8 results on '"Hyun Hwan Sung"'
Search Results
2. Biochemical recurrence after radical prostatectomy according to nadir prostate specific antigen value.
- Author
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Jae Hoon Chung, Jae Yong Jeong, Ji Youl Lee, Was Song, Minyong Kang, Hyun Hwan Sung, Hwang Gyun Jeon, Byong Chang Jeong, Seong Il Seo, Hyun Moo Lee, and Seong Soo Jeon
- Subjects
Medicine ,Science - Abstract
The hypersensitive prostate specific antigen (PSA) test can measure in 0.01 ng/mL units, and its efficacy for screening after radical prostatectomy (RP) has been reported. In this study, we assessed patients who underwent RP to evaluate whether the nadir value affects biochemical recurrence (BCR). From 1995 to 2014, patients classified as N0 who had negative resection margins and a nadir PSA of less than 0.2 ng/mL were evaluated. The characteristics, pathological outcomes, PSA after RP, and BCR were assessed. A total of 1483 patients were enrolled. Among them, 323 (21.78%) patients showed BCR after RP. The mean age of the BCR group was 63.86±7.31 years, and while that of the no-recurrence group was 64.06±6.82 years (P = 0.645). The mean preoperative PSA of the BCR group was 9.75±6.92 ng/mL and that of the no-recurrence group was 6.71±5.19 ng/mL (P < 0.001). The mean time to nadir (TTN) in the BCR group was 4.64±7.65 months, while that in the no-recurrence group was 7.43±12.46 months (P < 0.001). The mean PSA nadir value was 0.035±0.034 ng/mL in the BCR group and 0.014±0.009 ng/mL in the no-recurrence group (P < 0.001). In multivariable Cox regression analyses, Gleason score, positive biopsy core percentages, minimal invasive surgery, nadir PSA value, and TTN were independently associated with BCR. The mean BCR occurred at 48.23±2.01 months after RP, and there was a significant difference in BCR occurrence according to the nadir PSA value (P < 0.001). A high PSA nadir value and short TTN may predict the risk of BCR after successful RP, aiding the identification of candidates for adjuvant or salvage therapies after RP.
- Published
- 2021
- Full Text
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3. Comparisons of oncological outcomes and perioperative complications between laparoscopic and open radical nephrectomies in patients with clinical T2 renal cell carcinoma (≥7cm).
- Author
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Hakmin Lee, Chung Un Lee, Jae Ho Yoo, Hyun Hwan Sung, Byong Chang Jeong, Seong Soo Jeon, Hyun Moo Lee, Han-Yong Choi, Chang Wook Jeong, Cheol Kwak, and Seong Il Seo
- Subjects
Medicine ,Science - Abstract
Although minimal invasive techniques have been widely accepted in contemporary urology, the perioperative outcomes of laparoscopy in patients with clinical T2 renal cell carcinoma (RCC) have not been clearly evaluated. We aimed to compare the outcomes of laparoscopic radical nephrectomy (LRN) with those of open radical nephrectomy (ORN) in patients with clinical T2 RCC.We retrospectively analyzed the data of 835 patients who underwent radical nephrectomy for localized clinical T2 RCC (≥7 cm). The survival rates and postoperative complications were compared between the LRN and ORN groups. Multivariate Cox regression tests were performed to identify the independent predictors of each survival outcome.There were 578 (69.2%) subjects in ORN group and 257 (30.8%) in LRN group, respectively. The LRN group showed a significant male predominance (p = 0.013), higher pathological stage (p = 0.02), and higher cellular grade (p = 0.010) compared with the ORN group. No significant differences in progression-free (p = 0.070), cancer-specific (p = 0.472), or overall survival (p = 0.249) were found between the two groups. In the multivariate analysis, the type of surgery did not show any significant associations with all three survival outcomes (all p > 0.2). Furthermore, there was no significant difference in postoperative complication rate between the two groups (p = 0.595). In the subgroup analysis according to tumor histology, no significant relationships were observed between survival outcome and surgery type.The LRN and ORN groups showed similar oncological outcomes in patients with clinical T2 RCC. Early postoperative complications were also comparable between LRN and ORN.
- Published
- 2018
- Full Text
- View/download PDF
4. Diagnostic Ureterorenoscopy Is Associated with Increased Intravesical Recurrence following Radical Nephroureterectomy in Upper Tract Urothelial Carcinoma.
- Author
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Hyun Hwan Sung, Hwang Gyun Jeon, Deok Hyun Han, Byong Chang Jeong, Seong Il Seo, Hyun Moo Lee, Han-Yong Choi, and Seong Soo Jeon
- Subjects
Medicine ,Science - Abstract
Diagnostic ureterorenoscopy is powerful tool to confirm upper tract urothelial cancer (UTUC). However, URS and associated manipulation may be related to the risk of intravesical recurrence (IVR) following radical nephroureterectomy (RNU). We aimed to investigate whether preoperative ureterorenoscopy would increase IVR after RNU in patients with UTUC. We performed a retrospective analysis of 630 patients who had RNU with bladder cuff excision due to UTUC. Diagnostic URS was performed in 282 patients (44.7%). Patients were divided into two groups according to the URS. Survival analysis and multivariate Cox regression model were performed to address risk factors for the IVR. The interval from URS to RNU was measured. During URS, manipulation such as biopsy and resection was determined. The median age was 64 (IQR 56-72) years with follow-up duration of 34.3 (15.7-64.9) months. Median time from URS to RNU was 16 (0-38) days. The IVR developed in 42.5% (n = 268) patients at 8.2 (4.9-14.7) months. The five-year IVR-free survival rate was 42.6 ± 8.0% and 63.6 ± 6.9% in patients with and without preoperative URS, respectively (P < 0.001). In multivariate analysis, previous history of bladder tumour, extravesical excision of distal ureter, multifocal tumour, and URS (HR, 95% CI; 1.558, 1.204-2.016, P = 0.001) were independent predictors for higher IVR. The IVR rate in patients without manipulation during URS was not different to those with manipulation (P = 0.658). The duration from URS to RNU was not associated with IVR (P = 0.799). Diagnostic URS for UTUC increased IVR rate after RNU. However, the lessening of interval from URS to radical surgery or URS without any manipulation could not reduce the IVR rate.
- Published
- 2015
- Full Text
- View/download PDF
5. Trends in the Use of Nephron-Sparing Surgery over 7 Years: An Analysis Using the R.E.N.A.L. Nephrometry Scoring System.
- Author
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Seung Jea Shin, Kwang Jin Ko, Tae Sun Kim, Hyun Soo Ryoo, Hyun Hwan Sung, Hwang Gyun Jeon, Byong Chang Jeong, Seong Il Seo, Hyun Moo Lee, Han Yong Choi, and Seong Soo Jeon
- Subjects
Medicine ,Science - Abstract
To analyze trends in the use of partial nephrectomy, we evaluated which individual factors of renal nephrometry score (RNS) influenced the operative approach bi-annually from 2008 to 2014.We performed a retrospective review of renal cell carcinoma treated by surgery in 2008, 2010, 2012, and 2014. The complexity of renal masses was measured using the R.E.N.A.L. nephrometry scoring system with CT or MRI. Group comparison in terms of operation year and surgical type (partial nephrectomy versus radical nephrectomy) was performed. We developed a nomogram to quantitate the likelihood of selecting partial nephrectomy over radical nephrectomy.A total of 1106 cases (237 in 2008, 225 in 2010, 292 in 2012, and 352 in 2014) were available for the study. Over the study period, the proportion of partial nephrectomies performed increased steadily from 21.5% in 2008 to 66.5% in 2014 (p < 0.05). Furthermore, use of partial nephrectomy increased steadily in all RNS complexity groups (low, moderate, and high) (p < 0.05). In the analysis of individual components of RNS, values of the R and N components increased statistically by year in the partial nephrectomy group (p < 0.05). Average AUC was 0.920.The proportion of partial nephrectomies performed sharply increased over the study period. Additionally, over the study period, more partial nephrectomies were performed for renal masses of larger size and closer to the collecting system and main renal vessels. A nomogram developed based on this recent data set provides significant predictive value for surgical decision making.
- Published
- 2015
- Full Text
- View/download PDF
6. Biochemical recurrence after radical prostatectomy according to nadir prostate specific antigen value
- Author
-
Minyong Kang, Jae Hoon Chung, Hyun Hwan Sung, Jae Yong Jeong, Seong Soo Jeon, Hwang Gyun Jeon, Was Song, Hyun Moo Lee, Ji Youl Lee, Seong Il Seo, and Byong Chang Jeong
- Subjects
Male ,Epidemiology ,medicine.medical_treatment ,Cancer Treatment ,Prostate cancer ,Endocrinology ,Medical Conditions ,Postoperative Complications ,hemic and lymphatic diseases ,Medicine and Health Sciences ,Multidisciplinary ,medicine.diagnostic_test ,Prostatectomy ,Prostate Cancer ,Cancer Risk Factors ,Prostate Diseases ,breakpoint cluster region ,Middle Aged ,Prostate-specific antigen ,Surgical Oncology ,Oncology ,Medicine ,Anatomy ,Nadir (topography) ,Research Article ,Clinical Oncology ,Biochemical recurrence ,medicine.medical_specialty ,Endocrine Disorders ,Urology ,Science ,Surgical and Invasive Medical Procedures ,Minimally Invasive Surgery ,Exocrine Glands ,Biopsy ,Diabetes Mellitus ,medicine ,Humans ,Aged ,Proportional hazards model ,business.industry ,Cancers and Neoplasms ,Biology and Life Sciences ,Prostatic Neoplasms ,Prostate-Specific Antigen ,medicine.disease ,Genitourinary Tract Tumors ,Medical Risk Factors ,Metabolic Disorders ,Prostate Gland ,Clinical Medicine ,business - Abstract
The hypersensitive prostate specific antigen (PSA) test can measure in 0.01 ng/mL units, and its efficacy for screening after radical prostatectomy (RP) has been reported. In this study, we assessed patients who underwent RP to evaluate whether the nadir value affects biochemical recurrence (BCR). From 1995 to 2014, patients classified as N0 who had negative resection margins and a nadir PSA of less than 0.2 ng/mL were evaluated. The characteristics, pathological outcomes, PSA after RP, and BCR were assessed. A total of 1483 patients were enrolled. Among them, 323 (21.78%) patients showed BCR after RP. The mean age of the BCR group was 63.86±7.31 years, and while that of the no-recurrence group was 64.06±6.82 years (P = 0.645). The mean preoperative PSA of the BCR group was 9.75±6.92 ng/mL and that of the no-recurrence group was 6.71±5.19 ng/mL (P < 0.001). The mean time to nadir (TTN) in the BCR group was 4.64±7.65 months, while that in the no-recurrence group was 7.43±12.46 months (P < 0.001). The mean PSA nadir value was 0.035±0.034 ng/mL in the BCR group and 0.014±0.009 ng/mL in the no-recurrence group (P < 0.001). In multivariable Cox regression analyses, Gleason score, positive biopsy core percentages, minimal invasive surgery, nadir PSA value, and TTN were independently associated with BCR. The mean BCR occurred at 48.23±2.01 months after RP, and there was a significant difference in BCR occurrence according to the nadir PSA value (P < 0.001). A high PSA nadir value and short TTN may predict the risk of BCR after successful RP, aiding the identification of candidates for adjuvant or salvage therapies after RP.
- Published
- 2020
7. Comparisons of oncological outcomes and perioperative complications between laparoscopic and open radical nephrectomies in patients with clinical T2 renal cell carcinoma (≥7cm)
- Author
-
Hyun Hwan Sung, Byong Chang Jeong, Chung Un Lee, Chang Wook Jeong, Hakmin Lee, Seong Soo Jeon, Jae Ho Yoo, Hyun Moo Lee, Seong Il Seo, Han Yong Choi, and Cheol Kwak
- Subjects
Male ,medicine.medical_treatment ,Cancer Treatment ,030232 urology & nephrology ,lcsh:Medicine ,Nephrectomy ,Postoperative Complications ,0302 clinical medicine ,Animal Cells ,Renal cell carcinoma ,Medicine and Health Sciences ,Radical Nephrectomy ,lcsh:Science ,Laparoscopy ,Neurons ,Multidisciplinary ,medicine.diagnostic_test ,Laparoscopic Nephrectomy ,Middle Aged ,Kidney Neoplasms ,Surgical Oncology ,Oncology ,Nephrology ,Renal Cancer ,030220 oncology & carcinogenesis ,Female ,Cellular Types ,Research Article ,Clinical Oncology ,medicine.medical_specialty ,Urology ,Surgical and Invasive Medical Procedures ,Carcinomas ,Olfactory Receptor Neurons ,Urinary System Procedures ,03 medical and health sciences ,Carcinoma ,medicine ,Humans ,Carcinoma, Renal Cell ,Proportional Hazards Models ,Retrospective Studies ,Surgical Excision ,Proportional hazards model ,business.industry ,lcsh:R ,Renal Cell Carcinoma ,Biology and Life Sciences ,Afferent Neurons ,Cancers and Neoplasms ,Postoperative complication ,Retrospective cohort study ,Cell Biology ,Perioperative ,medicine.disease ,Genitourinary Tract Tumors ,Cross-Sectional Studies ,Cellular Neuroscience ,Multivariate Analysis ,lcsh:Q ,Clinical Medicine ,business ,Neuroscience - Abstract
Purpose Although minimal invasive techniques have been widely accepted in contemporary urology, the perioperative outcomes of laparoscopy in patients with clinical T2 renal cell carcinoma (RCC) have not been clearly evaluated. We aimed to compare the outcomes of laparoscopic radical nephrectomy (LRN) with those of open radical nephrectomy (ORN) in patients with clinical T2 RCC. Methods We retrospectively analyzed the data of 835 patients who underwent radical nephrectomy for localized clinical T2 RCC (≥7 cm). The survival rates and postoperative complications were compared between the LRN and ORN groups. Multivariate Cox regression tests were performed to identify the independent predictors of each survival outcome. Results There were 578 (69.2%) subjects in ORN group and 257 (30.8%) in LRN group, respectively. The LRN group showed a significant male predominance (p = 0.013), higher pathological stage (p = 0.02), and higher cellular grade (p = 0.010) compared with the ORN group. No significant differences in progression-free (p = 0.070), cancer-specific (p = 0.472), or overall survival (p = 0.249) were found between the two groups. In the multivariate analysis, the type of surgery did not show any significant associations with all three survival outcomes (all p > 0.2). Furthermore, there was no significant difference in postoperative complication rate between the two groups (p = 0.595). In the subgroup analysis according to tumor histology, no significant relationships were observed between survival outcome and surgery type. Conclusion The LRN and ORN groups showed similar oncological outcomes in patients with clinical T2 RCC. Early postoperative complications were also comparable between LRN and ORN.
- Published
- 2018
8. Diagnostic Ureterorenoscopy Is Associated with Increased Intravesical Recurrence following Radical Nephroureterectomy in Upper Tract Urothelial Carcinoma
- Author
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Deok Hyun Han, Seong Il Seo, Hwang Gyun Jeon, Byong Chang Jeong, Hyun Hwan Sung, Seong Soo Jeon, Han Yong Choi, and Hyun Moo Lee
- Subjects
Male ,medicine.medical_specialty ,medicine.medical_treatment ,lcsh:Medicine ,Kaplan-Meier Estimate ,Preoperative care ,Nephrectomy ,Disease-Free Survival ,Ureter ,Neoplasm Seeding ,Risk Factors ,Preoperative Care ,medicine ,Ureteroscopy ,Humans ,Radical surgery ,lcsh:Science ,Ureteral neoplasm ,Survival rate ,Aged ,Proportional Hazards Models ,Retrospective Studies ,Carcinoma, Transitional Cell ,Multidisciplinary ,Bladder cancer ,medicine.diagnostic_test ,business.industry ,Ureteral Neoplasms ,lcsh:R ,Middle Aged ,medicine.disease ,Surgery ,medicine.anatomical_structure ,Urinary Bladder Neoplasms ,lcsh:Q ,Female ,Neoplasm Recurrence, Local ,business ,Research Article - Abstract
Diagnostic ureterorenoscopy is powerful tool to confirm upper tract urothelial cancer (UTUC). However, URS and associated manipulation may be related to the risk of intravesical recurrence (IVR) following radical nephroureterectomy (RNU). We aimed to investigate whether preoperative ureterorenoscopy would increase IVR after RNU in patients with UTUC. We performed a retrospective analysis of 630 patients who had RNU with bladder cuff excision due to UTUC. Diagnostic URS was performed in 282 patients (44.7%). Patients were divided into two groups according to the URS. Survival analysis and multivariate Cox regression model were performed to address risk factors for the IVR. The interval from URS to RNU was measured. During URS, manipulation such as biopsy and resection was determined. The median age was 64 (IQR 56-72) years with follow-up duration of 34.3 (15.7-64.9) months. Median time from URS to RNU was 16 (0-38) days. The IVR developed in 42.5% (n = 268) patients at 8.2 (4.9-14.7) months. The five-year IVR-free survival rate was 42.6 ± 8.0% and 63.6 ± 6.9% in patients with and without preoperative URS, respectively (P < 0.001). In multivariate analysis, previous history of bladder tumour, extravesical excision of distal ureter, multifocal tumour, and URS (HR, 95% CI; 1.558, 1.204-2.016, P = 0.001) were independent predictors for higher IVR. The IVR rate in patients without manipulation during URS was not different to those with manipulation (P = 0.658). The duration from URS to RNU was not associated with IVR (P = 0.799). Diagnostic URS for UTUC increased IVR rate after RNU. However, the lessening of interval from URS to radical surgery or URS without any manipulation could not reduce the IVR rate.
- Published
- 2015
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