Tıp Fakültesi / Faculty of Medicine

Permanent URI for this collectionhttps://hdl.handle.net/11727/1403

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2014 - 20183

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Author: search.filters.author.Ozturk, AhmetHas files: No

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    Lower Extremity Involvement of a Primarily Intracranial Hydatid Cyst: A Case Report
    (2014) Altinel, Faruk; Tuncel, Deniz; Ozturk, Ahmet; Acikalin, Mustafa Fuat
    Hydatid Cyst is a parasitic disease. The host is usually the intestine of dog. Hydatid cyst is caused by water and food contaminated with parasites' larva. Primary intracranial cyst hydatids are rare. Approximately 75% of intracranial cyst hydatids are encountered in children. We report a pediatric case with intracerebral hydatid cyst occuring with a lower extremity involvement 5 months after the surgery with clinical, radiological and histopathological features.
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    Factors Affecting Complication Rates of Percutaneous Nephrolithotomy in Children: Results of a Multi-Institutional Retrospective Analysis by the Turkish Pediatric Urology Society
    (2014) Onal, Bulent; Dogan, Hasan Serkan; Satar, Nihat; Bilen, Cenk Y.; Gunes, Ali; Ozden, Ender; Ozturk, Ahmet; Demirci, Deniz; Istanbulluoglu, Okan; Gurocak, Serhat; Nazli, Oktay; Tanriverdi, Orhan; Kefi, Aykut; Korgali, Esat; Silay, Mesrur Selcuk; Inci, Kubilay; Izol, Volkan; Altintas, Ramazan; Kilicarslan, Hakan; Sarikaya, Saban; Yalcin, Veli; Aygun, Cem; Gevher, Fetullah; Aridogan, Ibrahim Atilla; Tekgul, Serdar; 24095906
    Purpose: We assessed factors affecting complication rates of percutaneous nephrolithotomy in children. Materials and Methods: We retrospectively evaluated data on 1,205 renal units in 1,157 children treated with percutaneous nephrolithotomy at 16 Turkish centers between 1991 and 2012. Of the patients 28.3% had a history of urolithiasis. Complications were evaluated according to the Satava classification system and modified Clavien grading system. Univariate and multivariate analyses were done to determine predictive factors affecting complication rates. Results: A total of 515 females and 642 males were studied. Mean +/- SD patient age was 8.8 +/- 4.7 years (range 4 months to 17 years). Mean +/- SD stone size, operative time and postoperative hospital stay were 4.09 +/- 4.06 cm 2, 93.5 +/- 48.6 minutes and 5.1 +/- 3.3 days, respectively. Postoperative stone-free rate was 81.6%. A total of 359 complications occurred in 334 renal units (27.7%). Complications were intraoperative in 118 cases and postoperative in 241. While univariate analysis revealed that stone history, positive urine culture, operative time, length of hospitalization, treatment success, punctured calyx and location of the stone significantly affected the complication rates (p <0.05), operative time, sheath size, mid calyceal puncture and partial staghorn formation were the statistically significant parameters affecting complication rates on multivariate logistic regression analysis. Conclusions: Percutaneous nephrolithotomy is the treatment of choice for most renal calculi in children. The technique is effective and safe in children, with a high success rate and a low rate of major complications. The significant factors identified should be considered by clinicians to decrease associated complication rates.
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    Renal Stone Composition Does not Affect The Outcome of Percutaneous Nephrolithotomy in Children
    (2018) Kaygisiz, Onur; Turegun, Fethi Ahmet; Satar, Nihat; Ozen, Ender; Toksoz, Serdar; Dogan, Hasan Serkan; Piskin, Mehmet Mesut; Izol, Volkan; Sarikaya, Saban; Kilicarslan, Hakan; Cicek, Tufan; Ozturk, Ahmet; Tekgul, Serdar; Onal, Bulent; 29761226
    Purpose We sought to investigate the association between renal stone composition and percutaneous nephrolithotomy outcomes in pediatric patients and define the characterization of the stone composition. Methods The data of 1157 children who underwent percutaneous nephrolithotomy between 1991 and 2012 were retrieved from the multicenter database of the Turkish Pediatric Urology Society. The study population comprised 359 children (160 girls, 199 boys) with stone analyses. Patients were divided into five groups according to the stone composition [group 1: calcium oxalate; group 2: calcium phosphate; group 3: infection stones (magnesium ammonium phosphate, ammonium urate); group 4: cystine; group 5: uric acid, xanthine stones]. Results Patient characteristics, perioperative, postoperative, and stone characteristics were compared considering the stone composition. There were no significant differences between the groups concerning age, sex, side involved, preoperative hematocrit levels, and solitary renal unit. Patients with cystine stones were more likely to have a history of stone treatment. Groups 2 and 5 had mostly solitary stones. However, group 3 had staghorn stone more often, and group 4 frequently had multiple stones. Overall stone-free rate (79.4%) was similar among the groups. Although stone composition was related to blood transfusion and prolonged operative and fluoroscopy screening times on univariate analysis, it was not a significant predictor of them on multivariate analysis. Conclusions Stone composition was not a predictor of outcomes of pediatric percutaneous nephrolithotomy. However, cystine and infection stones, which are larger and filled multiple calyxes due to the nature of stone forming, were more challenging cases that need multiple tracts.