Publications by authors named "Francisco T Denes"

Article Synopsis
  • - Hydrocolpos is a rare condition where the vagina becomes cystically dilated, often due to issues like an imperforate hymen or vaginal atresia, and can also relate to genetic disorders like Bardet-Biedl syndrome (BBS).
  • - A specific case involving neonatal hydrocolpos linked to BBS was studied, revealing a novel mutation in the BBS10 gene, highlighting the need for genetic testing in similar cases.
  • - It’s crucial for pediatric urologists to consider genetic conditions like BBS in neonates with hydrocolpos, as these can lead to serious complications like kidney issues and obesity.
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Background: Prune belly syndrome (PBS) is characterized by the triad of abdominal flaccidity, bilateral undescended testicles and genitourinary tract anomalies. A variable spectrum of abdominal wall laxity is observed in PBS. We present the first case of a novel technique using a minimally invasive abdominoplasty to specifically address patients with localized abdominal wall weakness in PBS.

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Pediatric adrenocortical tumors (PACTs) represent rare causes of malignancies. However, the south/southeast regions of Brazil are known to have a high incidence of PACTs because of the founder effect associated with a germline pathogenic variant of tumor suppressor gene TP53. We aimed to retrospectively analyze the types of variables among hormone production, radiological imaging, tumor staging, histological and genetic features that were associated with the occurrence of malignancy in 95 patients (71% females) with PACTs from a unique center.

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Background: Differences of sex development (DSD) is a term used for conditions in which the chromosomal, gonadal or phenotypical sex is atypical. 46,XY DSD patients frequently present undervirilized external genitalia. The expression of different miRNAs in many organs of the male genital system has been reported, and these miRNAs have been associated with testicular function and its disorders, but no description has been related to DSD conditions.

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Introduction: Aphallia is a rare congenital disorder pertaining to genotypic males. Early surgical creation of a neophallus is recommended to reinforce the child's male gender-identity, favoring proper psychosexual development. Modern microsurgical techniques used to create a neophallus in adults are not recommended in children due to the invasiveness and complexity of the procedures, along with high complication rates.

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Unlabelled: A major challenge in the management of ureteropelvic junction obstruction (UPJO) is the selection of patients who would benefit from surgical treatment. Tissue inhibitor metalloproteinase-2 (TIMP-2) and insulin-like growth factor-binding protein 7 (IGFBP7) indicate renal cell stress and are associated with cell cycle arrest. The [TIMP-2] [IGFBP7] ratio (Nephrocheck®) has been recently applied in patients in intensive care units patients to predict the development of acute kidney injury.

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Prune belly syndrome (PBS) is characterized by the triad of abdominal flaccidity, a variable degree of urinary tract involvement and cryptorchidism. Most cases of PBS are sporadic and have a normal karyotype, with 95% patients being male. In the last decade, mutations in known genes that regulate embryonic genitourinary myogenesis have been identified and with increasing knowledge of these critical genes involved in bladder maldevelopment, advances can be made in genetic counseling.

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Introduction: Ureteropelvic junction obstruction (UPJO) particularly represents a challenge in regard to management, as not all hydronephrosis (HN) represent a kidney-damaging state. Urinary biomarkers have been proposed as noninvasive tools. Extracellular matrix (ECM) proteins are associated with tissue fibrosis in the setting of UPJO and is poorly explored.

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Introduction: Symptomatic duplex kidneys usually present with recurrent urinary tract infection due to ureteral obstruction (megaureter, ureterocele or ectopic ureter) and/or vesicoureteral reflux. Upper-pole nephrectomy is a widely accepted procedure to correct symptomatic duplex systems with poor functioning moieties, also known as upper or proximal approach. The distal ureteral stump syndrome (DUSS) can be a late complication of this approach.

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Objective: Few and conflicting reports have characterized the genetics of paediatric pheochromocytomas and paragangliomas (PPGLs). This study aimed to investigate the clinical and genetic features of Brazilian children with PPGL.

Patients And Methods: This study included 25 children (52% girls) with PPGL.

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Introduction: The benefits of laparoscopic total nephrectomy in pediatric patients are well established. Traditional Ports placement (TPP) still follows Clayman's classic description: except for the umbilical scar, the other laparoscopic scars are exposed in the abdomen. Advances in robotic surgery permitted the development of HidES (hidden incision endoscopic surgery) technique, to obtain a better final cosmetic aspect with the scars located intraumbilically and in the hypogastric region, in an area easily hidden by underwear.

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Aim: The aim of this study is to present our experience in the management of hormonally active adrenal tumors in children.

Material And Methods: We did a retrospective chart review of all children with hormonally active adrenal tumors evaluated at the endocrinology clinic and operated at our institution between 1983 and 2019.

Results: There were 75 patients included in the study, 58 with adrenocortical tumors (ACTs) and 17 with pheochromocytomas (PCCs).

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Introduction: Prune Perineum Syndrome (PPS) is rare, with only three cases described in the literature. Treatment requires abdominal and pelvic surgeries. Our goal is to provide a video with steps of the surgical corrections of this syndrome.

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Objective: To gain insight into the causes of infertility in Prune Belly Syndrome (PBS) by evaluating reproductive system anatomy and gonadal function in a cohort of postpubertal PBS patients.

Methods: We contacted all PBS patients 14 years old or older treated and followed at our institution. Age at orchiopexy, type of orchiopexy (with or without ligation of gonadal vessels), testicular volumes and positions were evaluated.

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Article Synopsis
  • Adrenocortical cancer is a rare and aggressive cancer, and understanding its molecular mechanisms is crucial for improving treatment options.
  • This study focused on pediatric patients with adrenocortical neoplasia in southern Brazil, particularly looking at DNA mismatch repair (MMR) gene alterations found in Lynch syndrome.
  • The research found that while MMR protein expression was normal in all tumors tested, 8.57% of patients carried a specific mutation associated with higher genetic risk for Lynch syndrome, suggesting that these pediatric patients may require closer genetic monitoring.
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Differences/disorders of sex development (DSD) are a heterogeneous group of congenital conditions that result in discordance between an individual's sex chromosomes, gonads, and/or anatomic sex. Advances in the clinical care of patients and families affected by 46,XY DSD have been achieved since publication of the original Consensus meeting in 2006. The aims of this paper are to review what is known about morbidity and mortality, diagnostic tools and timing, sex of rearing, endocrine and surgical treatment, fertility and sexual function, and quality of life in people with 46,XY DSD.

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Background And Objective: The optimal treatment for children born with exstrophy-epispadia complex is still a matter of debate. We demonstrate the Single-Stage Abdominoplasty using Groin Flap technique to close the abdominal wall of children with classic bladder exstrophy (CBE) without osteotomy neither radical soft tissue mobilization. Advantages over current techniques are less risk of penile tissue loss and avoidance of osteotomies.

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Introduction: Ureteropelvic junction obstruction (UPJO) is a common congenital anomaly leading to varying degrees of hydronephrosis (HN), ranging from no apparent effect on the renal function to atrophy. Evaluation of these children is based on Diuretic Renal Scintigraphy (DRS) and Ultrasonography (US). Recent studies have suggested that new parameters of conventional and color Doppler ultrasonography (CDUS) may be useful in discriminating which kidneys are obstructed.

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Article Synopsis
  • The study evaluated the effectiveness of laparoscopic pyeloplasty in children with complex ureteropelvic junction obstruction (UPJO), focusing on those with atypical kidney anatomy compared to those with normal anatomy.
  • Researchers reviewed medical records of 82 children who underwent the procedure, separating them into two groups: normal anatomy (group 1) and complex cases (group 2). Key metrics like operative time, complications, and outcomes were analyzed.
  • Results showed similar success rates and complication rates between the two groups, concluding that laparoscopic pyeloplasty is a safe and effective option for treating UPJO even in cases with urinary tract anomalies.
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Introduction: A high cure rate for Wilms' tumor has been achieved using a multidisciplinary approach. The natural step forward is to offer the benefits of a minimally invasive technique for surgery, which is an obligatory part of treatment. Nevertheless, some authors resist using videolaparoscopic radical nephrectomy (VRN) because of concerns about reducing the cure index.

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Introduction: Urethral duplication is rare. Characterized by the presence of two urethral channels. This anomaly presents a great variety of clinical findings that depend on the type of duplication that often is associated with other anomalies.

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Purpose: Genital reconstruction in female patients with virilizing congenital adrenal hyperplasia (CAH) is very challenging. Our aim was to evaluate the techniques employed to treat complications after failure of primary urogenital sinus (UGS) surgery, as well as the result of these reoperations.

Patients And Methods: Twenty girls with virilizing CAH who were previously submitted to genitoplasty in our service and elsewhere had recurrent UGS stenosis and vaginal introitus stenosis that required surgical treatment.

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