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BACKGROUND: Low-grade vesicoureteral-reflux (VUR) are rather treated by endoscopic injection, whereas open or laparoscopic procedures are mainly performed for high-grade VURs. Management of intermediate grades is controversial and no study focused on grade III to date. This study aims to compare the results of open, laparoscopic, and endoscopic approaches in children with grade III VUR. METHODS: A multicenter comparative retrospective study included children with grade III VUR operated for febrile urinary tract infections (UTIs) from 2007 to 2016. Children without UTI, with reflux of other grades, neurological bladder, duplex system, posterior urethral valves, and bladder exstrophy were excluded. Success was defined as no recurrence of febrile UTI and was presented as event-free survival curves. RESULTS: Out of 806 children operated of VUR, 171 met the inclusion criteria (114 females). Seventy-seven children (45%) underwent an open Cohen procedure, 35 (21%) a laparoscopic Lich-Gregoir and 59 (34%) a submucosal endoscopic injection according to the centers' preference. The mean follow-up was 64 months (24-132). Groups were not different for age, sex, and circumcision status. Compared to Cohen procedure, recurrences of febrile UTI were more frequent after laparoscopic treatment (p = 0,02, 8/35) and endoscopic treatment (p = 0.001, 16/59). Redosurgery was also more frequent after laparoscopy (n = 2) and endoscopic injection (n = 14) than after open surgery (n = 0, p < 0.001). CONCLUSION: Recurrent febrile UTIs and redosurgery are more frequent after endoscopic and laparoscopic procedures in grade III VUR than open reimplantation. Whether the lower morbidity of laparoscopic or endoscopic approaches balances the risk of recurrent febrile UTI remains to be determined for intermediate grade reflux.
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Laparoscopia , Refluxo Vesicoureteral , Masculino , Feminino , Criança , Humanos , Refluxo Vesicoureteral/cirurgia , Estudos Retrospectivos , Bexiga UrináriaRESUMO
PURPOSE: We report the natural history and prognosis of tumors after augmentation enterocystoplasty, with a molecular analysis using an oncogene panel to search for potential targeted therapies. MATERIALS AND METHODS: This multicenter, nationwide, retrospective study included 16 patients. A panel of 21 clinically relevant oncogenes was tested on archival tumor specimens using next-generation sequencing. Survival rate was the main clinical outcome and sequences were compared to the reference genome for the genetic outcome. RESULTS: Augmentation enterocystoplasties were performed mainly for congenital neurogenic bladder and bladder exstrophy at a median patient age of 17 years (range 4 months to 45 years). Most of the malignancies were diagnosed because of clinical manifestations, with a median latency period of 20 years. Adenocarcinomas were mainly found after gastrocystoplasty, whereas urothelial cell carcinomas were typically found after colocystoplasty. Of the 16 patients 13 were diagnosed at an advanced stage of the disease (positive lymph nodes in 7, distant metastases in 6). The overall 1-year survival rate was 56%. Only 3 patients remained disease-free at a median followup of 70 months. Of the 9 tumors with analyzable DNA 4 were wild-type and 5 harbored missense mutations (KIT-p.Pro573Ser, PDGFRA-p.Glu587Lys, KRAS-p.Gly12Asp, ERBB4p.Arg484Lys, CTNNB1-p.Ser37Phe and p.Ser47Asn). CONCLUSIONS: Malignancy after augmentation enterocystoplasty is diagnosed late with frequent metastases and a very low 1-year survival rate. More than half the tested samples harbored missense mutations in oncogenes accessible to targeted therapies. An international collaboration to enlarge the genetic panel analysis of these tumors may offer new therapeutic hope to patients.
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Oncogenes/genética , Neoplasias da Bexiga Urinária/mortalidade , Bexiga Urinária/cirurgia , Procedimentos Cirúrgicos Urológicos , Adenocarcinoma/mortalidade , Adenocarcinoma/patologia , Adolescente , Adulto , Extrofia Vesical/cirurgia , Carcinoma de Células de Transição/mortalidade , Carcinoma de Células de Transição/patologia , Criança , Análise Mutacional de DNA , Feminino , França , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Masculino , Mutação de Sentido Incorreto , Metástase Neoplásica , Prognóstico , Estudos Retrospectivos , Taxa de Sobrevida , Neoplasias da Bexiga Urinária/patologia , Bexiga Urinaria Neurogênica/congênito , Bexiga Urinaria Neurogênica/cirurgia , Adulto JovemAssuntos
Síndrome de Resistência a Andrógenos/epidemiologia , Dietilestilbestrol/toxicidade , Disruptores Endócrinos/toxicidade , Relação entre Gerações , Adulto , Criança , Pré-Escolar , Feminino , França/epidemiologia , Humanos , Hipospadia/epidemiologia , Lactente , Recém-Nascido , Masculino , Pessoa de Meia-Idade , Fenótipo , Gravidez , Efeitos Tardios da Exposição Pré-Natal/induzido quimicamente , Efeitos Tardios da Exposição Pré-Natal/epidemiologiaRESUMO
Although hyperandrogenism is a frequent cause of consultation in adolescent girls, more severe forms with virilization must lead to suspicion of an adrenal or ovarian tumor. However, they may also reveal a 46,XY disorder of sexual development (DSD). Here, we describe four adolescent girls referred for pubertal virilization and in whom we diagnosed a 46,XY DSD. We performed gene mutation screening by Sanger sequencing (all patients) and by next-generation sequencing (NGS) in patient #4. We identified new heterozygous NR5A1 gene variants in patients #1 and #2 and a homozygous SRD5A2 gene deletion in patient #3. Patient #4 received a diagnosis of complete androgen insensitivity in childhood; however, due the unusual pubertal virilization, we completed the gene analysis by NGS that revealed two heterozygous HSD17B3 variants. This work underlines the importance of considering the hypothesis of 46,XY DSD in adolescent girls with unexplained virilization at puberty.
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In this short educational communication the ESPU Research Committee presents the role of non-coding RNA and how these can affect gene expression. In particular we discuss the role of microRNA on post transcriptional changes and how these may cause pathological conditions within Pediatric Urology and how microRNA could be useful in future clinical practice.
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MicroRNAs , Criança , Humanos , MicroRNAs/genética , MicroRNAs/metabolismo , Expressão GênicaRESUMO
AIMS: To analyze the results of treatment of major renal injuries according imaging data in order to determine their function after follow-up. PATIENTS AND METHODS: This is a retrospective study of 22 cases of fracture of the kidney (grade V) in two pediatric surgical services that were reviewed over a period of 16 years. After initial conservative treatment in 19 patients (86.5%), a scan and/or Uro-MRI were realized in all patients in monitoring evolving. Three children with vascular injury were treated by interventional radiology. The morphology and functional evolution of the injured kidney were determined. RESULTS: A DMSA scan investigation was performed in 21 patients (95.5%) associated with Uro-MRI in two cases; one patient was only explored with Uro-MRI. A complete restitution of the renal parenchyma was confirmed in 10 children (45.5%), we noted an atrophy of the upper pole in 30%, a lower pole atrophy in 4.5%, two complete renal atrophy in 9%. An urinoma was present in six patients (27%) that required drainage in five cases and declined during the surveillance in one case. Normal function of the injured kidney was noticed in half of grade V (11 of 22 patients) with a mean follow-up of 19 months. None of our patients did present hypertension. CONCLUSION: Non-operative conservative treatment in severe renal trauma was efficient, morphological and functional sequelae were present in 50% on scintigraphy and/or Uro-MRI.
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Rim/lesões , Avaliação de Resultados em Cuidados de Saúde , Atrofia/etiologia , Atrofia/terapia , Criança , Diagnóstico por Imagem , Drenagem , Feminino , Seguimentos , Hematoma/etiologia , Hematoma/terapia , Humanos , Escala de Gravidade do Ferimento , Rim/patologia , Rim/cirurgia , Masculino , Nefrectomia , Radiografia Intervencionista , Estudos Retrospectivos , Stents , Conduta ExpectanteRESUMO
Endocrine disruptor chemicals (EDCs) are ubiquitous contaminants in the environment, wildlife, and humans. During the last 20 years, several epidemiological, clinical and experimental studies have demonstrated the role of EDCs on the reduction of male and female fertility. The concept of foetal origins of adult disease is particularly topical in the field of reproduction. Moreover, exposure to EDCs during pregnancy has been shown to influence epigenetic programming of endocrine signalling and other important physiological pathways, and provided the basis for multi- and transgenerational transmission of adult diseases. However, the large panel of EDCs simultaneously present in the air, sol and water makes the quantification of human exposition still a challenge. Gas chromatography coupled with mass spectrometry, the measurement of total plasmatic hormonal bioactivity on stably transfected cell lines as well as the EDC analysis in hair samples are useful methods of evaluation. More recently, microRNAs analysis offers a new perspective in the comprehension of the mechanisms behind the modulation of cellular response to foetal or post-natal exposure to EDCs. They will help researchers and clinicians in identifying EDCs exposition markers and new therapeutic approaches in the future.
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Disruptores Endócrinos , Adulto , Disruptores Endócrinos/efeitos adversos , Disruptores Endócrinos/análise , Feminino , Fertilidade , Humanos , Masculino , Gravidez , ReproduçãoRESUMO
INTRODUCTION: The pancreas is the fourth most frequently involved solid organ in pediatric abdominal trauma. We present the case of a giant pancreatic pseudocyst secondary to trauma and how it was radiologically and surgically managed. CLINICAL CASE: This is the case of a 13-year-old male patient admitted as a result of a grade IV pancreatic lesion, which turned into a 170x86x180 mm pancreatic pseudocyst. Intracystic bleeding required radiological embolization of the proximal gastroduodenal artery. Subsequent abdominal compartment syndrome, biliary leak, and chemical peritonitis required laparotomy and collection drainage. Pancreatitis and duct fistula had a slow but favorable progression. DISCUSSION: The presence of duct damage is a failure predictor in the conservative treatment of pancreatic trauma. Surgical management could be indicated in recurrent, multiple, or giant (> 200 mm) pseudocysts. Intracystic bleeding is rare but potentially fatal. Selective angiogram could be a useful tool for improved prognosis.
INTRODUCCION: El páncreas es el cuarto órgano sólido más afectado en el traumatismo abdominal infantil. Presentamos la complicación de un pseudoquiste pancreático gigante secundario a traumatismo y su manejo radiológico y quirúrgico. CASO CLINICO: Varón de 13 años que ingresa por lesión pancreática grado IV, que evoluciona desarrollando un pseudoquiste pancreático de 170x86x180 mm. Un sangrado intraquístico requirió embolización radiológica de la arteria gastroduodenal proximal. El posterior síndrome compartimental abdominal, fuga biliar y peritonitis química obligaron a realizar una laparotomía y drenaje de colecciones. La pancreatitis y fístula ductal tuvieron una progresión lenta pero favorable. COMENTARIOS: La presencia de daño ductal es un predictor de fracaso del tratamiento conservador en el traumatismo pancreático. El manejo quirúrgico podría indicarse en pseudoquistes recurrentes, múltiples o gigantes (> 200 mm). El sangrado intraquístico es raro pero potencialmente letal, pudiendo ser la angiografía selectiva una herramienta útil en la mejora del pronóstico.
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Pseudocisto Pancreático , Pancreatite , Adolescente , Criança , Drenagem , Humanos , Laparotomia , Masculino , Pâncreas/diagnóstico por imagem , Pâncreas/cirurgia , Pseudocisto Pancreático/diagnóstico por imagem , Pseudocisto Pancreático/cirurgia , Pancreatite/cirurgiaRESUMO
COVID-19 began in December 2019 then spread worldwide. Providers, including pediatric urologists, had to adapt their clinical processes, and many non-covid research activities were suspended. COVID-19 impacts how research is financed, performed, and published, and is itself the subject of intense research. We present current research and publications specifically related to the urinary tract and the pediatric population.
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COVID-19 , Urologia , Criança , Humanos , SARS-CoV-2 , UrologistasRESUMO
BACKGROUND: Burnout, which includes emotional fatigue, cynicism and low personal accomplishment is linked to poor job satisfaction, decreased empathy, job withdrawal, increased absenteeism and increased medical errors, and is present among pediatric urologists. OBJECTIVE: We aimed to determine the incidence of burnout among the members of the French-speaking Society of Pediatric and Adolescent Urology (SFUPA) and determine which external factors, such as marital or familial status, gender, age, type of practice or religious belief, impacted burnout rates. MATERIAL AND METHOD: We sent all members of the French-speaking Society for Pediatric and Adolescent Urology (SFUPA) an anonymous online questionnaire containing the validated French version of the 22-item Maslach Burnout Inventory - Human Services Survey (MBIHSS). The questionnaire comprised further questions on age, gender, marital status, presence of children at home, type of practice, professional status (trainee, consultant, or academic position), spirituality and whether responders believed they presented signs of burnout. RESULTS: 70 out of 94 members of the SFUPA answered the questionnaire (response rate 74%). The number of responders who presented high scores in one, two or the three domains of the questionnaire were respectively 48.6% (IC 95%: 36-61%), 21.4% (IC 95%: 12.5-33%) and 8.6% (IC 95%: 3-18%). 34.6% of responders who believed they presented no signs of burnout actually did have a high burnout score in at least one domain. There was no significant association between age, gender, having children or being a trainee and the presence of burnout. However, marital status and workplace were significantly associated with presence of signs of burnout. DISCUSSION: Burnout is a distinct type of work-related stress - a state of physical or emotional exhaustion that also involves a sense of reduced accomplishment and loss of personal identity. In our study the most significant factor was working in Academic hospitals which can be associated with administrative workload, long hours and a lack of institutional resources. Being in a couple was also associated with less burnout, thus showing the importance of healthy relationships and sharing on burnout rate. Age, however was not associated significantly with burnout nor was gender, which is in coherence with previous findings. CONCLUSION: Amongst members of the French-speaking Society of Pediatric and Adolescent Urology, nearly half presented signs of burnout, especially those working in academic hospitals. Marital status also influenced burnout rates. Scientific societies should work on developing tools to identify and accompany affected individuals.
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Esgotamento Profissional , Urologia , Adolescente , Esgotamento Profissional/epidemiologia , Criança , Estudos Transversais , Humanos , Satisfação no Emprego , Fatores de Risco , Inquéritos e Questionários , Carga de TrabalhoRESUMO
Ovarian sex cord-stromal tumors are rare tumors that originate from the nongerminal cells of ovary. Two decades ago, the identification of juvenile granulosa-cell tumors (GCT), as a specific entity inside this group, allowed a better treatment of these tumors in children. However, little data have been reported on the natural course of the disease and reliable prognostic factors have not been yet defined. We here review the clinical and genetics aspects of granulosa tumors, based on a series of 40 children. This national collaborative study involved the French Society of Children Cancer and eight clinical departments of pediatric endocrinology. We found that early diagnosis of a tumor, revealed by clinical signs of hyperoestrogeny, is an important prognostic factor. The pathophysiology of these tumors is still debatable and several cellular- and molecular-abnormal signals could be implicated in their development. The role of growth factors and oncogenes through the signaling pathway of MAP kinase is still discussed. According to our data, FSH signaling-transduction pathway, such as a constitutionally activated Galphas, could also be implicated in the induction of granulosa cell proliferation and seems to modulate the invasiveness of the tumor. Last, we have described a low-expression pattern or an extinction of an ovarian-determination gene, FOXL2, which is related to a worse prognosis of this tumor.
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Fatores de Transcrição Forkhead/análise , Tumor de Células da Granulosa/patologia , Células da Granulosa/patologia , Neoplasias Ovarianas/patologia , Adolescente , Fatores Etários , Criança , Pré-Escolar , Feminino , Proteína Forkhead Box L2 , Fatores de Transcrição Forkhead/genética , Fatores de Transcrição Forkhead/fisiologia , Tumor de Células da Granulosa/fisiopatologia , Tumor de Células da Granulosa/cirurgia , Tumor de Células da Granulosa/terapia , Células da Granulosa/metabolismo , Humanos , Neoplasias Ovarianas/fisiopatologia , Neoplasias Ovarianas/cirurgia , Neoplasias Ovarianas/terapia , PrognósticoRESUMO
The present article is a second part related to evidence based medicine (EBM) in a series of five by the European society for paediatric urology (ESPU) research committee. It will present the different databases/search engines available to clinicians and researchers and describe strategies to focus the search to one's particular needs. Indeed, databases/search engines used and search strategy should vary according to the goal of the research. If the aim is to address a clinical problem, the search should allow to identify a small number of most pertinent articles (high specificity); if the search is for research purposes, instead, it should ensure no meaningful articles are overlooked (high sensitivity).
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Medicina Baseada em Evidências/estatística & dados numéricos , Publicações , Urologia , Criança , HumanosRESUMO
The Research Committee of the European Society of Pediatric Urology will present a series of short educational communications related to evidence-based medicine. The aim of the series is to emphasize the importance of grading evidence, thereby determining the best clinical practice for patients. The goal of this series is to guide the clinician in using tools for setting up a clinical question, finding appropriate information, searching appropriate databases, and evaluating the results in relation to the patient in mind. This first part will serve as an introduction or background. Following publications will cover the topics of hierarchy of evidence, information acquisition, clinical appraisal tools, and applications in clinical practice [3].
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Medicina Baseada em Evidências , Pediatria , UrologiaRESUMO
The present article is the third installment in a five-part series related to evidence-based medicine (EBM) provided by the European Society for Paediatric Urology Research Committee. It will present the different levels of evidence (i.e. systematic review, randomized controlled trial, cohort study) available to clinicians and researchers and describe the strengths of each study type. While EBM provides a valuable construct to aid in medical decision-making, it remains imperative that this information be interpreted and applied in the clinical context with a good dose of common sense.
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Medicina Baseada em Evidências/métodos , Sociedades Médicas , Urologia , Europa (Continente) , Humanos , Ensaios Clínicos Controlados Aleatórios como AssuntoRESUMO
This manuscript is the fourth in a five part series related to evidence based medicine (EBM) provided by the European society of pediatric urology (ESPU) research committee. It will present a way to come to a quick and critical appraisal of available evidence on a specific topic: a CAT (critically appraised topic). The way how to write a cat is described for interventions to be compared to a control group, and for other, more generalized clinical questions. While systematic reviews provide a throughout overview of all evidence available, a CAT provides a shorter way to come to quick insights based on EBM.
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Pesquisa Biomédica/métodos , Medicina Baseada em Evidências/métodos , Urologia , Criança , HumanosRESUMO
PURPOSE: Controversy persists concerning the management of post-appendectomy intra-abdominal abscesses. We hypothesised that most of these abscesses can be successfully managed by antibiotic treatment alone, avoiding the complications of surgical treatment. METHODS: Hospital records of children treated in our unit for intra-abdominal post-appendectomy abscesses over a 6-year period were reviewed retrospectively. RESULTS: This study investigates a series of 26 children from 2 to 15 years of age presenting with one or more post-appendectomy intra-abdominal abscesses. After an average delay of 7 days after initial surgery, 23 children had developed an isolated abscess, while 3 children had multiple abscesses. Twenty-two patients (84.8 %) were treated conservatively by intravenous triple antibiotic therapy alone. Complete clinical, radiological and biological resolution of the abscesses was obtained in all of these children after a mean hospitalisation of 8 days. Four children (15.2 %) were treated surgically: three children with a stable patient status and one child with septic shock requiring urgent surgery. CONCLUSION: The results suggest that intravenous triple antibiotic therapy alone is an efficacious first-line treatment in children developing intra-abdominal abscesses following appendectomy. Surgical intervention is rarely necessary except in patients with an alarming patient status or with signs of septic shock.
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Abscesso Abdominal/tratamento farmacológico , Antibacterianos/administração & dosagem , Apendicectomia , Complicações Pós-Operatórias/tratamento farmacológico , Abscesso Abdominal/diagnóstico por imagem , Abscesso Abdominal/etiologia , Adolescente , Cefotaxima/administração & dosagem , Criança , Pré-Escolar , Protocolos Clínicos , Quimioterapia Combinada , Feminino , Gentamicinas/administração & dosagem , Humanos , Masculino , Metronidazol/administração & dosagem , Estudos Retrospectivos , UltrassonografiaRESUMO
The authors present an early laparoscopic treatment in a newborn with biliary atresia. They describe the technical details of the Kasai laparoscopic procedure. A 10-day-old girl, weight 2.4 kg, was admitted with a history of jaundice and fecal acholia since birth, with elevated total bilirubin and abnormal hepatic test. Abdominal ultrasound showed a small gallbladder with hyperechogenicity in porta hepatis and absence of biliary principal duct. Other metabolic and hematological tests were normal. The procedure was performed at 20-day-old by laparoscopy. The cholangiography confirmed the biliary atresia and Kasai's procedure was continued by laparoscopy and transumbilical extracorporeal Roux-Y approach. The duration of the procedure was 220 min, with good tolerance of pneumoperitoneum due to the laparoscopy. Feedings of breast milk began on the third day postoperative, presenting normal colored stools, with normalization of the hepatic test. A 20 months follow-up was without complications.
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BACKGROUND: Activating mutations of the Gsalpha gene (GNAS), which encodes for the alpha-subunit of the stimulatory G protein, have been identified in patients with McCune-Albright syndrome (MAS). Accuracy and sensitivity in the molecular diagnosis of MAS is mandatory for optimal therapeutic strategy and adapted follow-up, especially for incomplete clinical forms of MAS. To date, the highly sensitive nested PCR method with intermediary digestion by a restriction enzyme at the mutation site is one of the most widely used techniques. This study evaluated a new diagnostic method using a peptidic nucleic acid (PNA) and compared it with the nested PCR method. MATERIAL AND METHODS: One hundred and forty-eight DNA samples from eighty-eight patients presenting clinical symptoms compatible with MAS were included. The DNA samples were mainly obtained from peripheral blood, ovarian tissue or cyst liquid, and bone lesions. The nested PCR method required 4 days. PNA clamping required 1.5 days and utilized the higher thermal stability and specificity of PNA-DNA coupling to inhibit PCR product formation. Direct sequencing was subsequently performed in all cases. RESULTS: The sensitivity of mutation detection was 54% (n = 80) for nested PCR and 46.6% (n = 69) for PNA (P > 0.05). The 11 cases where PNA failed to detect the mutation were mainly incomplete and atypical clinical forms of MAS (n = 10/11). The cost per sample was 50 Euros for PNA clamping versus 136 Euros for nested PCR. CONCLUSION: PNA clamping is a rapid, reliable, and economical method to diagnose MAS. It should be the first-line diagnostic method, although negative results, especially for incomplete clinical forms of MAS, should be confirmed by nested PCR.
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Displasia Fibrosa Poliostótica/diagnóstico , Displasia Fibrosa Poliostótica/genética , Subunidades alfa Gs de Proteínas de Ligação ao GTP/genética , Testes Genéticos/métodos , Ácidos Nucleicos Peptídicos , Reação em Cadeia da Polimerase/métodos , Criança , Cromograninas , Análise Mutacional de DNA/métodos , Análise Mutacional de DNA/normas , Feminino , Testes Genéticos/normas , Humanos , Masculino , Reação em Cadeia da Polimerase/normas , Reprodutibilidade dos Testes , Mapeamento por Restrição/métodos , Mapeamento por Restrição/normas , Sensibilidade e EspecificidadeRESUMO
BACKGROUND: There are very few data on the natural history of ovarian granulosa cell tumors (OGCT) in children. The aim of this study was to determine whether early recognition and diagnosis of the initial endocrine signs could improve the outcome of these tumors. METHODS: In a nationwide study from 1990 to 2004, we analyzed the clinical, biological and pathologic data from 40 pre- and postpubertal girls presenting an OGCT. RESULTS: 1. Among the prepubertal girls (n = 29), 17 OGCTs were diagnosed on the basis of precocious pseudopuberty. None of the 17 girls had a peritoneal spread of the tumor (100% FIGO stage Ia). Diagnosis based on a tumoral or acute abdomen (12 cases) was associated with frequent intraperitoneal ruptures of the tumor (50%) and a risk of relapse (2 cases). Of the eight girls who had had a misdiagnosed precocious pseudopuberty, five had a pre- or perioperative tumoral rupture. 2. Among the postpubertal girls (n = 11), endocrine manifestations such as secondary amenorrhea or virilization had been underevaluated in three of them and the diagnosis was established from a tumoral abdomen. This clinical presentation was associated with frequent ruptures of the mass in the peritoneum (80%) and a higher risk of recurrence (30%). 3. A delayed diagnosis of OGCT despite previous endocrine signs (11 cases; 8 pre- and 3 postpubertal) was associated with a high risk of pre- or peri-operative peritoneal tumor spreading (70% FIGO stage Ic or IIc, p <0.05). The mean delay for diagnosis ranged from 3 to 11 months. CONCLUSION: This study highlights the critical role of early diagnosis of OGCT in pre- and postpubertal girls, particularly at the first seemingly banal signs of endocrine disorder. Peritoneal spread of the tumor may thereby be prevented, which improves the prognosis.