Publications by authors named "Roberto De Castro"

Article Synopsis
  • True hermaphroditism is a rare disorder characterized by the coexistence of both testicular and ovarian tissues in an individual, making up less than 5% of all disorders of sex development.
  • The case study highlights a patient with two genetic mutations linked to true hermaphroditism, who also shows symptoms of Kallmann syndrome, which includes hypogonadotropic hypogonadism and anosmia due to hormone deficiency.
  • This case is significant as it documents the first known instance of a 46 XX true hermaphrodite with hypogonadotropic hypogonadism and digenic inheritance related to Kallmann syndrome.
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This review discusses issues and concerns in the management of aphallia, updating status of a post-pubertal individual who required further surgery after having initial surgery for aphallia as an infant. Through this case, which discusses an 18-year-old young adult who had penile agenesis, who desired further phalloplasty involving glanuloplasty and implantation of an erectile device, we highlight the importance of periodic evaluation and close follow up. Surgery during infancy or early childhood to create a penis is important for gender development in a boy, especially if there were functional testes during fetal life, even if this surgery would only be the first stage.

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Glanders is an infectious zoonosis caused by Burkholderia (B.) mallei that mainly affects equids. The objective of this work was to provide additional knowledge on the diversity of the strains circulating in Brazil.

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Introduction: From 2000 to 2019, the De Castro's neo-phalloplasty was used in 47 patients with congenital and acquired penile loss.

Purpose: Herein, the technical aspects of penile reconstruction and the outcomes in 17 children and adolescents treated for total or sub-total acquired penile loss are reported.

Material And Methods: The median age at the time of injury was 3 months (range: 2 days-15 years).

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Introduction: We present a different salvage procedure for penile prosthesis implantation in a De Castro neophallus.

Methods: A patient with congenital aphallia had been operated at the age of 11. Ten years later he had two non successful attempts of prosthesis implantation.

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A technique to image ion pairs in solution is reported. We investigated structural and dynamic properties of ion-pair distributions deposited on highly oriented pyrolytic graphite (HOPG) surfaces in electrolyte solutions. Atomic force microscopy images of HOPG immersed in NaCl and KCl solutions display regular arrangements on top of the hexagonal carbon rings forming the HOPG atomic structure.

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Excess proton structures in water remain unclear. The motion and nature of excess protons in water were probed using a supported water bridge structure in electric field () with an intensity of ∼10 V/m. The experimental setup generated protons that exhibit a long lifetime.

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Objective: Aphallia is a rare penile congenital abnormality. The aim of this systematic review was to assess all available literature on neophalloplasty in infancy with an interest in technical alternatives and clinical outcome.

Materials And Methods: We performed a Pubmed search using the terms: neophalloplasty, neophallus, and phalloplasty, and selected articles that presented technical alternatives for penile construction in cases of penile dysgenesis, especially aphallia in children and/or adolescents.

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Equine Infectious Anemia (EIA) is a persistent lentivirus infection of horses which causes a chronic clinical condition with worldwide importance in veterinary medicine. The p26 protein is usually prepared for use as an antigen in serological tests for EIA diagnosis since it is a well-conserved gene sequence and very immunogenic. In view of the ability of yeast to make post-translational modifications of proteins, this study was carried out to allow Pichia pastoris to be used for the expression of a synthetic codon-optimized EIAV p26 gene.

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Objective: New concepts in ambiguous genitalia have questioned the strategy of female gender reassignment in cases of penile agenesis. Hence, we present a video of the construction of a phallus according to the De Castro technique as an alternative approach for this devastating condition.

Methods: A 12-year-old boy with congenital penile agenesis and posterior urethra emerging in the distal rectum was selected.

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Purpose: Surgical management of the high urogenital sinus remains challenging. The anterior sagittal transrectal approach provides optimal exposure, facilitates vaginal dissection and separation from the urethra, and allows reconstruction of the bladder neck musculature. In this study we report our initial experience with this technique.

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Background And Objectives: The knowledge of anesthesiologists of specific aspects of patients with rare syndromes is a growing need since those patients are increasingly taken to the operating room. The objective of this report was to describe a case of latex allergy in a patient with Kabuki Syndrome, whose aspects have not been completely explained, alerting anesthesiologists for the possibility of this association.

Case Report: This is an 11 years old patient with the diagnosis of Kabuki syndrome, admitted for removal of soft tissue lesions.

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Purpose: Retrograde ureteral access after cross-trigonal ureteral reimplantation can be challenging. We present our experience with percutaneous retrograde ureteral catheterization, status post cross-trigonal ureteral reimplantation.

Materials And Methods: We evaluated all patients who underwent attempted percutaneous retrograde ureteral catheterization after cross-trigonal ureteral reimplantation.

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Objective: To evaluate, in an experimental study in rabbits, a new model of neophalloplasty based on two lower abdominal skin flaps and ventral buccal mucosa graft for planned two-stage urethroplasty procedure.

Material And Methods: Sixteen rabbits were operated and divided into four equal groups which were sacrificed at 2, 4, 8 and 12 weeks. The inflammatory pattern, presence of sub-epithelial fibrosis and epithelial changes in the grafted area were evaluated histologically.

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The seroprevalence of caprine arthritis-encephalitis virus (CAEV) in the Cariri Region of Paraíba State, Brazil, was determined in 60 goat herds using the agar gel immunodiffusion test. The overall seroprevalence was 8.2%, with seropositivity in 21/60 (35%) herds and 13/15 (86.

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Purpose: Female gender has been assigned to 46,XY newborns affected by aphallia, possibly resulting in subsequent gender dysphoria. Prenatal and postnatal effects of the androgens on the brain and sexual orientation cannot be modified later. Therefore, patients affected by aphallia should be raised as males.

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Purpose: The nephropathy associated with vesicoureteral reflux (VUR) is one of the leading causes of chronic renal failure (CRF) in children. We describe the clinical course of the disease based on information available in the ItalKid Project database, and analyze the predictive value of baseline renal function, age at VUR diagnosis and urinary protein excretion in relation to the risk of progressive renal failure.

Materials And Methods: As of December 31, 2001 the registry included a total of 343 patients (261 males) with a diagnosis of primary VUR, which was the leading single cause of CRF, accounting for 25.

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Purpose: We report a 9-year experience with successful treatment of patients with vaginal atresia at a missionary hospital with decreased facilities in Bangladesh.

Materials And Methods: From 1995 to 2002, 20 patients 10 to 29 years old (average age 18.4) with Mayer-Rokitansky-Kuster-Hauser syndrome underwent total vaginal replacement.

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