Seung-Ki Chon

Konkuk University, Sŏul, Seoul, South Korea

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Publications (4)4.7 Total impact

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    ABSTRACT: Abundant lymphocyte infiltration is frequently found in canine malignant mammary tumors, but the pathological features and immunophenotypes associated with the infiltration remain to be elucidated. The aim of the present study was to evaluate the relationship between lymphocyte infiltration, histopathological features, and molecular phenotype in canine mammary carcinoma (MC). The study was done with archived formalin-fixed, paraffin-embedded samples (n = 47) by histologic and immunohistochemical methods. The degree of lymphocyte infiltration was evaluated by morphologic analysis, and the T- and B-cell populations as well as the T/B-cell ratio were evaluated by morphometric analysis; results were compared with the histologic features and molecular phenotypes. The degree of lymphocyte infiltration was significantly higher in MCs with lymphatic invasion than in those without lymphatic invasion (P < 0.0001) and in tumors of high histologic grade compared with those of lower histologic grade (P = 0.045). Morphometric analysis showed a larger amount of T-cells and B-cells in MCs with a higher histologic grade and lymphatic invasion, but the T/B ratio did not change. Lymphocyte infiltration was not associated with histologic type or molecular phenotype, as assessed from the immunohistochemical expression of epidermal growth factor receptor 2, estrogen receptor, cytokeratin 14, and p63. Since intense lymphocyte infiltration was associated with aggressive histologic features, lymphocytes may be important for tumor aggressiveness and greater malignant behavior in the tumor microenvironment.
    No preview · Article · Apr 2013 · Canadian journal of veterinary research = Revue canadienne de recherche vétérinaire
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    ABSTRACT: We analyzed the expression level and cellular localization of pro- and anti-inflammatory cytokines and histopathologically characterized canine traumatic brain injury (TBI). Canine TBI brains revealed subarachnoid and cerebral cortical hemorrhage, neutrophilic infiltration, neuronal necrosis, astrocytosis, and vasogenic edema. Immunohistochemical evaluations suggested that both pro-inflammatory cytokines [interleukin (IL)-1β, IL-6, and tumor necrosis factor-α] and anti-inflammatory cytokines [IL-10 and transforming growth factor-beta (TGF-β)] were highly expressed in neurons and neutrophils. In particular, the highest magnitude of expression was identified for IL-1β and TGF-β. This data helps describe the pathologic characteristics of canine TBI, and may help in the design of potential therapeutic approaches to control secondary damage by inflammatory cytokines.
    Full-text · Article · Sep 2011 · Journal of veterinary science (Suwŏn-si, Korea)
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    ABSTRACT: Inflammatory mammary carcinoma (IMC) is a specific type of rare, very aggressive, and highly metastatic mammary cancer in both human beings and dogs. A 10-year-old female spayed Shih Tzu dog was diagnosed with secondary IMC. At necropsy, brain metastasis of mammary neoplastic cells was observed in tissues of the cerebrum and cerebellum. Metastases were also found in other distant organs such as heart, lung, liver, spleen, and inguinal lymph node. There is limited data about the metastasis of IMC and its pattern. The current report of IMC with brain metastases contributes to the understanding of metastatic IMC.
    Full-text · Article · Sep 2011 · Journal of veterinary diagnostic investigation: official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc
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    ABSTRACT: Renal disease includes conditions affecting the glomeruli, tubules, interstitium, pelvis, and vasculature. Diseases of the kidney include glomerular diseases, diseases of the tubules and interstitium, diseases of renal pelvis, and developmental abnormalities. Renal tissue samples (n = 70) submitted to the Department of Veterinary Pathology of Konkuk University from 2003 to 2008 were included in this study. Tissue histopathology was performed using light microscopy with hematoxylin and eosin stains. Masson's trichrome, Congo Red, and Warthin starry silver staining were applied in several individual cases. Glomerular diseases (22.9%), tubulointerstitial diseases (8.6%), neoplastic diseases (8.6%), conditions secondary to urinary obstruction (24.3%), and other diseases (35.7%) were identified. Glomerulonephritis (GN) cases were classified as acute proliferative GN (5.7%), membranous GN (4.3%), membranoproliferative GN (4.3%), focal segmental GN (2.9%), and other GN (4.2%). The proportion of canine GN cases presently identified was not as high as the proportions identified in human studies. Conversely, urinary obstruction and end-stage renal disease cases were relatively higher in dogs than in human populations.
    Full-text · Article · Dec 2010 · Journal of veterinary science (Suwŏn-si, Korea)