Impact of cyclophosphamide and etoposide on outcome of clear cell sarcoma of the kidney treated on the National Wilms Tumor Study-5 (NWTS-5).

Purpose: To improve the event-free survival (EFS) and overall survival (OS) for patients with clear cell sarcoma of the kidney (CCSK) by incorporating cyclophosphamide and etoposide into treatment on National Wilms Tumor Study (NWTS)-5.

Patients And Methods: Patients less than 16 years of age with a centrally confirmed pathological diagnosis of CCSK were eligible for treatment on this prospective single-arm study conducted between August 1995 and June 2002. Staging consisted of CT scans of chest, abdomen, pelvis, bone scan, skeletal survey, and CT or MRI of the head.

Results of the First Prospective Multi-institutional Treatment Study in Children With Bilateral Wilms Tumor (AREN0534): A Report From the Children's Oncology Group.

Objective: The Children's Oncology Group study AREN0534 aimed to improve event-free survival (EFS) and overall survival (OS) while preserving renal tissue by intensifying preoperative chemotherapy, completing definitive surgery by 12 weeks from diagnosis, and modifying postoperative chemotherapy based on histologic response.

Background: No prospective therapeutic clinic trials in children with bilateral Wilms tumors (BWT) exist. Historical outcomes for this group were poor and often involved prolonged chemotherapy; on NWTS-5, 4-year EFS for all children with BWT was 56%.

Patterns of Performance of Oncologic Surgery by North American Pediatric Urologists: A Report from the Pediatric Urologic Oncology Working Group of the Society for Pediatric Urology.

Purpose: Objective data on patterns of oncology practice among pediatric urologists are lacking. We reviewed surgical case logs submitted to the American Board of Urology by those self-reporting as pediatric urologists. We hypothesized that logs would reveal a low oncology volume (fewer than 5 cases) and identify orchiectomy as the most common oncology cases, and that less than 25% of logs would show nephrectomy for renal tumor.

A Society for Pediatric Urology Workforce Survey on the Current Perceptions of Oncology Care by Pediatric Urologists: A Report from the Pediatric Urologic Oncology Working Group of the Society for Pediatric Urology.

Purpose: Data are lacking on the current perception of oncology care among pediatric urologists. Thus, we developed, pilot tested and administered a survey on this topic to SPU (Society for Pediatric Urology) members.

Materials And Methods: Approval for this proposal was granted by SPU leadership prior to developing or distributing the survey instrument.

Outcome of patients with Stage II/favorable histology Wilms tumor with and without local tumor spill: a report from the National Wilms Tumor Study Group.

Background: Intra-operative tumor spill increases the risk of local recurrence of Wilms tumor, and adversely impacts relapse-free (RFS) and overall survival (OS) rates.

Methods: Surgical checklists, operative notes, institutional pathology reports, central pathology review and flow sheets of 602 patients registered between August 1986 and September 1994 on National Wilms Tumor Study-4 as randomized, followed or switched and coded as Final Stage II, favorable histology (FH) were reviewed. RFS and OS were estimated using the Kaplan-Meier method.

Is adrenalectomy necessary during unilateral nephrectomy for Wilms Tumor? A report from the Children's Oncology Group.

Purpose: To determine whether performing adrenalectomy at the time of nephrectomy for unilateral Wilms tumor impacts clinical outcome.

Methods: We reviewed information on all patients enrolled on National Wilms Tumor Study-4 and -5. Data were abstracted on patient demographics, tumor characteristics, surgical and pathologic status of the adrenal gland, and patient outcomes.

Clinicopathologic findings predictive of relapse in children with stage III favorable-histology Wilms tumor.

Purpose: Stage III designation in NWTS-5 (National Wilms Tumor Study-5) was determined by four pathologic criteria: positive lymph nodes (LNs), peritoneal implants, residual disease, and tumor rupture. The objective of this study was to determine the prognostic significance of each of the stage III criteria.

Patients And Methods: Children with stage III Wilms tumor (WT) treated in NWTS-5 were assessed for event-free (EFS) and overall survival (OS).

Primary nephrectomy and intraoperative tumor spill: report from the Children's Oncology Group (COG) renal tumors committee.

Purpose: Initial Children's Oncology Group (COG) management for Wilms' tumor (WT) consists of primary nephroureterectomy with lymph node sampling. While this provides accurate staging to define further treatment, it may result in intraoperative spill (IOS), which is associated with higher recurrence rates and therefore requires more intensive therapy. The purpose of this study is to determine current rates and identify factors which may predispose a patient to IOS.

Paediatric genitourinary cancers and late effects of treatment.

The most common childhood genitourinary cancers are Wilms tumour, rhabdomyosarcoma and germ cell tumour (GCT). Long-term survival rates for patients with these tumours are generally excellent, ranging from 80% to 100%. However, the high cure rates have highlighted the need to minimize the long-term complications of treatments (referred to as 'late effects'), which can be caused by the three treatment modalities used to treat genitourinary tumours: surgery, chemotherapy and radiation therapy.

Pediatric urologic oncology.

This article reviews common pediatric urologic cancers involving the genitourinary system. Rhabdomyosarcoma may occur in the bladder, prostate, paratesticular regions, vagina, or uterus. Some of these locations, such as the paratesticular region, have a more favorable outcome.

Lymph node involvement in Wilms tumor: results from National Wilms Tumor Studies 4 and 5.

Purpose: The aim of the study was to determine the prognostic impact of lymph node (LN) involvement and sampling in patients with Wilms tumor (WT) and the minimum number of LNs needed for accurate staging.

Methods: We reviewed all patients with unilateral, nonmetastatic WT enrolled in the National Wilms Tumor Study 4 or 5. Data were abstracted on patient demographics, tumor histology, staging, number of LNs sampled, and disease-specific and overall patient outcomes.

Treatments and outcomes for end-stage renal disease following Wilms tumor.

Background: Little is known about treatment outcomes for children who have end-stage renal disease (ESRD) after treatment for Wilms tumor (WT).

Methods: Time-to-transplant, graft failure, and survival outcomes were examined for 173 children enrolled on the National Wilms Tumor Study who developed ESRD.

Results: Fifty-five patients whose ESRD resulted from progressive bilateral WT (PBWT) experienced high early mortality from WT that limited their opportunity for transplant (47% at 5 years) and survival (44% at 10 years) in comparison to population controls.

Do chief resident scores on the in-service examination predict their performance on the American Board of Urology Qualifying Examination?

Purpose: The American Urological Association In-Service Examination and the American Board of Urology Qualifying Examination are written multiple choice tests that cover all domains in urology. We investigated whether In-Service Examination performance could identify chief residents who scored in the lowest quartile on the Qualifying Examination.

Materials And Methods: All urology chief residents in the United States and Canada in 2008 and 2009 were eligible to participate in this study.

Risk factors for end stage renal disease in non-WT1-syndromic Wilms tumor.

Purpose: We assessed risk factors for end stage renal disease in patients with Wilms tumor without known WT1 related syndromes. We hypothesized that patients with characteristics suggestive of a WT1 etiology (early onset, stromal predominant histology, intralobar nephrogenic rests) would have a higher risk of end stage renal disease due to chronic renal failure. We predicted a high risk of end stage renal disease due to progressive bilateral Wilms tumor in patients with metachronous bilateral disease.

The management of synchronous bilateral Wilms tumor: a report from the National Wilms Tumor Study Group.

Objective: To provide guidelines for future trials, we reviewed the outcomes of children with synchronous bilateral Wilms tumors (BWT) treated on National Wilms Tumor Study-4 (NWTS-4).

Methods: NWTS-4 enrolled 3335 patients including 188 patients with BWT (5.6%).

Online spaced education generates transfer and improves long-term retention of diagnostic skills: a randomized controlled trial.

Background: Retention of learning from surgical training is often limited, especially if the knowledge and skills are used infrequently. Using histopathology diagnostic skills as an experimental system, we compared knowledge transfer and retention between bolus Web-based teaching (WBT) modules and online spaced education, a novel email-based method of online education founded on the spacing effect.

Study Design: All US urology residents were eligible to participate.

Neonatal orchitis mimicking cystic dysplasia of the testis.

Neonatal orchitis is an extremely rare disease, usually related to a congenital genitourinary anomaly. We present a 36 weeks' gestation infant who presented at 3 days old with a firm and enlarged right testicle. Testicular US revealed a heterogeneous right testicle with numerous cystic spaces as well as decreased testicular blood flow.

Long-term outcomes for infants with very low risk Wilms tumor treated with surgery alone in National Wilms Tumor Study-5.

Objective: To determine the event-free survival (EFS) and overall survival (OS) of children with very low risk Wilms tumor (VLRWT) treated with surgery only.

Background: Previous studies suggested that postoperative chemotherapy had not improved the prognosis of children with VLRWT. A total of 77 children <24 months of age with small (<550 g) Stage I favorable histology Wilms tumors were treated with surgery only.

Hepatic metastasis at diagnosis in patients with Wilms tumor is not an independent adverse prognostic factor for stage IV Wilms tumor: a report from the Children's Oncology Group/National Wilms Tumor Study Group.

Objective: To determine event free survival (EFS) of children with Wilms tumor (WT) and metastatic liver disease at diagnosis.

Summary And Background Data: We reviewed patients with stage IV Wilms tumor treated on National Wilms Tumor Study 4 and 5 to ascertain if they have a worse prognosis than other Stage IV disease.

Methods: A total of 742 patients (pts) with stage IV disease were assessed for EFS (95% confidence interval [CI]) at 5 years after diagnosis.