Publications by authors named "Jang H Han"

Introduction: We evaluated the prognostic potential of the Beta-human chorionic gonadotropin (β-hCG), Carbohydrate Antigen 19-9 (CA19-9), Cancer Antigen 125 (CA125), and Carcinoembryonic Antigen (CEA) tumor markers for bladder cancer.

Methods: We analyzed the records of 369 patients who underwent radical cystectomy for urothelial cancer (UC) between October 2012 until December 2019. Levels of CA19-9, CA125, CEA, and β-hCG before radical cystectomy were measured in all patient samples, and serum biomarker cutoff values were used as normal and elevated values.

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Background: The effect of anesthesia methods on non-muscle invasive bladder cancer (NMIBC) recurrence post-resection remains uncertain. We aimed to compare the oncological outcomes of spinal anesthesia (SA) and general anesthesia (GA) in patients with NMIBC.

Methods: This prospective randomized controlled trial recruited 287 patients with clinical NMIBC at Seoul National University Hospital from 2018 to 2020.

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  • - The study compared the effectiveness and safety of Monofix-PDO and V-Loc™ for suturing tumor beds during robotic-assisted laparoscopic partial nephrectomy in a randomized trial involving 174 patients across four institutions.
  • - Results showed no significant differences in resection bed suture time or other secondary outcomes (like total suture time and warm ischemia time) between the two groups, indicating both methods are equally effective.
  • - Both techniques were found safe, with no adverse events reported during the 90-day follow-up, and Monofix-PDO was confirmed to be non-inferior to V-Loc™ in clinical performance.
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Background: In patients with metastatic renal cell carcinoma (mRCC), sites of metastatic involvement have been reported to be associated with a difference in survival. However, the frequency and survival according to different sites of metastases in Korean patients with mRCC remain unclear. Therefore, this study aimed to assess the frequency of metastatic site involvement and the association between sites of metastatic involvement and survival in Korean patients with mRCC.

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  • * PLGA nanoparticles are commonly used for drug delivery but face challenges in controlling size and release, especially when encapsulating negatively charged nucleic acids.
  • * This study improves nucleic acid encapsulation using negatively charged microbeads, tests a prostate cancer model with PSMA-617-conjugated PLGA nanoparticles, and suggests a novel method for customizing cancer treatments.
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A 65-year-old woman was diagnosed with an 8 cm large common bile duct stone and multiple stones in both intrahepatic ducts because of abnormal liver function tests. After a multidisciplinary approach, surgical removal was considered, and primary closure after laparoscopic removal of the common bile duct stone was performed. The patient recovered without complications and was discharged on the fourth postoperative day.

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CRISPR/Cas9 technology has effectively targeted cancer-specific oncogenic hotspot mutations or insertion-deletions. However, their limited prevalence in tumors restricts their application. We propose a novel approach targeting passenger single nucleotide variants (SNVs) in haploinsufficient or essential genes to broaden therapeutic options.

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Background: In the United States, the rate of benign histology among resected renal tumors suspected to be malignant is increasing. We evaluated the rates in the Republic of Korea and assessed the racial effect using recent multi-institutional Korean-United States data.

Methods: We conducted a multi-institutional retrospective study of 11,529 patients (8,812 from The Republic of Korea and 2,717 from the United States) and compared the rates of benign histology between the two countries.

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Background: The polygenic risk score (PRS) is used to predict the risk of developing common complex diseases or cancers using genetic markers. Although PRS is used in clinical practice to predict breast cancer risk, it is more accurate for Europeans than for non-Europeans because of the sample size of training genome-wide association studies (GWAS). To address this disparity, we constructed a PRS model for predicting the risk of renal cell carcinoma (RCC) in the Korean population.

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  • The study examined the effectiveness of confirmatory bone scans in men with metastatic castration-resistant prostate cancer (mCRPC) undergoing enzalutamide treatment.
  • It included 520 patients from 14 centers in Korea, where 26.1% of responders showed new bone lesions, and confirmatory scans were linked to longer overall survival (OS).
  • The findings suggest that confirmatory bone scans are crucial for predicting patient outcomes, and discontinuing enzalutamide without them is discouraged.
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  • - The study investigates a new laparoscopic approach to renal denervation (RDN) and its effects on reducing atrial fibrillation (AF) episodes in pigs.
  • - Swine were divided into groups to assess changes in atrial effective refractory period (AERP) and AF inducibility after RDN compared to a sham procedure, with vagal nerve stimulation (VNS) also tested.
  • - Results showed that laparoscopic RDN significantly increased AERP and decreased both the inducibility and duration of AF episodes, suggesting its potential effectiveness for future cardiac treatments.
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Purpose: To investigate if increased tubular damage biomarker can predict pathologically upstaged renal cell carcinoma (RCC), which may possess sub-radiologic invasive behavior, leading to surrounding tubular damage.

Materials And Methods: We examined 1563 patients with surgically resected RCC between March 2016 and June 2021 from the prospective database SUPER-RCC-Nx. Exclusion criteria were cancer not originating from the kidneys, benign renal tumor, and end-stage renal disease.

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  • The study investigates the prognostic significance of lymphatic invasion in prostate cancer, particularly its relationship with biochemical recurrence (BCR) rates in patients who underwent radical prostatectomy (RP) with or without pelvic lymph node dissection (PLND).
  • Researchers analyzed data from 2,207 patients without PLND and 742 with PLND, finding that lymphatic invasion occurred in 3.5% of patients without lymph node metastasis, while 47.6% of patients with metastasis had lymphatic invasion.
  • Results showed that patients with lymphatic invasion had significantly poorer BCR-free survival compared to those without, but there was no notable survival difference between patients with lymphatic invasion and
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Although there are several decision aids for the treatment of localized prostate cancer (PCa), there are limitations in the consistency and certainty of the information provided. We aimed to better understand the treatment decision process and develop a decision-predicting model considering oncologic, demographic, socioeconomic, and geographic factors. Men newly diagnosed with localized PCa between 2010 and 2015 from the Surveillance, Epidemiology, and End Results Prostate with Watchful Waiting database were included (n = 255,837).

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  • A study was conducted on 743 patients who underwent radical nephroureterectomy (RNUx) for upper tract urothelial carcinoma (UTUC) to assess pyuria as a potential predictor of intravesical recurrence (IVR).
  • Results showed that patients with pyuria had a significantly shorter IVR-free survival rate (49.7%) compared to those without pyuria (60.0%), with pyuria identified as an independent predictor of IVR (HR=1.368).
  • Other factors contributing to IVR risk included concurrent bladder tumors, preoperative ureteroscopy, laparoscopic surgery, tumor multiplicity, and larger tumor size; however, pyuria showed no correlation with
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Purpose: Contemporary treatment strategies for localized prostate cancer (PCa) have been evolved over time. However, there is little data regarding survival outcomes based on initial treatment by risk group in this new era. This study aims to evaluate survival outcomes among men who underwent observation, radiotherapy, or radical prostatectomy for localized PCa using a population-based cohort.

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Background: Clear cell papillary renal cell tumor (CCPRCT) was first reported in 2006 a patient with end stage renal disease. After that it was discovered in the kidney without end stage renal disease in the 2010s and started to be mentioned in pathology and urology. The incidence of CCPRCT is low and most of it is discovered incidentally, so there is a lack of reports on clinical characteristics and surgical outcome.

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Background: Previous studies using the Vesical Imaging Reporting and Data System (VI-RADS) to predict muscle-invasive bladder cancer (MIBC) had some limitations. Most studies were performed with transurethral resection of bladder tumor (TUR-BT) specimens with few samples. This study was conducted to address these shortcomings and confirm the accuracy of VI-RADS for bladder cancer.

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Open radical cystectomy (ORC) is associated with high rates of perioperative morbidity and mortality, owing to its extensive surgical nature and the high frequency of multiple co-morbidities among patients. As an alternative, robot-assisted radical cystectomy (RARC) has been increasingly adopted worldwide, being a reliable treatment option that utilizes minimally invasive surgery. Seventeen years have passed since the advent of the RARC, and comprehensive long-term follow-up data are now becoming available.

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Objectives: There is no consensus on the management plan for incidental prostate cancer (IPCa) after holmium laser enucleation of the prostate (HoLEP). This study aims to investigate the natural course of this disease and suggest appropriate treatment in real clinical practice.

Methods: The medical records of a prospective cohort of patients with LUTS/BPH who underwent HoLEP between July 2008 and December 2020 at Seoul National University Hospital were retrospectively reviewed.

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Radical prostatectomy (RP) is one of the standard treatments for localized prostate cancer. However, in terms of functional outcomes, there are aspects that still need improvements. We designed this prospective phase I/II clinical trial to assess the safety, clinical feasibility, and functional outcomes of hypothermic robot-assisted RP (RARP).

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Prostate cancer (PCa) is the most prevalent cancer worldwide, with a high mortality rate. The early and accurate detection of PCa is critical in reducing mortality and saving lives. Timely diagnosis can improve the chances of successful treatment using advanced technologies.

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  • The study investigates how pre-operative ipsilateral split renal function (SRF) impacts disease-free survival (DFS) in patients with renal cell carcinoma (RCC) undergoing surgery.
  • Out of 1,078 patients, those with decreased SRF exhibited larger tumor sizes, higher Fuhrman grades, and more aggressive tumor stages.
  • Analysis indicated that decreased SRF was linked to shorter DFS and presented as a significant risk factor alongside high SSIGN scores, suggesting its importance in assessing prognosis for RCC patients.
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Background: Kidney tubular damage markers are biomarkers of acute or chronic kidney injury. Hypothetically, upper tract urothelial cancer (UTUC), which induces obstructive uropathy or direct invasion of the renal parenchyma, may also induce increased excretion of urinary tubular damage proteins. Therefore, this study aimed to investigate the use of tubular damage biomarker as prognostic markers for UTUC.

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Purpose: To assess the prognostic value of acidic urine (low urine pH) in patients with bladder cancer undergoing radical cystectomy.

Materials And Methods: We reviewed patients enrolled in the Seoul National University Prospectively Enrolled Registry for Urothelial Cancer-Cystectomy (SUPER-UC-Cx) who underwent radical cystectomy for bladder cancer between March 2016 and December 2020 at the Seoul National University Hospital. During this period, 368 patients were registered in our database.

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