Publications by authors named "Wojciech Apoznanski"

: Etiopathogenesis and the symptomatology of ureteropelvic junction obstruction (UPJO) in the pediatric population has not yet been definitely clarified, suggesting a multifactorial nature of the condition. The aim was to analyze the association between the number of Interstitial Cells of Cajal (ICCs), as well as PX receptors in ureteropelvic junction (UPJ) and the pain response in pediatric patients with hydronephrosis. 50 patients with congenital hydronephrosis underwent open or laparoscopic pyeloplasty at one of two departments of pediatric surgery and urology in Poland.

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Micturition is an involuntary process based on spinal arcs in infants and children until a defined age. The awareness and voluntary control of voiding depends on specific areas in the central nervous system, especially cortical regions. The cells and connections between these areas develop over time and regulate the voiding process.

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Outcomes evolution during the learning curve of laparoscopic transperitoneal heminephrectomy in children with a duplex kidney. The data of 33 children, operated on between 2008 and 2017, with complicated duplex kidney, were subjected to a retrospective analysis. All patients were operated on by transperitoneal access using the laparoscopic technique.

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Introduction: The aim of the study was to compare the efficacy of laparoscopic versus open dismembered pyeloplasty in children.

Material And Methods: Two hundred and twenty-six Anderson-Hynes pyeloplasties were performed, out of which 131 by open access (OP) and 95 by laparoscopic access (LP). Retrospective analysis of data was performed.

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Assessment of the efficacy of intraoperative diagnosis between extrinsic and intrinsic UPJO in children. Assessment of the efficacy of laparoscopic vascular-hitch procedure in UPJO caused by lower pole crossing vessels (CV). Between 2008 and 2017, 47 laparoscopic procedures were performed with the CV discovered intraoperatively.

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Background: A bundle of crossing vessels (CV) supplying the lower pole of the kidney and causing mechanical obstruction of the ureteropelvic junction (UPJ) has been the subject of many discussions. During pyeloplasty, it is possible to overlook the CV. This may result in recurrent dilatation of the kidney and the need for re-surgery.

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Introduction: Anderson-Hynes (A-H) dismembered pyeloplasty has remained nearly unchanged since its introduction in 1949. The authors present a modification of the uretero-pelvic anastomosis as described by Anderson and Hynes. The new approach, called the W-type suture, is thought to be more watertight and associated with fewer complications than the original.

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Introduction: Pyeloplasty is commonly conducted in children with uretero-pelvic junction obstruction. Standard post-operational procedure involves only a short period of time after the surgery. What is the real number of complications, including those in the long-term? What is the function of the operated kidney?The aims of this study are to assess the effectiveness of pyeloplasty and to assess the suitability of conducting long term follow-up after pyeloplasty.

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Introduction: Although most urologists agree that failures after laparoscopic pyeloplasty occur usually within a year after the operation, late failures are also reported.

Aim: To assess late results of laparoscopic pyeloplasty.

Material And Methods: Seventy-eight of ninety-five patients who had been operated on between November 2001 and September 2009 were notified about the possibility of diuretic renography (DR).

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Background: Bladder cancer occurs mainly in adults. In children, younger than 10 years in particular, it is very rare.

Objectives: The aim of the study is to retrospectively evaluate the efficacy of transurethral resection of the bladder tumour (TUR-BT) of transitional cell carcinoma (TCC) of the bladder in children.

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Introduction: Nephroblastoma is one of the most common solid tumours in children. The occurrence of extrarenal nephroblastoma is exceedingly rare. What can be defined as extrarenal Wilms' tumor must satisfy the following criteria: histologically confirmed nephroblastoma and extrarenal location.

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Introduction: It is believed that lower pole crossing vessels may play an important role in the etiology of ureteropelvic junction obstruction (UPJO). A conventional operative technique, which seems to be widely used in patients with UPJO, is Anderson-Hynes (A-H) plasty with dorsal transposition of the vessel. An attractive alternative to dorsal transposition of the vessel might be its cephalad translocation.

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Background: Urethral stenosis or abnormalities in the external urethral meatus in girls may lead to serious functional bladder outlet obstruction and recurrent urinary tract infections.

Objectives: The aim of the study was to analyze the efficacy of meatotomy in girls with an anterior deflected urinary stream (ADUS) and symptoms of detrusor overactivity.

Material And Methods: A group of 67 girls between the ages of 5 and 16 (mean age: 8.

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Objective: To better understand the impact of nephron-sparing surgery (NSS) on renal function in patients with nonsyndromic unilateral Wilms tumor (uWT), a group of such patients treated with NSS were compared with a stage-matched cohort managed with radical nephrectomy (RN). The recommended management of nonsyndromic uWT is RN. However, NSS may decrease the risk of long-term renal disease and associated comorbidities.

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Fibroepithelial polyps (FEPs) are rare benign ureteral neoplasms of mesodermal origin. As an intrinsic cause of ureteropelvic junction obstruction (UPJO) they are very uncommon. Excretory urography and diuretic renography used by many urologists to diagnose a UPJO may not detect the ureteral polyp.

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The aim of the study was to describe simultaneous laparoscopic adrenalectomy and laparoscopic nephron-sparing surgery, to discuss the details of a convenient laparoscopic approach and the way of port placement, as well as to present a review of the literature concerning combined laparoscopic procedures. A 72-year-old woman was admitted to our department because of a tumor of the right adrenal gland and a small tumor of the right kidney. The patient underwent simultaneous laparoscopic adrenalectomy and laparoscopic nephron-sparing surgery.

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Purpose: The authors analysed the distribution of c-kit-positive interstitial cells of Cajal (ICCs) in obstructed ureteropelvic junction (UPJ) and its age-related changes.

Methods: Twenty specimens were obtained from children with intrinsic ureteropelvic junction obstruction (UPJO), at the average age of 8.1 years (8 months-16.

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Crossed renal ectopia (C-RE) is a rare congenital anomaly in which both kidneys are located unilaterally. The crossed kidney is situated on the side opposite to its ureteral orifice and usually lies below the normal kidney. The frequency of this malformation is estimated at 0.

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Purpose: An attempt has been made to prospectively compare the results of two laparoscopic pyeloplasties: Dismembered Anderson-Hynes (A-H) plasty and nondismembered Y-V plasty. Complications following the procedures have been studied as well.

Patients And Methods: Fifty patients with primary ureteropelvic junction obstruction (UPJO) were prospectively selected at random to undergo dismembered A-H (25 patients-even numbers) and nondismembered Y-V (25 patients-odd numbers) laparoscopic pyeloplasty.

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Xanthogranulomatous pyelonephritis (XGPN) is rare form of chronic, usually unilateral, renal infection that involves damage to the renal glomeruli and periglomerular tissue and destruction of the renal parenchyma. Nephrectomy is usually necessary and the prognosis is good if XGPN is unilateral and treated early. XGPN typically affects middle-aged females and is extremely rare in children.

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Article Synopsis
  • The authors studied interstitial cells of Cajal-like cells (ICC-LCs) in cases of obstructed ureteropelvic junction (UPJ) compared to normal specimens and examined age-related changes.
  • They analyzed 20 samples from children with UPJ obstruction and 5 control samples using immunohistochemistry to assess c-kit expression, applying statistical tests to determine significance.
  • Results showed that ICC-LCs were more densely populated in obstructed cases but decreased with age, suggesting that increased ICC-LC density may be a compensation for peristalsis issues, which may fail as patients grow older.
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Objectives: To compare the complications of laparoscopic pyeloplasty observed in 3 periods of our learning curve using the Clavien classification.

Methods: We reviewed and retrospectively analyzed the records of 150 cases of laparoscopic pyeloplasty performed for primary ureteropelvic junction obstruction at our center. All patients were divided into 3 groups according to the order of the case number (1-50, 51-100, 101-150) to compare the intergroup differences in the preoperative data and perioperative parameters.

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Background: Wilms tumour is the most common renal tumour in children, accounting for above 90% of cases and comprising 8% of paediatric solid tumours. In adults, it is extremely rare and represents only 0.5% of all renal tumours.

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