An 11-year-old boy experienced right flank pain on October 12, 2005. The pain was once alleviated but recurred on the following day, and the patient visited our hospital on October 13, 2005. An imaging study revealed a tumor, sized approximately 12.0 × 7.5 × 8.0 cm, in the right kidney without metastases, for which right nephrectomy was performed. The tumor was solid, although degenerative necrosis and hemorrhage were partially observed inside the tumor. A histopathological study revealed poorly-defined, almost round tumor cells which were strongly stained with vimentin but not with cytokeratin or epithelial membrane antigen (EMA). Based on these findings, a diagnosis of clear cell sarcoma of the kidney in Stage II was made. A review of 10 previous cases reported in Japan during the past 10 years revealed that the affected patients were mostly aged 1 month to 4 years, while our case, occurring in an 11-year-old patient, was uncommon in respect to age.
Neoplasms ; Japan ; Procedures on Kidney ; Cases ; Review of

Robotics ; Robotic Surgical Procedures ; Kidney Transplantation

Congenital megacalyces is a congenital renal disease characterized by hypoplasia of the medulla and a non-obstructive dilatation of the calyces. More than 100 cases have been reported in the literature after first described by Puigvert in 1963, but it has been reported only three cases (two cases of adults and one case of child) in the literatures in Korea. The etiology of the congenital megacalyces is unknown. Renal pelvis and ureter are mostly normal in size and there is no urinary obstruction or reflux. Renal medulla of congenital megacalyces is thinner than that of normal kidney but renal cortex retains its normal thickness and function. This is features that help to distinguish megacalyces from obstructive atropy. The calyces are polygonal in shape and the majority of kidney with megacalyces have increased number of calyces. Since congenital megacalyces is a non-progressive lesion, it is important to recognize the clinical entity and avoid unnecessary surgery. We report one case of congenital megacalyces without urinary obstruction or reflux with a brief review of related literatures.
Adult ; Dilatation ; Humans ; Kidney ; Kidney Pelvis ; Korea ; Unnecessary Procedures ; Ureter

IgG4-related sclerosing disease is a disease entity that has recently attracted attention, manifesting as a multiorgan disease characterized by high serum IgG4 levels, extensive IgG4-positive plasma cells and lymphocyte infiltration of the affected organs, with the pancreas (autoimmune pancreatitis) and kidney as representative targets. In cases of renal involvement, parenchymal lesions are predominant, such as renal cortical lesions or diffuse renal enlargement. However, mass-like lesions involving the renal pelvis are very rare, and mass forming or pelvic involvement types should be distinguished from lymphomas, metastatic cancers and other genitourinary malignancies to avoid unnecessary surgery. Herein, we report a case of IgG4-related sclerosing disease involving the kidney as an unusual involvement pattern presenting as a mass-like lesion with pelvic and perirenal involvement.
Immunoglobulin G ; Kidney ; Kidney Diseases* ; Kidney Pelvis ; Lymphocytes ; Lymphoma ; Pancreas* ; Plasma Cells ; Unnecessary Procedures

Upper urinary surgery is an important area of urology surgery. Open surgery used to be the gold standard of upper urinary surgery. With the development of medical techniques, minimal invasive surgeries including laparoscopic and robot assisted-laparoscopic surgery have gradually replaced the open surgery. Because of the complexity and diversity of upper urinary diseases, surgeries sometimes are difficult, and minimal invasive surgeries require higher surgical abilities of urologists than open surgeries. In recent years, depending on our surgical experience and international reports, our team from three Chinese medical centers summarizes techniques of upper urinary minimal invasive surgeries. For malignant diseases, such as renal and ureteral carcinomas, it's important to totally remove the tumor first, and then to avoid the surgical injuries. We summarize surgical experience of retroperitoneal laparoscopic partial nephrectomy for moderately complex renal hilar tumors. Our team modified minimal invasive techniques for some complex tumors, including ring suture technique for renal hilar tumors, internal suspension technique for renal ventral tumors, and combination retroperitoneal laparoscopic surgery with mini-flank incision for complex renal tumors. While for begin diseases, urologists should focus on the resections and surgical injuries at the same time. We have reported the novel technique of laparoscopic aspiration for central renal angiomyolipoma, making the surgery simple and available. For reconstruction surgeries, operations should be based on several principals. We generalize it as "4TB principals", which include "tension-free", "water-tight", "thin suture", "no touch of the key area" and "protecting the blood supply". Depending on the localization, length, and etiology of the strictures, different techniques are required. Our team summarize the pyeloplasty, ureteral reimplantation and ileal ureter replacement based on our surgical experience. For infant upper urinary surgeries, our team has made invasive surgeries that can be used in complex diseases, such as duplex kidney. Based on years of surgical techniques, our modified surgeries achieve a better subjective cosmetic result than the traditional surgeries. In the future, the standardized, practical, simple and individual minimal invasive surgical technique will become the main direction in the future researches.
Humans ; Kidney ; Laparoscopy ; Nephrectomy ; Ureter ; Urologic Surgical Procedures

Minimally invasive surgery (MIS) has been applied to nearly all fields of surgery due to its advantages like reduced morbidity, a better cosmetic outcome and early recovery. The recent advances in its technique have allowed us to use modified MIS technique in the field of kidney transplantation. From January 2004 to Mar 2006, minimally invasive kidney transplantation was carried out in 20 patients. Many clinical variables were compared to the conventional method. The operative procedure began with 7~8 cm skin incision. A laparoscopic balloon dissector was used to create the retroperitoneal space for the placement of the grafted kidney. Vascular anastomosis and ureteroneocystostomy were performed under direct vision and with video-assisted TV monitoring. The average length of the wound was 7.8 cm and it was placed below the belt line. The average operating time was 186 minutes. Less analgesic was given compared to conventional methods. There was one postoperative complication, a mild lymphocele. All patients showed normalized serum creatinine levels within 4 days. All grafted kidneys showed normal findings on the postoperative ultrasound and renal scans. Minimally invasive video-assisted kidney transplantation is technically feasible and may offer benefits in terms of better cosmetic outcomes, less pain and quicker recuperation than conventional kidney transplantation.
Creatinine ; Humans ; Kidney Transplantation* ; Kidney* ; Lymphocele ; Postoperative Complications ; Retroperitoneal Space ; Skin ; Surgical Procedures, Minimally Invasive ; Surgical Procedures, Operative ; Transplants ; Ultrasonography ; Wounds and Injuries

Rudimentary uterus with ipsilateral renal agenesis is a very rare mullerian duct malformation. The unicornuate uterus is a rare type of the anomalous uteri, which is caused by failure of development of one of the mullerian ducts. The most common clinical presentation is pelvic pain and dysmenorrhea shortly after menarche, in associated with the finding of a vaginal or pelvic mass. An appropriate and prompt diagnosis and treatment will prevent unnecessary procedures and offer relief of symptoms. We presented a rare case of a unicornuate uterus with a noncommunicating horn, and ipsilateral renal agenesis with a brief review of concerned literatures.
Animals ; Congenital Abnormalities ; Dysmenorrhea ; Female ; Horns ; Kidney ; Kidney Diseases ; Menarche ; Mullerian Ducts ; Pelvic Pain ; Unnecessary Procedures ; Uterus

PURPOSE: Many operative procedures in pediatric urology can be performed by laparoscopy. We report our experiences with laparoscopic nephrectomy and heminephrectomy and evaluate its usefulness in pediatric patients. MATERIALS AND METHODS: Between August 1996 and December 1997, a total of 10 children aged between 2 and 9 years underwent laparoscopic renal surgeries in Seoul National University Hospital. The laparoscopic nephrectomy (including nephroureterectomy) was performed in 8 patients(4 multicystic kidneys, 2 dysplastic kidneys associated with ectopic ureter, 2 nonfunctioning kidneys associated with vesicoureteral reflux), and heminephrectomy was done in the other 2 patients(duplex kidney). RESULTS: All laparoscopic nephrectomies were completed as planned. Operative time ranged 120 to 300 minutes(mean 180 minutes) and there were no intraoperative or postoperative complications. Oral intake and mobilization were started from postoperative one day and the patients had hospitalized for an average 3.6 days. Laparoscopic heminephrectomy in one patient was performed successfully. Total operative time recorded 240 minutes and there were no intraoperative or postoperative complications. But the other patient experienced bleeding from the injured upper pole artery and subsequent conversion to an open surgery was needed. CONCLUSIONS: Laparoscopic nephrectomy in children is feasible as its morbidity and complication rate are low. Laparoscopic heminephrectomy is thonght to be a technically demanding procedure, requiring more experience.
Arteries ; Child ; Hemorrhage ; Humans ; Kidney ; Laparoscopy ; Multicystic Dysplastic Kidney ; Nephrectomy* ; Operative Time ; Postoperative Complications ; Seoul ; Surgical Procedures, Operative ; Ureter ; Urology

We report a case of laparoendoscopic single-site surgery (LESS) for a symptomatic left seminal vesicular cyst and ipsilateral renal agenesis. A 49-year-old man presented with a 1-year history of severe irritation upon voiding and intractable, recurrent hematospermia. A computed tomography scan showed a 68x41x38 mm sized left seminal vesicular cyst with ipsilateral renal agenesis. LESS was performed successfully to treat the seminal vesicle cyst. The total operative time was 125 minutes, and blood loss was minimal. The patient was discharged from the hospital on the second postoperative day.
Congenital Abnormalities ; Hemospermia ; Humans ; Kidney ; Kidney Diseases ; Laparoscopy ; Middle Aged ; Operative Time ; Seminal Vesicles ; Surgical Procedures, Minimally Invasive

The repair of abdominal aortic aneurysm (AAA) in patients with functioning renal transplant is critical because it is important to avoid ischemic and reperfusion injury to the transplanted kidney. Endovascular aneurysm repair (EVAR) avoids aortic cross clamping and can prevent renal graft ischemia. Here we report the endovascular management and outcome of AAA in two renal transplant patients using a bifurcated aortic stent graft. One patient underwent EVAR using a small amount of contrast (30 mL) due to decreased renal function resulting from chronic rejection. Another patient had EVAR performed with iliac conduit because of the heavily calcified, stenotic lesion of external iliac artery. EVAR in patients with a renal transplant is a feasible option without impairing renal arterial flow.
Aneurysm ; Aortic Aneurysm, Abdominal ; Constriction ; Endovascular Procedures ; Humans ; Iliac Artery ; Ischemia ; Kidney ; Kidney Transplantation ; Rejection (Psychology) ; Reperfusion Injury ; Stents ; Transplants