Publications by authors named "Ja Hyeon Ku"

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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Background: To compare the efficacy and toxicity of docetaxel treatment regimens in metastatic castration-resistant prostate cancer (mCRPC).

Methods: We retrospectively analyzed 162 patients diagnosed with mCRPC who underwent docetaxel chemotherapy between 2009 and 2020. The patients were divided into three groups according to the dosage and interval of docetaxel (DCT) chemotherapy regimen: 30 mL/m weekly, 50 mL/m biweekly (every 2 weeks), and 75 mL/m triweekly (every 3 weeks).

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To determine risk factors for urinary retention (UR) after robot-assisted radical cystectomy (RALC) with orthotopic neobladder diversion. A total of 269 patients who underwent RALC with orthotopic neobladder diversion from 2008 to 2019 at seven tertiary hospitals were retrospectively analyzed. There were 68 patients who had UR (UR arm) and 201 patients who did not have UR (no-UR arm).

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Article Synopsis
  • * 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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TFE3-rearranged renal cell cancer (tRCC) is a rare form of RCC that involves chromosomal translocation of the Xp11.2 TFE3 gene. Despite its early onset and poor prognosis, the molecular mechanisms of the pathogenesis of tRCC remain elusive.

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To investigate the influence of preoperative smoking history on the survival outcomes and complications in a cohort from a large multicenter database. Many patients who undergo radical cystectomy (RC) have a history of smoking; however, the direct association between preoperative smoking history and survival outcomes and complications in patients with muscle-invasive bladder cancer (MIBC) who undergo robot-assisted radical cystectomy (RARC) remains unexplored. We conducted a retrospective analysis using data from 749 patients in the Korean Robot-Assisted Radical Cystectomy Study Group (KORARC) database, with an average follow-up duration of 30.

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  • - Innate immune cells play a crucial role in fighting tumors, and their function can be influenced by beneficial bacteria found in food.
  • - The specific bacterial strain Lactiplantibacillus plantarum IMB19 enhances antitumor immunity in mouse models, primarily through its capsular heteropolysaccharide, which activates immune pathways.
  • - This strain reprograms tumor-related macrophages to promote robust T cell responses while also capturing iron in the tumor environment, potentially leading to cancer cell death and improved treatment strategies using "oncobiotics."
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Bacillus Calmette-Guérin (BCG) is the standard of care for patients with high-risk non-muscle-invasive bladder cancer (NMIBC) after transurethral resection of bladder tumor (TURBT). BCG in combination with programmed cell death-1 (PD-1) inhibitors may yield greater anti-tumor activity compared with either agent alone. CREST is a phase III study evaluating the efficacy and safety of the subcutaneous PD-1 inhibitor sasanlimab in combination with BCG for patients with BCG-naive high-risk NMIBC.

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Background: No new agent has improved overall survival in patients with unresectable or metastatic urothelial carcinoma when added to first-line cisplatin-based chemotherapy.

Methods: In this phase 3, multinational, open-label trial, we randomly assigned patients with previously untreated unresectable or metastatic urothelial carcinoma either to receive intravenous nivolumab (at a dose of 360 mg) plus gemcitabine-cisplatin (nivolumab combination) every 3 weeks for up to six cycles, followed by nivolumab (at a dose of 480 mg) every 4 weeks for a maximum of 2 years, or to receive gemcitabine-cisplatin alone every 3 weeks for up to six cycles. The primary outcomes were overall and progression-free survival.

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Background: Erdafitinib is a pan-fibroblast growth factor receptor (FGFR) inhibitor approved for the treatment of locally advanced or metastatic urothelial carcinoma in adults with susceptible alterations who have progression after platinum-containing chemotherapy. The effects of erdafitinib in patients with -altered metastatic urothelial carcinoma who have progression during or after treatment with checkpoint inhibitors (anti-programmed cell death protein 1 [PD-1] or anti-programmed death ligand 1 [PD-L1] agents) are unclear.

Methods: We conducted a global phase 3 trial of erdafitinib as compared with chemotherapy in patients with metastatic urothelial carcinoma with susceptible alterations who had progression after one or two previous treatments that included an anti-PD-1 or anti-PD-L1.

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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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Background: This study investigated the effects of intraoperative goal-directed hemodynamic therapy (GDHT) on postoperative outcomes in patients undergoing open radical cystectomy.

Methods: This prospective, single-center, randomized controlled trial included 82 patients scheduled for open radical cystectomy between September 2018 and November 2021. The GDHT group (n = 39) received the stroke volume index- and cardiac index-based hemodynamic management using advanced hemodynamic monitoring, while the control group (n = 36) received the standard care under the discretion of attending anesthesiologists during surgery.

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Objectives: Multiple clinical practice guidelines, conflicting evidence, and physician perceptions result in variations in risk stratification among patients with non-muscle-invasive bladder cancer (NMIBC). This study aims to describe the extent of this variation and its impact on management approaches in the Asia-Pacific region.

Methods: We conducted a cross-sectional survey involving 32 urologists and seven medical oncologists with ≥8 years of experience managing early-stage bladder cancer patients across Australia, Hong Kong, Japan, South Korea, Singapore, and Taiwan.

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Objectives: Examine the understanding of terminologies and management patterns of bacillus Calmette-Guérin (BCG)-unresponsive nonmuscle invasive bladder cancer (NMIBC) in six territories in Asia-Pacific.

Methods: This study involved two phases: (1) a survey with 32 urologists and 7 medical oncologists (MOs) and (2) a factorial experiment and in-depth interviews with 23 urologists and 2 MOs. All clinicians had ≥8 years' experience managing NMIBC patients in Australia, Hong Kong, Japan, South Korea, Singapore, and Taiwan.

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Article Synopsis
  • 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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  • The study aimed to compare how different types of urinary diversion (ileal conduit vs. neobladder) affect kidney function in patients with a single kidney who had bladder cancer surgery.
  • Researchers assessed kidney function in 86 patients over several months using various methods and found no significant differences in kidney function change between the two urinary diversion types.
  • The results suggest that since urinary diversion type did not affect kidney function, patients with a single kidney might be good candidates for neobladder surgery.
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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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To investigate the prognostic impact of postoperative neutrophil to lymphocyte ratio (NLR) on survival outcomes in upper urinary tract urothelial carcinoma (UTUC). Data from 397 patients with UTUC who underwent radical nephroureterectomy (RNU) without a history of neoadjuvant chemotherapy between 2002 and 2017 were retrospectively analyzed. Based on a postoperative NLR cut-off of 3, patients were divided into low NLR (<3) or high NLR (≥ 3) groups.

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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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