Hyeon-Kyoung Koo

Inje University Paik Hospital, Sŏul, Seoul, South Korea

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Publications (9)10.29 Total impact

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    ABSTRACT: Rhinovirus infection is typically associated with the common cold and has rarely been reported as a cause of severe pneumonia in immunocompetent adults. A 55-year-old previous healthy woman, who consumed half a bottle of alcohol daily, presented with respiratory failure after one week of upper respiratory infection symptoms. Radiography revealed bilateral, diffuse ground glass opacity with patchy consolidation in the whole lung field; bronchoalveolar lavage fluid analysis indicated that rhinovirus was the causative organism. After five days of conservative support, the symptoms and radiographic findings began to improve. We report this rare case of rhinovirus pneumonia in an otherwise healthy host along with a review of references.
    Tuberculosis and Respiratory Diseases 09/2014; 77(3):132-5.
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    ABSTRACT: Acute lung injury occasionally occurs after chemotherapy, but pulmonary toxicities by oxaliplatin-based chemotherapy have rarely been identified. A 76-year-old female with rectosigmoid colon cancer presented with ongoing dyspnea after the eighth cycle of standard chemotherapy (5-fluorouracil, sodium folinic acid, and oxaliplatin: FOLFOX). Nodular consolidation progressed despite antibiotics and BAL fluid analysis was compatible with the diagnosis of sarcoidosis. Corticosteroid therapy rapidly improved the symptoms and radiographic findings. We report this first case of secondary sarcoidosis related to FOLFOX therapy with review of references.
    Case reports in oncological medicine. 01/2014; 2014:203027.
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    ABSTRACT: To determine the impact of sarcopenia and obesity on pulmonary function and quality of life (QOL) in chronic obstructive pulmonary disease (COPD) patients.
    PLoS ONE 01/2014; 9(10):e110448. · 3.53 Impact Factor
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    Hyeon-Kyoung Koo, Chul-Gyu Yoo
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    ABSTRACT: A lung cyst is an air-filled lucent structure surrounded by a thin wall. The presence of multiple intrapulmonary cysts is defined as cystic lung disease. Although cystic lung disease is rare, incidental detection has increased significantly in recent years by screening using computed tomography. There are many conditions that can mimic lung cysts and cause cystic lung disease. Clinical, radiographic, and histologic findings are all necessary for a proper diagnosis, and multidisciplinary approaches are frequently required. The aim of this report is to review the causes and characteristics of cystic lung disease to better understand and improve treatment.
    Tuberculosis and Respiratory Diseases 03/2013; 74(3):97-103.
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    ABSTRACT: Radiographic lesions suggesting old healed tuberculosis (TB) is considered a risk factor for the subsequent development of active TB. The aim of this study was to estimate the positive rates of tuberculin skin test (TST) and interferon-gamma release assay (IGRA) in persons with old healed TB. Participants with lesions suggesting old healed TB on chest images and controls without such lesions were prospectively enrolled between January 1, 2010, and January 31, 2011. TST and the QuantiFERON-TB Gold In-Tube test (QFT-GIT) were performed. In total, 193 participants with old healed TB and 126 controls were recruited. The rates of positive TST and QFT-GIT among patients with old healed TB were 54.6% and 77.7%, respectively. The rates of positive TST and QFT-GIT among patients without old healed TB were 38.9% and 61.9%. Sixteen percent of participants with old healed TB showed negative results by both TST and QFT-GIT. The positive rate of TST waned among participants with old healed TB who were older than 60 yr, whereas QFT-GIT positivity was unaffected by age. The positive rates of TST and IGRA among participants with radiographic lesions suggesting old healed TB was higher than without those lesions. In addition, IGRA may be more accurate than TST for the detection of latent TB infection, especially in populations of individuals older than 60 yr.
    Journal of Korean medical science 07/2012; 27(7):761-6. · 0.84 Impact Factor
  • American Thoracic Society 2012 International Conference, May 18-23, 2012 • San Francisco, California; 05/2012
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    ABSTRACT: Vitamin D deficiency has been reported to be associated with the development of active tuberculosis (TB), but many discrepancies exist among studies. The aims of this study were to compare the frequency of vitamin D deficiency in a Korean population of TB patients and control subjects, and to monitor the changes in vitamin D levels during TB treatment. Patients with newly diagnosed TB were prospectively enrolled. In addition, healthy volunteers or patients with diseases other than TB were enrolled as controls. Baseline serum 25-hydroxyvitamin D (25-OHD) levels were measured in both groups and compared. In the TB patients, measurements of serum 25-OHD were repeated 1 month after the initiation of treatment and again after completion of treatment. In total, 116 patients with TB and 86 control subjects were recruited. The median 25-OHD concentration was not different in TB patients at diagnosis (13.9 ng/mL; interquartile range (IQR) 8.80-21.8) compared with control subjects (13.2 ng/mL; IQR 9.6-19.3) (P = 0.97). The frequency of vitamin D deficiency (≤ 10 ng/mL) was also not different in TB patients (36.2%) compared with controls (27.3%) (P = 0.21). In TB patients, the median 25-OHD concentration decreased significantly during treatment, to 12.5 ng/mL at 1 month and 11.0 ng/mL on completion of treatment (P = 0.01). Vitamin D levels do not appear to be associated with the development of TB in the Korean population. The median 25-OHD concentration decreased after treatment for TB.
    Respirology 03/2012; 17(5):808-13. · 2.78 Impact Factor
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    ABSTRACT: Patients with stage I-II non-small cell lung cancer (NSCLC) show variability in recurrence after curative resection. Several factors have been proposed as prognostic of recurrence in previous studies. However, because of the heterogeneity of the populations studied, these reports did not yield consistent results. The aim of our study was to identify risk factors for recurrence in patients with curatively resected stage I-II NSCLC. We reviewed the medical records of pathological stage I-II NSCLC patients after curative surgery performed in a tertiary referral center (Seoul National University Hospital) from January 2002 to December 2004. Demographic factors, radiological, histopathological, and laboratory findings, and surgery-related factors were analyzed. Patients with invasive cancer other than lung cancer that was present 5 years prior to surgery were excluded. The Cox proportional hazard regression model was used for multivariate analyses. Three hundred and ten patients were included. Among them, local recurrence occurred in 27 patients (8.7%), whereas distant recurrence occurred in 79 patients (25.5%). Adenocarcinoma histology (OR, 2.74; 95% CI, 1.14-6.58; P=0.024), carcinoembryonic antigen (CEA) level>2.3 ng/mL (OR, 2.26; 95% CI, 1.02-5.00; P=0.045), and standard uptake values (SUV) of tumor in positron emission tomography (PET)>4.5 (OR, 5.45; 95% CI, 1.82-16.31; P=0.002) were independent predictors of recurrence in addition to TNM stage. We also constructed a recurrence prediction model based on these findings, which yielded better diagnostic performance than the TNM staging system. Adenocarcinoma histology, CEA level, and SUV of PET could be considered as prognostic factors for recurrence in patients with curatively resected stage I-II NSCLC.
    Lung cancer (Amsterdam, Netherlands) 12/2010; 73(2):222-9. · 3.14 Impact Factor
  • American Thoracic Society 2010 International Conference, May 14-19, 2010 • New Orleans; 05/2010

Publication Stats

18 Citations
10.29 Total Impact Points


  • 2012–2014
    • Inje University Paik Hospital
      • Department of Internal Medicine
      Sŏul, Seoul, South Korea
  • 2010
    • Seoul National University Hospital
      • Department of Internal Medicine
      Seoul, Seoul, South Korea