Renal Cell Carcinoma: Clinical, Radiologic and Pathologic Characteristics / 대한비뇨기과학회지

Cystic renal cell carcinoma includes any malignant neoplasm of renal tubular epithelium which presents as fluid-filled mass. We reviewed 11 patients of cystic renal cell carcinoma to identify the clinical radiologic and pathologic characteristics of the tumor. The clinical feature of cystic renal cell carcinoma was similar to those which are solid. There are four basic pathologic mechanisms resulting in cystic renal cell carcinoma :intrinsic multiloculated growth (3 patients), intrinsic unilocular growth (1 patient), cystic necrosis (6 patients), and origin from the epithelial lining of a preexisting simple cyst (1 patient). There are three basic radiologic patterns of cystic renal cell carcinoma :unilocular cystic mass (6 patients), multiloculated cystic mass (3 patients), and discrete mural nodule in a cystic mass (2 patients).

The Meaning of the Initial Drop in Canine Intracorporal Pressure During Erection / 대한비뇨기과학회지

Most investigators now agree that active relaxation of smooth muscles of both the cavernous sinusoids and arterial tree take place concomitantly under neural control during erection. Recently we isolated and stimulated the cavernous nerves in 12 dogs. In 7 dogs which erection could be induced we measured the intracorporal pressure change during erection. In 2 dogs we observed initial drop in the intracorporal pressure for 14 to 20 seconds followed by a rise above prestimulation line, that had not been reported by other investigators. To evaluate the meaning of the initial drop in intracorporal pressure we review our clinical investigation and the state of knowledge of local hemodynamics of erection. Now we propose a new theory about the mechanism that control penile arterial smooth muscle. The relaxation of penile arterial smooth muscle seems to be a secondary reactive response for adjusting to blood requirement after relaxation of the smooth muscle of the cavernous smooth muscle. Secondary reactive response means non neurogenic autoregulation. We propose myogenic theory or non neurogenic, flow induced, endothelium-dependent relaxation as the mechanism of autoregulation for penile arterial flow.

Ureteropelvic Junction Obstruction in Children : Diagnosis and Management / 대한비뇨기과학회지

We reviewed the clinical courses and surgical results of 32 children with ureteropelvic junction obstruction since June, 1985. Major presenting features were abdominal mass and urinary infection in children less then 3 years old and pain was the most frequent presenting symptom in older children. Five children had bilateral involvement. Thirty two pyeloplasties and four nephrectomies were done in 36 renal units. Preoperatively six children had been managed with percutanous nephrostomy due to pyonephrosis, azotemia and marginal renal function. Radiographic and/or functional improvement were recognized in 30 kidneys(94%) In solitary kidney, bilateral involvement, severe infection and redo case, stent and/or nephrostomy applied. Neither stent nor nephrostomy was used in 25 operations and the results were satisfactory in all. Urinary infection might have affected the surgical results inspite of preoperative control. Postoperatively transient urinary leakage developed in 4 children and bacteriuria in 11 but disappeared soon. Excretory urography was performed in all and was enough to diagnose in most patients but in recent period we evaluated the ultrasound study and radioisotope renal scan. We feel these methods are satisfactory in the diagnosis and follow-up of UPJ obstruction and IVP is not always mandatory.

Ureteropelvic Junction Obstruction in Children : Diagnosis and Management / 대한비뇨기과학회지

We reviewed the clinical courses and surgical results of 32 children with ureteropelvic junction obstruction since June, 1985. Major presenting features were abdominal mass and urinary infection in children less then 3 years old and pain was the most frequent presenting symptom in older children. Five children had bilateral involvement. Thirty two pyeloplasties and four nephrectomies were done in 36 renal units. Preoperatively six children had been managed with percutanous nephrostomy due to pyonephrosis, azotemia and marginal renal function. Radiographic and/or functional improvement were recognized in 30 kidneys(94%) In solitary kidney, bilateral involvement, severe infection and redo case, stent and/or nephrostomy applied. Neither stent nor nephrostomy was used in 25 operations and the results were satisfactory in all. Urinary infection might have affected the surgical results inspite of preoperative control. Postoperatively transient urinary leakage developed in 4 children and bacteriuria in 11 but disappeared soon. Excretory urography was performed in all and was enough to diagnose in most patients but in recent period we evaluated the ultrasound study and radioisotope renal scan. We feel these methods are satisfactory in the diagnosis and follow-up of UPJ obstruction and IVP is not always mandatory.

Posterior Lumbotomy Approach in Pyeloplasty / 대한비뇨기과학회지

Since January 1986, we have performed 25 dismembered pyeloplasties on 20 children with ureteropelvic junction obstruction. The posterior lumbotomy approach was used in 11 cases and their intraoperative course and postoperative status were compared to those who had operation through the standard flank incision. The surgical steps are described and the limitations of this approach are discussed.

Urethral Trauma -Clinical Experience of Visual Urethrotomy on Urethral Stricture- / 대한비뇨기과학회지

A clinical evaluation has been undertaken of 41 patients with urethral stricture who have been treated with visual urethrotomy in the Department of Urology, Seoul National University Hospital during 3 years periods from 1983 to 1985. The over all success rate was 54%. The results were unrelated to the sites of the lesion, the causes of the stricture and the durations of the catheter drainage. However, the results of the obliterated strictures (12.5%) are more poor than the non-obliterated strictures (64%), and patients with nonobliterated stricture less than 2cm long had the best results (22%). The overall morbidity rate was 20%, six cases of false way, one case of incontinence, one case of penile hematoma. Twenty seven cases were followed up over 6 months and its success rate showed 44.4%.