Publications by authors named "Seock Hwan Choi"

Purpose: Consensus is lacking among South Korean urologists on the appropriate treatment of metastatic hormone-sensitive prostate cancer (mHSPC). A modified, Delphi-based consensus on managing mHSPC patients was developed to support clinical decision-making.

Materials And Methods: Thirty-six questions on mHSPC treatment were developed by an expert committee (five urologists).

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Purpose: Prostate cancer ranks as the second most common cancer in men globally, representing a significant cause of cancer-related mortality. Metastasis, the spread of cancer cells from the primary site to distant organs, remains a major challenge in managing prostate cancer. Pyruvate dehydrogenase kinase 4 (PDK4) is implicated in the regulation of aerobic glycolysis, emerging as a potential player in various cancers.

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Prostate cancer (PCa) diagnosis faces significant challenges due to its complex pathological characteristics and insufficient pathologist resources. While deep learning-based image analysis (DLIA) shows promise in enhancing diagnostic accuracy, its application to radical prostatectomy (RP) specimens remains underexplored. In this study, we evaluated the clinical feasibility and prognostic value of a DLIA algorithm for Gleason grading and tumor quantification on whole RP specimens.

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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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Background: Renal function deterioration during systemic therapy in patients with metastatic renal cell carcinoma (mRCC) is a long-term concern in treatment planning. Although hypertension (HTN) and diabetes mellitus (DM) are the most common factors that affect chronic kidney disease (CKD) development and progression, their impact on renal function during targeted therapy is unclear. This study investigated whether DM and HTN were associated with a decline in renal function during first-line targeted therapy for mRCC.

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Background: Tissue clearing enables deep imaging in various tissues by increasing the transparency of tissues, but there were limitations of immunostaining of the large-volume tissues such as the whole brain.

Methods: Here, we cleared and immune-stained whole mouse brain tissues using a novel clearing technique termed high-speed clearing and high-resolution staining (HCHS). We observed neural structures within the cleared brains using both a confocal microscope and a light-sheet fluorescence microscope (LSFM).

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Purpose: Oligoprogressive lesions are observed in a subset of patients who progress to castration-resistant prostate cancer (CRPC), while other lesions remain controlled by systemic therapy. This study evaluates the impact of progression-directed therapy (PDT) on these oligoprogressive lesions.

Materials And Methods: This retrospective study included 40 patients diagnosed with oligoprogressive CRPC.

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Article Synopsis
  • The study compared the effectiveness and safety of two treatments for metastatic hormone-sensitive prostate cancer (mHSPC): androgen-deprivation therapy (ADT) combined with abiraterone/prednisone versus ADT combined with docetaxel.
  • It analyzed data from 928 patients in South Korea, specifically focusing on 122 patients who received either treatment, assessing various factors like demographic characteristics, cancer status, and treatment outcomes.
  • Results showed that the ADT+abiraterone/prednisone group had a significantly lower rate of prostate-specific antigen (PSA) progression and a lower rate of treatment discontinuation compared to the ADT+docetaxel group, indicating it may be more effective, although further research is
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Objective: The objective of this study is to provide a comparative analysis of variant clusters and their relevance across Africa, America, Europe, and Asia, in order to understand the evolutionary patterns of the virus across different regions and to inform the development of targeted interventions and genomic surveillance eforts.

Methods: The study analyzed the global lineage evolution pattern of 74, 075 severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) genomes from 32 countries across four continents, focusing on variant clusters and their relevance across regions. Variants were weighted according to their hierarchical level.

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Article Synopsis
  • * The most common primary treatment was androgen deprivation therapy (ADT), with a significant number receiving radical prostatectomy (RP) or radiation therapy; younger patients tended to undergo RP, showing better overall health and less advanced cancer.
  • * Multivariate analyses identified age, performance status, and prostate-specific antigen levels as key prognostic factors, with maximal androgen blockade (MAB) being the most prevalent treatment, particularly the leuprolide plus bicalutamide regimen.
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Purpose: This study aimed to compare the characteristics of asymptomatic and symptomatic nephrolithiasis in patients who underwent surgical treatment for kidney stones.

Materials And Methods: Between 2015 and 2019, 245 patients who underwent percutaneous nephrolithotomy or retrograde intrarenal surgery for kidney stones were included. The patients were divided into asymptomatic (n=124) and symptomatic (n=121) groups.

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Curiosity concerning the process of human creation has been around for a long time. Relevant questions seemed to be resolved with the knowledge of how cells divide after fertilization obtained through in vitro fertilization experiments. However, we still do not know how human life is created at the cellular level.

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No definitive criteria regarding the performance of preoperative chest computed tomography (CT) in patients with cT1a renal cell carcinoma (RCC) exists. We aimed to establish an objective standard for the optimal timing of preoperative chest CT in patients with RCC. Data from 890 patients who underwent surgical treatment for RCC between January 2011 and December 2020 were retrospectively collected.

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Bladder cancer is a common global cancer with a high percentage of metastases and high mortality rate. Thus, it is necessary to identify new biomarkers that can be helpful in diagnosis. Pyruvate dehydrogenase kinase 4 (PDK4) belongs to the PDK family and plays an important role in glucose utilization in living organisms.

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Bladder cancer, one of the most frequently diagnosed cancers worldwide, is associated with high morbidity and mortality and a poor prognosis. The bladder cancer types include 1) non-muscle invasive bladder cancer (NMIBC) and 2) muscle invasive bladder cancer (MIBC). Metastases and chemoresistance in MIBC patients are the leading causes of the high death rate.

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Background: In humans, after fertilization, the zygote divides into two 2n diploid daughter blastomeres. During this division, DNA is replicated, and the remaining mutually exclusive genetic mutations in the genome of each cell are called post-zygotic variants. Using these somatic mutations, developmental lineages can be reconstructed.

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This study compares the efficacy of the early low-intensity shock wave therapy (LI-SWT) plus daily tadalafil with daily tadalafil only therapy as penile rehabilitation for postprostatectomy erectile dysfunction in patients with prostate cancer who underwent bilateral interfascial nerve-sparing radical prostatectomy (robotic or open). From April 2019 to March 2021, 165 patients were enrolled, and 80 of them successfully completed this prospective study. Daily tadalafil were administered to all the patients.

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Background: Rhabdomyolysis is a clinical symptom caused by the rapid release of intracellular components such as myoglobin, lactate dehydrogenase, and creatine kinase into the blood circulation. It is commonly caused by muscular injury including compartment syndrome, infection, drugs, etc. Although it rarely occurs during surgery, the incidence may increase if risk factors such as long operation time, improper posture, and condition of being overweight exist.

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Purpose: In this study, we evaluated the predictability of a modified Club Urológico Español de Tratamiento Oncológico (CUETO) scoring model and preoperative neutrophil-to-lymphocyte ratio (NLR) in patients with non-muscle invasive bladder cancer (NMIBC).

Materials And Methods: From August 2005 to May 2016, a total of 281 patients received intravesical bacillus Calmette-Guérin therapy after transurethral resection of a bladder tumor. The pathologic stage of all patients was Ta or T1.

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Objective: This prospective study sought to clarify the developmental endothelial locus-1 (Del-1) protein as values of diagnosis and risk stratification of prostate cancer (PCa).

Design: From February 2017 to December 2019, a total 458 patients who underwent transrectal ultrasound guided prostate biopsy or surgery of benign prostatic hyperplasia agreed to research of Del-1 protein. We prospectively compared and analyzed the Del-1 protein and prostate specific antigen (PSA) in relation to the patients' demographic and clinicopathological characteristics.

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Rationale: Gallbladder polyps are common in the general population, but gallbladder metastasis of renal cell carcinoma (RCC) is very rare. In a patient with RCC diagnosed with a small gallbladder polyp that does not meet the traditional size criteria, the surgeon faces a dilemma of whether cholecystectomy should be performed given the possibility of metastasis.

Patient Concerns: A 55-year-old man who had received a left nephrectomy for RCC presented with a gallbladder polyp that was noted at the time of the nephrectomy.

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Objectives: To investigate the clinicopathological features and outcomes of targeted therapy in patients with recurrence of renal cell carcinoma in <5 years or ≥5 years after the surgical treatment for renal cell carcinoma.

Methods: Patients with metastatic renal cell carcinoma treated with targeted therapy in a multicenter database were retrospectively characterized according to time from surgery to recurrence. Early recurrence was defined as recurrence within 5 years after surgery, and late recurrence was defined as occurring ≥5 years after surgery.

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Purpose: Perirenal fat stranding (PRFS) is defined as linear areas of soft-tissue attenuation in the perirenal space that can result from ureteral obstruction. We analyzed the prognostic impact of PRFS on outcomes in patients with ureteral urothelial carcinoma (UC).

Materials And Methods: Overall, 126 patients evaluated preoperatively by computerized tomography (CT) scan and diagnosed with ureteral UC following nephroureterectomy between January 2001 and May 2018 were included.

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Purpose: Renal artery pseudoaneurysms (RAPs) and arteriovenous fistulas (AVFs) are rare but potentially life-threatening complications after partial nephrectomy (PN). Selective arterial embolization (SAE) is an effective method for controlling RAPs/AVFs. We assessed the clinical factors affecting the occurrence of RAPs/AVFs after PN and the effects of SAE on postsurgical renal function.

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