Publications by authors named "Yun Hwan Jung"

Introduction: Patients with cancer experience physical, mental, and social pain that affects themselves and their families. The increasing cancer incidence and advances in treatment have increased the number of cancer survivors in Korea, and there is an influx of patients in Seoul and other metropolitan areas, leading to shortages of continuous care and comprehensive life support facilities. Patients must travel long distances for treatment, which poses logistical and quality-of-life challenges.

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Purpose: The Korean Cancer Study Group (KCSG) is a nationwide cancer clinical trial group dedicated to advancing investigator-initiated trials (IITs) by conducting and supporting clinical trials. This study aims to review IITs conducted by KCSG and quantitatively evaluate the survival and financial benefits of IITs for patients.

Materials And Methods: We reviewed IITs conducted by KCSG from 1998 to 2023, analyzing progression-free survival (PFS) and overall survival (OS) gains for participants.

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Article Synopsis
  • This study explored how genetic changes in PI3KCA and cell cycle pathways affect the effectiveness of durvalumab in patients with head and neck squamous cell carcinoma who did not respond to prior platinum-based treatments.
  • Data was collected from a phase II trial involving 87 patients segmented into three groups based on their genetic alterations: PIK3CA changes (Group A), cell cycle alterations (Group B), and no significant genetic changes (Group C).
  • The results showed no significant differences in treatment outcomes between the groups, but lower neutrophil-lymphocyte and platelet-lymphocyte ratios were associated with better progression-free survival, suggesting these could be useful biomarkers for predicting treatment response.
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Background: Although atherosclerosis is likely to be involved in the development of arterial thrombotic events in patients with essential thrombocythemia (ET), abdominal aortic calcification (AAC) has rarely been investigated. We evaluated the prevalence and clinical relevance of AAC at the time of ET diagnosis.

Methods: This retrospective study included patients newly diagnosed with ET who underwent abdominal computed tomography (CT) at the time of diagnosis between January 2002 and December 2021 at Chungnam National University Hospital, Daejeon, Korea.

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Article Synopsis
  • - This study investigated a targeted treatment approach for patients with platinum-refractory recurrent and/or metastatic head and neck squamous cell carcinoma (HNSCC) through a genomic profile-based trial involving multiple treatment arms.
  • - Patients were assigned to different treatment groups based on their genetic profiles, with various inhibitors used, and crossover to an anti-PD-L1 treatment was allowed if their initial therapy failed.
  • - The trial enrolled 203 patients and found varying levels of disease control and response rates across different arms, while the treatments were generally well-tolerated with no treatment-related deaths reported.
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Introduction: Upfront autologous stem cell transplantation (ASCT) has been recommended for patients who are newly diagnosed with peripheral T-cell lymphoma (PTCL), and CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisone), an anthracycline-based chemotherapy has been the frontline chemotherapy for PTCL. However, it is not clear whether anthracycline-based chemotherapies such as CHOP could be standard induction therapy for PTCL.

Methods: We conducted a randomized phase II study to compare CHOP with fractionated ifosfamide, carboplatin, etoposide, and dexamethasone (ICED) for patients eligible for ASCT.

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Purpose: Fluoropyrimidine (FP) with oxaliplatin-based chemotherapy is the standard first-line treatment for metastatic colorectal cancer (mCRC); however, oxaliplatin-induced neuropathy critically affects the quality of life of patients. Maintenance strategies with FP plus bevacizumab have been well-established; nonetheless, the real-world outcomes of maintenance therapy with FP and cetuximab are unclear. We investigated the clinical outcomes of patients who underwent maintenance therapy with cetuximab.

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The aim of this study was to assess the therapeutic efficacy of a cisplatin and vinorelbine combination as second- or higher-line palliative chemotherapy in patients with advanced ovarian cancer. We retrospectively reviewed the medical records of patients with advanced ovarian cancer who were treated with cisplatin (60 mg/m2 on day 1) and vinorelbine (25 mg/m2 on days 1 and 8) every 3 weeks between January 2004 and March 2021. Treatment responses, progression-free survival (PFS), and overall survival (OS) were assessed; laboratory data were reviewed to determine toxicity.

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Background: Acquired von Willebrand syndrome (AVWS) has not been investigated in Korean patients with Philadelphia chromosome-negative myeloproliferative neoplasm.

Methods: This study analyzed the prevalence at diagnosis and clinical features of AVWS in patients with essential thrombocythemia (ET), polycythemia vera (PV), prefibrotic/early primary myelofibrosis (pre-PMF), or overt PMF (PMF) diagnosed between January 2019 and December 2021 at Chungam National University Hospital, Daejeon, Korea. AVWS was defined as below the lower reference limit (56%) of ristocetin cofactor activity (VWF:RCo).

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We aimed to compare treatment modalities and outcomes by gender in patients with locally advanced head and neck squamous cell carcinoma (LA-HNSCC). We characterized the sex-specific differences and compared the overall survival (OS) between male and female patients in a multicenter cohort of LA-HNSCC. To minimize the observed confounding, propensity score matching was utilized.

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Purpose: To evaluate the role of the cardiopulmonary exercise test (CPET) with comorbidity index as a predictor of overall survival (OS) and non-relapse mortality (NRM) in patients with hematological malignancies who undergo allogeneic hematopoietic stem cell transplantation (HSCT).

Methods: We retrospectively analyzed consecutive adult patients with hematological malignancies who underwent HLA-matched donor-HSCT at Chungnam National University Hospital (Daejeon, South Korea) between January 2014 and December 2020. Maximal oxygen consumption (VOmax) was classified using the recommendations of the Mayo Clinic database.

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Objective We retrospectively analyzed the prevalence and clinical features of splenic infarctions in patients with Philadelphia chromosome-negative myeloproliferative neoplasms (Ph MPNs). Patients Patients diagnosed with essential thrombocythemia (ET), polycythemia vera (PV), prefibrotic/early primary myelofibrosis (pre-PMF), or PMF from January 1996 to October 2020 in Chungnam National University Hospital, Daejeon, Korea, were reviewed. Results A total of 347 patients (143 ET, 129 PV, 44 pre-PMF, and 31 PMF patients; 201 men and 146 women) with a median age of 64 (range 15-91) years old were followed up for a median of 4.

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Background: Non-palpable splenomegaly in patients with polycythemia vera (PV) has seldom been addressed. In this retrospective study, we evaluated non-palpable, volumetric splenomegaly defined based on age- and body surface area (BSA)-matched criteria in patients with PV diagnosed according to the 2016 World Health Organization diagnostic criteria.

Methods: Patients with PV who underwent abdominal computed tomography (CT) and who had palpable splenomegaly at diagnosis from January 1991 to December 2020 at Chungnam National University Hospital were enrolled.

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Background: Information on myelofibrotic and leukemic transformations in Korean Philadelphia chromosome- negative myeloproliferative neoplasms (Ph MPNs) is limited.

Methods: This study retrospectively analyzed transformations in patients diagnosed with essential thrombocythemia (ET), polycythemia vera (PV) prefibrotic/early primary myelofibrosis (pre-PMF), or overt primary myelofibrosis (PMF) based on the 2016 World Health Organization criteria between January 1996 and December 2020 at Chungam National University Hospital, Daejeon, Korea.

Results: A total of 351 patients (144 with ET, 131 with PV, 45 with pre-PMF, and 31 with PMF; 204 men and 147 women) with a median age of 64 years (range, 15‒91 years) were followed for a median of 4.

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Article Synopsis
  • The study focuses on the impact of pegfilgrastim prophylaxis on preventing febrile neutropenia (FN) in diffuse large B-cell lymphoma (DLBCL) patients being treated with the R-CHOP regimen.
  • Results showed that pegfilgrastim significantly reduced FN incidence, treatment-related mortality (TRM), and the number of dose delays compared to a historical cohort.
  • Additionally, while overall survival rates were similar, pegfilgrastim improved survival in patients aged 75 and older, indicating its benefits for older DLBCL patients.
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Article Synopsis
  • - Older patients (aged ≥ 70) with locally advanced head and neck squamous cell carcinoma (LA-HNSCC) represent 18.7% of a cohort studied, showing more advanced disease and worse performance status compared to younger patients.
  • - Treatment for these older patients included concurrent chemoradiotherapy (44.5%), surgery (41.0%), and a significant portion (14.5%) who did not complete planned treatment.
  • - Results indicated that older patients had a 60% higher risk of death compared to younger counterparts, with those having oral cavity cancer facing the worst survival rates, highlighting the need for tailored research on this age group.
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Dasatinib, a tyrosine kinase inhibitor (TKI), induces pulmonary hypertension (PH) in patients with chronic myeloid leukemia (CML). However, information on other TKIs is limited.We retrospectively analyzed PH prevalence by reviewing transthoracic echocardiography (TTE) findings in a population of Korean CML patients treated with TKI at a single hospital between 2003 and 2020.

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Purpose: Evaluation of symptoms and signs for the management of neuropathic cancer pain (NCP) is challenging. This study aimed to identify clinical predictors of NCP and symptoms and signs most relevant of those in Korean patients.

Methods: This nationwide, descriptive, cross-sectional, multicenter, observational study included 2,003 cancer patients aged ≥20 years who reported a visual analog scale (VAS) score ≥1 for pain and provided informed consent for participation.

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Background: Peripheral T-cell lymphomas (PTCLs) are uncommon and their frequency is regionally heterogeneous. Several studies have been conducted to evaluate the clinical features and treatment outcomes of this disease entity, but the majority of these were conducted in limited areas, making it difficult to comprehensively analyze their relative frequency and clinical features. Furthermore, no consensus treatment for PTCLs has been established.

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Cutaneous T-cell lymphomas (CTCLs) are a group of T-cell lymphomas with low incidence. Due to their indolent characteristics, treatment strategies have not yet been established for advanced CTCLs. In this study, relative incidence of CTCLs in Asia was estimated and the therapeutic outcomes presented based on various treatments currently used in clinics for advanced CTCLs.

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Background/aims: Recent changes in the diagnostic criteria for myeloproliferative neoplasms (MPNs) and increasing patient numbers necessitate updating of the data on vascular events in patients with such disorders.

Methods: In this single-center study, thrombotic and hemorrhagic events were retrospectively analyzed in patients diagnosed with essential thrombocythemia (ET), polycythemia vera (PV) prefibrotic/early primary myelofibrosis (pre-PMF), or PMF, based on the 2016 World Health Organization diagnostic criteria.

Results: Of a total of 335 consecutive patients (139 ET, 42 pre-PMF, 124 PV, and 30 PMF patients; 192 males and 143 females) of median age 64 years (range, 15 to 91), 112 (33.

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Background/aims: Febrile neutropenia (FN) interferes with the proper chemotherapy dose density or intensity in non-Hodgkin's lymphoma (NHL) patients. Chemotherapy with cyclophosphamide, doxorubicin, vincristine, and prednisone (CHOP) ± rituximab has an intermediate FN risk. Prophylactic granulocyte colony-stimulating factor (G-CSF) support is recommended for patients with other host-related risk factors.

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Article Synopsis
  • The study investigates how chemotherapy before surgery (induction chemotherapy, IC) affects outcomes in patients with locally advanced head and neck cancer, focusing on who responds to treatment and their survival rates.
  • Out of 445 patients, 158 received IC; those who responded to IC had significantly better survival rates, while non-responders had a much higher risk of mortality.
  • Ultimately, the results suggest that a multi-faceted treatment approach is essential for non-responders, while responders benefited similarly from either surgery or concurrent chemoradiotherapy (CCRT).
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Non-palpable, volumetric splenomegaly at diagnosis was evaluated using computed tomography in patients with essential thrombocythemia (ET) and prefibrotic/early primary myelofibrosis (pre-PMF) based on 2016 World Health Organization guidelines. Each patient's spleen volume was adjusted for their age and body surface area. The degree of splenomegaly was classified as no, borderline volumetric, overt volumetric, or palpable splenomegaly.

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  • Scientists discovered a new marine ciliate species, Anteholosticha foissneri n. sp., during a study in Vietnam.
  • This species is similar to Anteholosticha monilata-like organisms in terms of macronuclear and micronuclei arrangement, but can be differentiated by the unique features of its cortical granules.
  • The study revealed a new type of cell division in this ciliate that’s not previously documented, suggesting it belongs to a distinct evolutionary group within its family.
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