age, race, smoking status, body mass index, tumor size, RENAL score or operating surgeon. Only Charlson index and preoperative creatinine significantly differed with women having a more favorable comorbidity profile (Charlson >1 in 38% vs 50%; P = .027) and lower mean preoperative creatinine (0.09 ± 0.3 vs 1.1 ± 0.3; P <.001). Despite lower creatinine, women had inferior preoperative renal function with a mean estimated glomerular filtration rate of 71.4 ± 21 vs 78.9 ± 21 mL/min/1.73 m2 in men (P <.001). Multivariable analysis indicated that female patients were 2.5 times more likely to undergo radical nephrectomy compared with their male counterparts (P = .022). Women were less likely to have malignancy (odds ratio male gender 2.50; P = .013). CONCLUSION: Women are more likely than men to undergo radical vs partial excision of a localized renal mass, despite less comorbid burden, inferior renal function, and increased likelihood of benign disease.


Asunto(s)
Disparidades en Atención de Salud , Neoplasias Renales/cirugía , Nefrectomía/métodos , Anciano , Índice de Masa Corporal , Comorbilidad , Creatinina/orina , Toma de Decisiones , Femenino , Tasa de Filtración Glomerular , Humanos , Enfermedades Renales/epidemiología , Enfermedades Renales/cirugía , Neoplasias Renales/epidemiología , Masculino , Persona de Mediana Edad , Análisis Multivariante , Análisis de Regresión , Factores Sexuales , Resultado del Tratamiento
19.
Urology ; 82(4): 807-12, 2013 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-23910088

RESUMEN

OBJECTIVE: To assess the treatment recommendations from a nationally representative sample of radiation oncologists and urologists on adjuvant radiotherapy for patients with pathologically advanced prostate cancer after radical prostatectomy. METHODS: From a random sample of 1422 physicians (n = 711 radiation oncologists; n = 711 urologists) in the American Medical Association Masterfile, a mail survey queried treatment recommendations for adjuvant radiotherapy that varied by the following pathologic features: extraprostatic extension (pT3a) vs seminal vesicle invasion (pT3b), Gleason 7 vs Gleason 8-10, and margin negative (MN) vs margin positive (MP). Pearson chi-square and multivariable logistic regression were used to test for differences in treatment recommendations by physician specialty. RESULTS: Response rates for radiation oncologists and urologists were similar (44% vs 46%; P = .42). Radiation oncologists were more likely to recommend adjuvant radiotherapy than urologists for all the varying pathologic scenarios from pT3a, Gleason 7, and MN (42.5% vs 9.7%; adjusted odds ratio [OR]: 7.82, P <.001) to pT3b, Gleason 8-10, and MP disease (94.5% vs 89.1%, adjusted OR: 2.46, P <.001). Compared with radiation oncologists, urologists were more likely to recommend salvage radiotherapy pT3a, Gleason 7, and MN (90.3% vs 57.7%; adjusted OR: 7.72, P <.001) to pT3b, Gleason 8-10, and MP disease (10.9% vs 5.5%; adjusted OR: 2.22, P <.001). CONCLUSION: In this national survey, radiation oncologists and urologists have markedly different treatment recommendations for adjuvant and salvage radiotherapy. Patients with adverse pathologic features after radical prostatectomy should consult with both a urologist and radiation oncologist to hear a diversity of opinions to make the most informed decision possible.


Asunto(s)
Pautas de la Práctica en Medicina , Neoplasias de la Próstata/radioterapia , Oncología por Radiación , Urología , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Guías de Práctica Clínica como Asunto , Prostatectomía , Neoplasias de la Próstata/cirugía , Radioterapia Adyuvante , Factores de Riesgo
20.
Urol Pract ; 4(5): 417, 2017 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-37300120
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