Journal of Yeungnam Medical Science

Ki Hak Moon

9 Articles

A Case of Bladder Stone and Vesicovaginal Fistula after McDonald Operation.: Chang Jun Yoon, Ki Hak Moon, Hee Chang Jung; Yeungnam Univ J Med. 2006;23(1):108-112. Published online June 30, 2006; DOI: https://doi.org/10.12701/yujm.2006.23.1.108

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Abstract PDF: The frequency of a bladder foreign body in the female is lower than in the male, and bladder stones attached to foreign bodies such as non-absorbable suture material are not common. Moreover, vesicovaginal fistulas due to migration or puncture of suture materials into the bladder are rare. In this report, we present a case of bladder stone and vesicovaginal fistula formation in a 29-year-old female patient who had been treated with the McDonald operation for an incompetent internal os of the cervix (IIOC) during pregnancy. The patient was successfully treated by cystoscopic removal of the bladder stone with suture material and conservative treatment for the vesicovaginal fistula.

Intratesticular Simple cyst lined by ciliated columnar epithelium: A Case Report.: Ji Yoon Kim, Hwa Soo Lim, Ki Hak Moon, Mi Jin Kim, Jae Ho Cho; Yeungnam Univ J Med. 2005;22(2):266-269. Published online December 31, 2005; DOI: https://doi.org/10.12701/yujm.2005.22.2.266

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Abstract PDF: An intratesticular simple cyst is a rare lesion. The pathogenesis of such lesions is uncertain. Clinically, an intratesticular simple cyst may be difficult to differentiate from a cystic neoplasm. However, preoperative diagnosis is possible using ultrasonography (US). Testis-sparing surgery with simple enucleation of the cyst has a favorable outcome. We report an intratesticular simple cyst in a 48-year-old male who had a non-tender cystic mass in the right testis for 2 years. The diagnosis was made by preoperative US. The patient underwent a testis-sparing surgery. After simple excision of the cyst, histological examination revealed a simple cyst lined by ciliated cuboidal and columnar epithelium.

Association between Obesity and Prostate Cancer.: Chang Jun Yoon, Ki Hak Moon, Tong Choon Park; Yeungnam Univ J Med. 2005;22(2):199-210. Published online December 31, 2005; DOI: https://doi.org/10.12701/yujm.2005.22.2.199

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Abstract PDF: BACKGROUND
The role of obesity in prostate cancer etiology remains controversial. The aim of this study was to evaluate the relationship between obesity and prostate cancer risk. MATERIALS AND METHODS: Between January 2000 and June 2005, 286 patients suspected of having prostate cancer underwent prostate biopsy. The clinical records of the 286 study patients were retrospectively reviewed with regard to age, Body Mass Index (BMI), serum PSA, TRUS, and prostate biopsy results. They were stratified by BMI into three groups according to the cutoffs recommended for Asian populations: normal, BMI less than 23 kg/m2; overweight, BMI 23 to 25 kg/m2; and obese, BMI greater than 25 kg/m2. RESULTS: As for BMIs, 132 (46.2%) were normal, 95 (33.2%) overweight and 59 (20.6%) were obese. A total of 99 (34.6%) patients were diagnosed as having prostate cancer. In multivariate logistic regression analyses, no significant association was observed between BMI and prostate cancer detection. CONCLUSION: We initially hypothesized that obesity may be biologically associated with increased prostate cancer development. However, our study did not show a significant association between BMI and prostate cancer.

Clinical Outcome of Ureteropelvic Junction Obstruction in the Pediatric and Adult Population.: Phill Hyun Song, Sang Taek Kwon, Ji Hyun Yeo, Yong Hoon Park, Ki Hak Moon; Yeungnam Univ J Med. 2004;21(1):67-73. Published online June 30, 2004; DOI: https://doi.org/10.12701/yujm.2004.21.1.67

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Abstract PDF: BACKGROUND
A ureteropelvic junction (UPJ) obstruction is a congenital anomaly commonly afflicting the pediatric population. However, it occurs more frequently in adults than is generally appreciated. To assess their characteristics, we have here compared and analyzed the clinical manifestations, causes, and outcomes of UPJ obstruction found in children and adults. MATERIALS AND METHODS: 102 patients (118 renal units) out of 182 patients (218 renal units), with diagnosed UPJ obstruction, were available for follow up. The follow-ups were retrospectively reviewed to determine the presenting symptoms, treatments, and clinical outcomes. Patients who were younger than 18 years of age were assigned to the pediatric group (44 patients), others the adult group (58 patents). RESULTS: The majority of the patients presented with flank pain (pediatric group: 68%, adult group: 76%). The majority of patients underwent a pyeloplasty (pediatric group: 50.9%, adult group: 62.3%). And the major cause of the UPJ obstruction was an intrinsic stenosis (pediatric group: 53%, adult group: 56%). CONCLUSION: The prevalence of bilateral UPJ obstruction in adults is evidently less prevalent than in pediatrics, and despite the late diagnosis, the surgical outcome is similar. A further investigation of UPJ obstruction will lead us to a more comprehensive understanding of the disease.

A Case of Bilateral Testicular Teratoma Found in Infant.: Un Gi Baek, Seok Young Chung, Woo Seok Choi, Phil Hyun Song, Chul Kyu Cho, Ki Hak Moon, Dong Sug Kim; Yeungnam Univ J Med. 2003;20(1):92-98. Published online June 30, 2003; DOI: https://doi.org/10.12701/yujm.2003.20.1.92

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Abstract PDF: Testicular teratoma is characterized that has more than one germ cell layer in various stages of maturation and differentiation. The incidence of mature teratoma varies from 2 to 9% of all germinal testicular tumor. Only 3 cases of bilateral teratoma have been reported in the literature to date. The teratoma can occurs at all ages but is most common between the age of 15-35 year. It is relatively infrequently seen in childhood and infancy. In these age group, teratoma tends to be a benign. Recently, we experienced one case of bilateral testicular teratoma in 4 month-old infancy. We report a case of bilateral testicular teratoma found infancy with review of related literatures.

Clinical Experience of Nephron Sparing Surgery for Renal Tumor with a Normal Opposite Kidney.: Jun Young Lee, Jung Hyun Kim, Kang Min Lee, Ki Hak Moon, Hee Chang Jung, Tong Choon Park; Yeungnam Univ J Med. 1999;16(1):94-100. Published online June 30, 1999; DOI: https://doi.org/10.12701/yujm.1999.16.1.94

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Abstract PDF: The aims of this retrospective study were to determine whether a nephron sparing surgery might be feasible in patients with a small solid renal tumor. Materials and methods: Between 1988 and 1999, 21 patients with radiologically detectable small solid renal tumor underwent enucleoresection, wedge resection and polar segmental nephrectomy. The mean age of the 11 men and 10 women in this study was 43 years (range 14 to 68). According to the preoperative radiological diagnosis, 15 among the 21 patients were considered to have renal cell carcinoma, 4 were considered to have angiomyolipoma, and the remaining 2 patients were difficult to differentiate as renal tumors radiologically. Among 15 patients considered to have renal cell carcinoma, 14 were found to have renal cell carcinoma and the remaining one patient was diagnosed as having oncocytoma on pathologic examination. Radiological determination of angiomyolipoma in four patients was confirmed to be correct on pathological examination. The 2 patients whose radiological diagnose wasdificult were founf to have cavernous hemangioma and angiomyolipoma. One patient with renal cell carcinoma developed arteriocaliceal fistula, the only immediate complication in this series, and underwent nephrectomy on postoperative 10th day. The mean follow-up duration for the 14 patients with renal cell carcinoma was 18.6 months(range:1-103). There were no other tumor involvement in the resection margins following the nephron sparing surgery. These results suggest that nephron sparing surgery provides an effective treatment for patients with a single, small, unilateral, localized renal tumor. Longer follow-up is suggested for more definite verification of the role of nephron sparing surgery.

Comparison OF Northgate SD-3 and Modulith SLX Lithotriptors: Treatment Results with 2,000 Renal and Ureteral Stones.: Jun Young Lee, Hee Chang Jung, Ki Hak Moon, Chul Kyu Cho, Tong Choon Park; Yeungnam Univ J Med. 1999;16(1):85-93. Published online June 30, 1999; DOI: https://doi.org/10.12701/yujm.1999.16.1.85

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Abstract PDF: Some reports have shown a decreased effectiveness of extracorporeal shock wave lithotripsy(ESWL) with newer lithotriptors. We compared the treatment results of ESWL with a second generation Northgate SD-3 and a third generation Modulith SLX device. A total of 2,000 patients underwent ESWL treatments for single urinary calculus between September, 1988 and July, 1998. The 1,241 patients were treated with Northgate SD-3 between September, 1988 and December, 1995. The 759 patients were treated with Modulith SLX between January, 1996 and July 1998. The treatment results were compared using the chi-square test to determine statistical significance. The overall success rate, success rate according to the location and size, the mean number of sessions, complication rate and retreatment rate were obtained, according to lithotriptor. The overall success rate was 90.6% with Northgate SD-3 and 89.1% with Modulith SLX. With Northgate SD-3 and modulith SLX. the success rate according to the location was 91.0%(579/636), 88.1%(236/268) in the kidney, 93.2%(517/555), 89.9%(258/287) in upper ureter; 83.3%(10/12) and 94.4%(167/177) in middle and lower ureter; 47.4%(18/38) and 55.6%(15/27) in staghorn stone, respectively, The success rate According to the size of stone with Northgate SD-3 and Modulith SLX for stone with the size under 10mm was 96.1% (612/637) and 93.1%(470/505); from 11mm to 20mm was 87.3%(421/482) and 86.4%(165/191); from 21mm to 30mm, 77.5%(62/80) and 67.5%(23/34); and for stone larger then 31mm was 69%(29/42) and 62.1%(18/29), respectively, Mean number of sessions for successful fragmentation was 1.21 and 1.69, respectively, with Northgate SD-3 and Modulith SLX. Retreatment rate was 16.7% and 17.5%, respectively. The complications after treatment were severe pain(6.2% with Northgate SD-3 vs. 2.0% with Modulith SLX), steinstrasse(3.4% vs. 1.9%), fever(1.2% vs. 0.5%) and perirenal hematoma(0.2% vs. 0%) in order of frequency. There was no significant difference in the effectiveness between of Northgate SD-3 and Modulith SLX. However, a statistically significant difference was observed between the two lithotriptors. We concluded that ESWL with Modulith SLX is more safe compared to Northgate SD-3.

Four Cases of Foreign Body in Lower Urinary Tract.: Jin Wook Yoo, Ki Hak Moon, Hee Chang Jung, Tong Choon Park; Yeungnam Univ J Med. 1998;15(2):391-396. Published online December 31, 1998; DOI: https://doi.org/10.12701/yujm.1998.15.2.391

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Abstract PDF: Foreign bodies in genitourinary tract are common and almost of then are within the bladder. These foreign bodies were inserted or applied for autoerotic, psychiatric, therapeutic, or no definite reasons by the patient. Foreign bodies(a thermometer and a piece of cloth) in the bladder were inserted as a mean of masturbation in two cases, and a cooper wire in the posterior urethra was introduced by iatrogenic causes in one case. In one case, four magnets were inserted into the bladder for the purpose of forceful penile erection. Clinical history, symptom, radiologic study, and endoscopic examination were required to diagnose foreign body. They were easily removed by endoscopic manipulation or open surgical procedure.

Early Clinical Experience with Transurethral Electrovaporization of the Prostate for Benign Prostatic Hyperplasia: Comparison with Transurethral Resection of the Prostate and Visual Laser Ablation of the Prostate.: Jung Hyun Kim, Ki Hak Moon, Hee Chang Jung, Tong Choon Park; Yeungnam Univ J Med. 1998;15(2):297-305. Published online December 31, 1998; DOI: https://doi.org/10.12701/yujm.1998.15.2.297

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Abstract PDF: Recently, several alternatives have been attempted in the management of benign prostatic hyperplasia (BPH) to reduce morbidity of traditional transurethral resection of the prostate (TURP). Among new modalities, transurethral electrovaporization (TEVP) is considered as a promising alternative. To evaluate the safety and initial efficacy of TEVP using the roller loop electrode (ProSurg Inc. USA) on BPH patients, we compared the results of TEVP with those of TURP and visual laser ablation of the prostate (VLAP). In this study, a total of 115 patients with symptomatic BPH were underwent TEVP (n=17), TURP (n=59) or VLAP (n=39) since 1995. Before treatment, patients were evaluated with an International Prostate Symptom Score (IPSS) and the measurement of maximal uroflow rate (MFR) and postvoid residual urine (PVR). After treatment, the operative and hospital records were reviewed. The uroflowmetry and IPSS were re-evaluated 3-10 months after treatment. In clinical outcome of re-evaluation compared to the preoperative parameters, there was a clinically significant improvement in three procedures. TEVP resulted in 62% reduction in IPSS (TURP, 73% : VLAP, 69%), 84% improvement in MFR (TURP, 113% : VLAP, 91%), and 74% reduction in PVR (TURP, 88% : VLAP, 78%). TEVP had shorter duration of hospitalization and catheterization than the others. TEVP was associated with lower rates of treatment-related complication than TURP. In conclusions, TEVP is considered as a useful procedure to treat symptomatic BPH. And, the advantages of TEVP over TURP include excellent intraoperative hemostasis, lower morbidity, shorter hospital stay and simple technique. In addition to this, the advantages over VLAP include lower cost, shorter duration of catheterization and early symptom improvement.

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