Idiopathic urolithiasis in Tunisian children: a report of 134 cases.

We evaluated the metabolic and the nutritional aspects of 134 urolithiasis children in order to outline the characteristics of idiopathic urolithiasis in children. This prospective study group of 134 children (56 females, 78 males) with renal calculi was evaluated. The age range of the patients was six months to 16 years. A dietary survey was performed on every child. All patients were investigated with respect to stone localization and serum and urine risk factors. Statistical analysis of data was carried out using software SPSS 11.0 for Windows. Hypercalciuria was the most common risk factor detected in this group (28.3%). A decrease of water intake was noted in all age groups, especially in the rural area (549.6 mL/day vs. 1150.6 mL/day), and there was an increase in animal protein intake in 17 cases (mean: 1.9 g/kg). In addition, increased intake of starchy foods and food with high oxalate content (sorgum) were detected in the ten to 16 years age group (51%) of our study. Calcium oxalate monohydrate represents the principal component of idiopathic stone (58.2%), which is more frequent in children (68%) than in infants (51.7%) (P <0.02). The major etiology of idiopathic urolithiasis highlights the influence of dietary habit in stone formers in our country. The increased occurrence of calcium oxalate stones in school age children confirms the change in the etiology of urolithiasis according to age.

Cambios en el tipo de cálculos renales según sexo y edad en pacientes tunecinos / Changes in Kidney Stones Type According to Sex and Age in Tunisian Patients

Objetivos: Los estudios que evalúan el efecto de la edad y el género sobre la composición de las piedras renales son escasos. El objetivo de este estudio es subrayar la modificación de las características epidemiológicas de esta patología de acuerdo con el sexo y la edad de los pacientes. Material y métodos: Estudiamos a 1.269 pacientes con urolitiasis de edades comprendidas entre 6 meses y 92 años y que se conocía que tenían cálculos urinarios (752 varones y 517 mujeres). Se realizó un análisis de las piedras usando un microscopio estereoscópico y espectroscopía infrarroja para determinar respectivamente el tipo morfológico y la composición molecular de cada una. Resultados: La incidencia anual promedio de formación de nuevas piedras fue de 30,25 por cada 100.000 personas. En 1.041 pacientes (el 81%) los cálculos estuvieron localizados en el tracto urinario superior. Los niños y ancianos fueron más afectados por piedras en la vejiga. El monohidrato de oxalato de calcio sigue siendo el componente más frecuente de los cálculos, a pesar de que su frecuencia caía en relación con la edad (63,2% en adolescentes y 40,6% en ancianos [p<0,05]). Las piedras de estruvita fueron raras (3,5%) y más frecuentes en niños. Conclusión: El análisis de estos datos muestra que los cálculos urinarios en Túnez tienden a evolucionar en la misma dirección que en países indrustrializados (AU)

Background: Studies that evaluate the effect of age and gender on the stone composition are scarce. The aim of this study is to highlight the modification of epidemiological characteristics of this pathology according to patients’ sex and age. Patients and methods: We studied 1269 urolithiasic patients ranging from 6 months to 92 years old and known as having urinary stones (752 males and 517 females). Stone analysis was performed respectively using a stereomicroscope and infrared spectroscopy to determine, respectively, the morphological type and molecular composition of each. Results: The annual average incidence of new stone formation was 30.25 per 100000 inhabitants. In 1041 patients (81%), calculi were located in the upper urinary tract. Children and old man were more affected by bladder stone. Calcium oxalate monohydrate remains the most frequent stone component even if its frequency fell according to age (63.2% in teenagers and 40.6% in elderly [p<0.05]) in favour of the increase of uric acid stones (3,5% in teenagers and 41.5% in elderly [p<0.05]). Struvite stones were rare (3.5%) and more frequent in children. Conclusion: The analysis of these data shows that urinary stones in Tunisia are tending to evolve in the same direction as in industrialized countries (AU)

[Changes in kidney stones type according to sex and age in Tunisian patients]. / Cambios en el tipo de cálculos renales según sexo y edad en pacientes tunecinos.

BACKGROUND: Studies that evaluate the effect of age and gender on the stone composition are scarce. The aim of this study is to highlight the modification of epidemiological characteristics of this pathology according to patients' sex and age. PATIENTS AND METHODS: We studied 1269 urolithiasic patients ranging from 6 months to 92 years old and known as having urinary stones (752 males and 517 females). Stone analysis was performed respectively using a stereomicroscope and infrared spectroscopy to determine, respectively, the morphological type and molecular composition of each. RESULTS: The annual average incidence of new stone formation was 30.25 per 100,000 inhabitants. In 1041 patients (81%), calculi were located in the upper urinary tract. Children and old man were more affected by bladder stone. Calcium oxalate monohydrate remains the most frequent stone component even if its frequency fell according to age (63.2% in teenagers and 40.6% in elderly [p<0.05]) in favour of the increase of uric acid stones (3,5% in teenagers and 41.5% in elderly [p<0.05]). Struvite stones were rare (3.5%) and more frequent in children. CONCLUSION: The analysis of these data shows that urinary stones in Tunisia are tending to evolve in the same direction as in industrialized countries.

[Epispadiac urethral duplication in boys]. / L'urètre surnuméraire épispade chez le garçon.

Urethral duplication, also called supernumerary urethra, is a rare malformation essentially affecting the boys. It is defined by juxtaposition of two or more muscular channels with urinary tract mucosal lining. Various features may be observed depending on the site of the extra urethra and its incomplete or complete nature. In this study, the authors examined a particular aspect of this malformation, the epispadiac form.

Spontaneous perforation of the extrahepatic bile duct in infancy: report of two cases and literature review.

BACKGROUND: Spontaneous perforation of the bile duct (SPBD) is a rare disease in infancy. The pathogenesis, diagnostic modalities and treatment options for this condition are reviewed and discussed. METHODS: The authors report 2 new observations of SPBD in 2 male newborns aged respectively 27 and 21 days. RESULTS: The 2 newborns presented with cholestatic jaundice. Abdominal sonography showed an extrahepatic mass. Exploratory laparotomy revealed that the perforation was located in the cystic duct in the first case and in the common bile duct (CBD) in the second. The site of perforation was repaired and both patients underwent simple external biliary drainage. The postoperative course was uneventful for both patients with follow-up ranging from 2 to 4 years. CONCLUSIONS: SPBD is a rare, but important cause of surgical jaundice in infants. The pathogenesis of SPBD is unknown and multifactorial and diagnosis is often problematic. Surgical management is always required and a conservative approach is usually recommended. The prognosis is good with early surgical management.

[Intussusception owing to pathologic lead points in children: report of 27 cases]. / Les causes inhabituelles d'invagination intestinale aiguë: à propos de 27 cas.

OBJECTIVE: Intussusception owing to pathologic lead points is a challenging condition for pediatric surgeons. The aim of this study was to review the particularities of clinical presentation, the place of morphologic investigation in depicting the presence of an organic lesion and the management of secondary intussusception. PATIENTS AND METHODS: The authors report a series of 27 patients treated from 1986 to 2004, for secondary intussusception. RESULTS: Nineteen boys and 8 girls, aged from 45 days to 11 years (mean age: 40 months) presented with secondary intussusception: Meckel's diverticulum (13 cases); lymphoma (8 cases); intestinal duplication (3 cases); heterotopic pancreas (2 cases); intestinal polyp (1 case). All patients were operated upon after failure of hydrostatic reduction. An intestinal resection with an end to end anastomosis was done for 26 patients. The biopsy of a large abdominal mass after an easy reduction of the intussusception was performed in 1 case. Chemotherapy was started at the sixth postoperative day for the 8 children having lymphoma. Two of them died during therapy. For the 25 others, the postoperative course was uneventful with a mean follow-up of 4 years. COMMENTARY: The improvement of the management and the prognosis of secondary intussusception requires an early diagnosis. Morphologic examination must not be limited to the diagnostic of intussusception but must aim at searching a lead point. The reduction of this particular form is based exclusively on surgery.

[Morgagni hernia in infancy: report of 7 cases]. / Les hernies rétrocostoxiphoïdiennes chez l'enfant: à propos de 7 cas.

BACKGROUND: Morgagni or retrosternal hernia is a rare entity. It's representing almost 4% of all types of congenital diaphragmatic hernias in children. POPULATION AND METHODS: The data concerning 7 infants with Morgagni hernias (MH) have been retrospectively reviewed by the authors. RESULTS: Their ages at presentation ranged from 7 months to 11 years. There were 4 males and 3 females. The majority of patients had repeated chest infections. The diagnosis was made on chest radiograph and barium enema. All patients were operated through the abdomen (5 upper midline, 2 laparoscopic approach). The hernia sacs were excised and the defects repaired in all patients. DISCUSSION: Clinical awareness, early diagnosis and surgical treatment especially with laparoscopic correction, are important factors. CONCLUSION: Surgical correction is needed for asymptomatic MH in children to obviate the risk of complications and because the treatment is easy.

[Congenital esophageal stenosis due to tracheobronchial remnants: report of 2 cases and literature review]. / Sténose congénitale de l'oesophage par hétérotopie trachéobronchique: à propos de 2 cas et revue de littérature.

Congenital esophageal stenosis due to tracheobronchial remnants is a rare malformation whose diagnosis may be difficult. It is characterised by the abnormal presence of congenital tissue of tracheal origin in the esophageal wall, which is responsible for the narrowing of the esophagus. We report 2 cases whose treatment was surgical after failure of esophageal dilations. The presence of tracheal-bronchial tissue was confirmed by histological examination of the operative piece. Outcome was favourable and the final result was excellent. Recently, endoscopic ultrasonography has been proved useful in the diagnosis of congenital esophageal stenosis due to tracheobronchial remnants by showing the presence of cartilage, which explains the failure of dilation. The high rate of perforation in these cases is due to brutal fragmentation of the cartilaginous rings. Surgical resection of esophageal stenosis with the tracheobronchial tissue appears the only treatment susceptible to completely suppress the stenosis and its consequences.

Pediatric urolithiasis in Tunisia: a multi-centric study of 525 patients.

PURPOSE: To investigate retrospectively the clinical and epidemiological characteristics, and method of treatment of childhood urolithiasis, a major urological problem in Tunisia. MATERIALS AND METHODS: The records of 525 children with urolithiasis treated in Tunisia between 1990 and 2004 were reviewed in a multi-centric study with regard to age at diagnosis, sex, history, and physical, laboratory, and radiologic findings. Metabolic evaluation when performed included serum electrolytes, calcium, phosphorus, uric acid, 24-h urine collection for calcium and creatinine, and a sodium nitroprusside test for cystine. In all cases urine specimens were sent for culture. RESULTS: The stone was located in the upper tract in 420 (80%) and lower tract in 105 children. Of the urine cultures, 40% were positive. Metabolic investigation was performed in 201 patients and was normal in 170 (84%). Urinary stasis secondary to a urinary tract anomaly that led to the formation of stones was found in 77 patients. Stones were treated by surgery (80%), extracorporeal shock wave lithotripsy (ESWL) (5%) and ureteroscopic extraction (4%), and percutaneous nephrolithotomy was performed in 10 patients (2%). The stone passed spontaneously in 9% of cases. CONCLUSION: The use of ESWL and endourological methods of treatment for childhood urolithiasis must be generalized, with open surgery being reserved for particular and complex cases.

[Malignant renal tumors before one year of age. Experience of a North African pediatric surgery service]. / Tumeurs rénales malignes avant l'âge d'un an. Expérience d'un service de chirurgie pédiatrique nord Africain.

UNLABELLED: The malignant tumours of the kidney are not very frequent during the first year of life and pose diagnostic and therapeutic problems. The aim of this work is to make an analysis of the epidemiologic, clinical and anatomo-pathological characteristics of these tumours during the first year of life and a development on the therapeutic methods and their results. MATERIAL AND METHODS: [corrected] This is a retrospective study of 8 observations of malignant tumours of the kidney whose first symptomatology appeared during the first year of life. RESULTS: The malignant tumours of the kidney observed before the one year age constituted 18% of the tumours of the kidney in the child. A female prevalence was noted with a sex-ratio of 0.6. The assessment of extension found cutaneous (one case), ganglionic (one case) and pulmonary (two cases) metastases. First chemotherapy was prescribed to five patients. The surgery consisted on a widened nephrectomy in seven cases and a tumorectomy for an infant presenting a nephroblastomatosis. The tumour corresponded to a nephroblastoma in seven cases and a rhabdoide tumour in the last case. Mortality was high (50%) caused by the toxicity of chemotherapy in three cases and an advanced stage of cancer in one case. CONCLUSION: Renal tumoral pathology occurring in infants less than one year of age poses true etiologic and therapeutic problems. The high frequency of the nephroblastoma and the absence of benign tumour in our series encourage us to evocate more often the malignant renal tumours and to practice per cutaneous biopsies in case of diagnostic doubt.

[Urethral duplication in boys: report of 4 cases]. / La duplication urétrale chez le garçon: à propos de 4 cas.

Urethral duplication is a rare anomaly, affecting mainly boys. The clinical presentation varies because of the different anatomical patterns of this abnormality. We report 4 cases of urethral duplication in children. An epispadiac duplication was present in 1 case, hypospadiac duplication in 1 case, Y-duplication in 1 case and a congenital prepubic sinus in the last case. The pre-operative probe was based on urethrocystography and fistulography. The surgical management included excision of the duplicated urethra in 3 cases. Transurethral incision of the intra-urethral septum was performed in the case of hypospadiac duplication. The characteristics of male urethral duplication are reviewed.

[Pneumatic dilatation of caustic esophageal stenosis in children. Report of five cases]. / Dilatation pneumatique des sténoses caustiques de l'oesophage chez l'enfant. A propos de cinq cas.

The ingestion of caustic substances is a frequent accident in the child. The treatment of caustic strictures of the esophagus, which constitute the most frightening complication, varies from conservative treatment to esophageal replacement. We report the preliminary results of a prospective work established since July 1998 and aimed at evaluating the role of pneumatic dilatation in the treatment of these injuries. STUDIED POPULATION: The series included five boys with an average age of six years. Two children were neurologically handicapped. RESULTS: The caustic product was soda (three cases), a dishwasher solution (one case) and bleach (one case). Dysphagia was constant and concerned the semi-fluids in four cases. The stricture was extended over an average length of 4 cm. The total number of dilatations was 36, with an average of seven sessions/patient. No complication was noted. The result was good in four cases. The only failure was noted in a child who presented a gastroesophageal reflux secondary to the scarring phenomena. CONCLUSION: Pneumatic dilatation constitute a therapeutic mean whose results are attested. The best treatment remains, however, preventive: it is the setting out of reach of the child the dangerous products.