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Kim JY, Jeon TJ, Bae BN, Kwon JE, Kim HJ, Park K, Shin E. The prognostic significance of growth factors and growth factor receptors in gastric adenocarcinoma. APMIS 2012; 121:95-104. [PMID: 23030255 DOI: 10.1111/j.1600-0463.2012.02942.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2012] [Accepted: 05/25/2012] [Indexed: 12/18/2022]
Abstract
We evaluated growth factors/receptors expression in gastric adenocarcinoma. Immunohistochemistry was used to evaluate epidermal growth factor receptor (EGFR), vascular endothelial growth factor (VEGF), VEGF-D, VEGF receptor (VEGFR)-2, VEGFR-3, transforming growth factor (TGF)-α, TGF-β1, and TGF-β-RII in tissue microarrays of adenocarcinoma, dysplasia, metaplasia, and gastritis. In adenocarcinoma, the expression rates of EGFR, VEGF, VEGF-D, VEGFR-2, VEGFR-3, TGF-α, TGF-β1, and TGF-β-RII were 2.0%, 0%, 10.7%, 4.4%, 11.2%, 26.3%, 9.4%, and 19.5%, respectively. VEGF-D, TGF-α, TGF-β1, and TGF-β-RII expression rate were higher in adenocarcinoma than in other groups. TGF-β-RII expression was correlated with VEGFR-3, VEGF-D, and TGF-α expression in adenocarcinomas. Tumor location, histologic type, stage, lymphatic invasion, perineural invasion, angioinvasion, VEGF-D, and VEGFR-2 expressions were associated with patient survival in a log rank test and advanced stage and positive expression of VEGF-D were poor prognostic factors using Cox analysis. VEGF-D expression may be of prognostic value in gastric adenocarcinoma, whereas EGFR and TGF family expression may only have a minor influence.
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Roh MR, Zheng Z, Kim HS, Kwon JE, Jeung HC, Rha SY, Chung KY. Differential expression patterns of MMPs and their role in the invasion of epithelial premalignant tumors and invasive cutaneous squamous cell carcinoma. Exp Mol Pathol 2012; 92:236-42. [PMID: 22305927 DOI: 10.1016/j.yexmp.2012.01.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Accepted: 01/17/2012] [Indexed: 10/14/2022]
Abstract
Co-expression of several members of the matrix metalloproteinase (MMP) family is characteristic of human malignant tumors. MMP-2, MMP-9, TIMP-2, and MT1-MMP are thought to be involved in the process of destruction of basement membranes and stromal invasion by neoplastic epithelial cells. In this study, we investigated the expression and role of MMPs in cutaneous oncogenesis. Tissue microarray consisting of 62 squamous cell carcinomas (SCC), 32 Bowen's disease (BD) samples, 25 normal epidermis samples were obtained for the study. MMP-2,-9, MT1-MMP and TIMP-2 proteins were examined by immunohistochemical staining and mRNA level was detected by quantitative RT-PCR in fresh tissues consisting of 5 cutaneous SCCs and paired normal epidermis samples. Gelatinase activity of MMP-2 and MMP-9 was investigated by gelatin zymography and protein levels of MT1-MMP and TIMP-2 were measured by western blot in 2 human SCC cell lines. The invasive property was evaluated with invasion assays using Transwell filters. SCC exhibited significantly increased MMP-2, MT1-MMP and decreased TIMP-2 mRNA and protein expression compared to that of the normal epithelium. Immunohistochemical staining revealed that MT1-MMP was strongly expressed on the invasive front of SCCs, whereas BD exhibited higher expression around the dyskeratotic cells in the epithelium. In comparison with the expression observed in BD, SCC exhibited significantly increased MMP-2 expression. In addition, high MMP-2 and MT1-MMP expression and low TIMP-2 expression had a significant positive correlation with the invasiveness of SCC cell lines in vitro. Our results revealed significantly increased MT1-MMP and MMP-2 expression and decreased TIMP-2 expression in cutaneous SCC, and the expression correlated with the invasiveness of SCC cell lines. Therefore, the expression of these factors in cutaneous tumors may serve as an indicator of tumor aggressiveness and invasion.
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Kwon JE, Son JH, Lee YB, Lim JH, Choi YJ, Han M, Jeon YK, Im SA, Park WB. A Case of Disseminated Skin and Soft Tissue Infection due to Mycobacterium abscessuswith Metastatic Breast Cancer. Infect Chemother 2012. [DOI: 10.3947/ic.2012.44.3.201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Kim JY, Yoo YS, Kwon JE, Kim HJ, Park K. Fine-needle aspiration cytology with c-kit immunocytochemical staining in the diagnosis of Warthin's tumor. Acta Cytol 2012; 56:474-80. [PMID: 23075886 DOI: 10.1159/000339195] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2012] [Accepted: 04/30/2012] [Indexed: 11/19/2022]
Abstract
OBJECTIVE Although Warthin's tumor (WT) is one of a few salivary gland tumors that have distinct cytologic findings, it can be confused with malignant tumors at times. We assessed the overall accuracy, unusual features, and diagnostic points of fine-needle aspiration (FNA) of WT. STUDY DESIGN We retrospectively collected histologically confirmed WT from 21 patients and reviewed preoperative FNA slides. Smears were subject to immunocytochemical staining for carcinoembryonic antigen (CEA) and c-kit and compared to metastatic squamous cell carcinoma. RESULTS All of the cases were in the parotid gland; the mean size was 3.6 ± 1.2 cm. Of 21 patients, 19 were male (age 59.7 ± 9.4 years) and had a history of smoking. The initial FNA diagnoses were WT (11 patients, 52.4%), benign lesion (7 patients, 33.3%), and malignant neoplasm (3 patients, 14.3%). Only 6 patients (28.6%) showed typical FNA features of WT. The dominant cell types in the smears were macrophages (76.2%), squamous-like cells (66.7%), oncocytes (61.9%), and lymphoid cells (57.1%). Some showed atypical degenerated features, a necrotic background, and inflammatory cells, leading to misdiagnosis. CEA positivity and c-kit positivity in WT were noted in 0 and 75.0% of cases, respectively, whereas metastatic squamous cell carcinoma showed positive rates of 16.7 and 0%, respectively. CONCLUSION Awareness of potential sources of misdiagnosis together with combination of c-kit/CEA immunostaining may result in an increased diagnostic rate of WT in FNA.
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Choi YJ, Lee DH, Kim JY, Kwon JE, Kim JY, Jo HJ, Shin CM, Kim HY, Park YS, Kim N, Jung HC, Song IS. Low Grade Gastric Mucosa-associated Lymphoid Tissue Lymphoma: Clinicopathological Factors Associated with Helicobacter pylori Eradication and Tumor Regression. Clin Endosc 2011; 44:101-8. [PMID: 22741120 PMCID: PMC3363061 DOI: 10.5946/ce.2011.44.2.101] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2011] [Revised: 08/26/2011] [Accepted: 09/05/2011] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND/AIMS Eradication of Helicobacter pylori is widely accepted as initial therapy for low-grade gastric mucosa-associated lymphoid tissue (MALT) lymphoma. However, approximately 20% of patients with this disease are not responsive to H. pylori eradication therapy. The aim of this study was to assess remission and relapse rates of low-grade gastric MALT lymphoma after H. pylori eradication and identify the clinical factors that affect remission. METHODS Thirty-nine patients diagnosed with gastric MALT lymphoma (May 2003 to May 2010) were retrospectively analyzed. RESULTS Of the 39 patients, 30 (77%) had a H. pylori infection. There were 35/39 (90%) patients with stage I. Among stage I, 25 patients with the infection underwent eradication therapy and 22/25 (88%) achieved remission. The total regression rate with eradication only in stage I was 24/28 (86%). The median time to remission was 98 days (range, 22 to 397 days). Age, tumor location, invasion depth, H. pylori burden, and severity of mononuclear leukocyte and neutrophil infiltration were not related to remission. However, patients with less neutrophil infiltration were more likely to achieve a successful first H. pylori eradication (p=0.049). CONCLUSIONS The results show that the rate of low-grade gastric MALT lymphoma regression (86%) with H. pylori eradication alone was higher than that in Western studies (77.8%) and that neutrophil infiltration was inversely related to success of the first H. pylori eradication procedure.
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Park K, Han S, Kim JY, Kim HJ, Kwon JE, Gwak G. Silver-Enhanced In Situ Hybridization as an Alternative to Fluorescence In Situ Hybridization for Assaying HER2 Amplification in Clinical Breast Cancer. J Breast Cancer 2011; 14:276-82. [PMID: 22323913 PMCID: PMC3268923 DOI: 10.4048/jbc.2011.14.4.276] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Accepted: 10/31/2011] [Indexed: 11/30/2022] Open
Abstract
Purpose Valid determination of HER2 status is a prerequisite to establish an adequate treatment strategy for breast cancer patients, regardless of the disease stage. The goal of this study was to examine the feasibility of the newly developed silver-enhanced in situ hybridization (SISH) technique as an alternative to fluorescence in situ hybridization (FISH) for HER2 assay in primary invasive breast cancer. Methods FISH and SISH for HER2 amplification were performed using tissue microarray. Both methods were used in 257 consecutive primary breast cancers. Results HER2 amplification was observed in 62 (23.1%) of a total of 257 breast cancers based on SISH. Of the 257 breast cancers measured using both methods, the results of the two methods were consistent in 248 (concordance, 96.5%; kappa=0.903). When we compared HER2 amplification in the primary tumor with the metastatic lymph nodes of the same patients, HER2 amplification was observed in nine cases (14.0%) out of 64 cases in which HER2 was not amplified in the primary tumors. In contrast, HER2 status was completely preserved in metastatic lymph nodes showing HER2 amplification in the primary tumor. Conclusion These results indicate that SISH can be a feasible alternative to FISH in the clinical setting. In node-positive breast cancer, confirmation of the HER2 status of the metastatic lymph nodes appears to be mandatory, regardless of the HER2 status of the primary tumors.
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Noh S, Kwon JE, Lee KG, Roh MR. Folliculosebaceous cystic hamartoma in a patient with neurofibromatosis type I. Ann Dermatol 2011; 23:S185-7. [PMID: 22148046 PMCID: PMC3229061 DOI: 10.5021/ad.2011.23.s2.s185] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Revised: 01/27/2011] [Accepted: 02/08/2011] [Indexed: 11/15/2022] Open
Abstract
Folliculosebaceous cystic hamartoma (FSCH) is a rare cutaneous hamartoma composed of dilated folliculosebaceous units and mesenchymal elements. It presents as a papule or nodule usually on the face and scalp, rarely on the genital or trunk area. Histologically, FSCH shares several similar features to sebaceous trichofolliculoma. We report one case of FSCH misdiagnosed as a neurofibroma. He was a 38-year-old man with a neurofibromatosis type I and a nodule on his left earlobe was excised under the impression of neurofibroma. Pathological examination revealed FSCH. Although FSCH is clinically not distinctive, awareness of the lesion is important to differentiate papulonodular or cyst-like cutaneous lesions.
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Kim JY, Kwon JE, Kim HJ, Park K. Fine-needle aspiration cytology of abdominal wall endometriosis: a study of 10 cases. Diagn Cytopathol 2011; 41:115-9. [PMID: 21987456 DOI: 10.1002/dc.21779] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2011] [Revised: 05/31/2011] [Accepted: 06/12/2011] [Indexed: 11/09/2022]
Abstract
While about 15% of menstruating women develop endometriosis, abdominal wall endometriosis is relatively rare. We present 10 cases of abdominal wall endometriosis diagnosed by fine-needle aspiration (FNA) cytology and confirmed by subsequent surgical excision. A palpable abdominal wall mass was the most common symptom, followed by pain. Nine cases were associated with previous surgery. The smear showed glandular epithelial cells and spindle or ovoid stromal cells accompanied by macrophages in eight cases. The nucleus was round-to-oval and the nucleolus was inconspicuous. Mitosis was not observed in any case. In two cases, which were suspicious of malignancy on FNA, the epithelial cells showed anisonucleosis, hyperchromasia, and small conspicuous nucleoli. The stromal cells were spindle or ovoid in shape, without metaplastic changes. Histiocytes were noted in nine cases and hemosiderin-laden histiocytes were noted in two cases. The proportion of inflammatory cells varied. FNA diagnosis of abdominal wall endometriosis is possible when the cytological features are interpreted cautiously, together with the patient's clinical history. An accurate diagnosis on FNA will prevent unnecessary surgery.
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Kim JY, Bae BN, Kwon JE, Kim HJ, Park K. Prognostic significance of epidermal growth factor receptor and vascular endothelial growth factor receptor in colorectal adenocarcinoma. APMIS 2011; 119:449-59. [PMID: 21635552 DOI: 10.1111/j.1600-0463.2011.02752.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The purpose of this study was to evaluate the association between the expression of growth factors and the clinicopathological variables of colorectal adenocarcinoma. Immunohistochemistry and fluorescence in situ hybridization (FISH) were used to evaluate the amplification and expression of epidermal growth factor receptor (EGFR), vascular endothelial growth factor (VEGF), VEGF-D, VEGF receptor (VEGFR)-2, VEGFR-3, transforming growth factor (TGF)-β1, and insulin-like growth factor-1 receptor (IGF-1R) in a tissue microarray of 292 colorectal adenocarcinomas. The expression of EGFR, VEGF, VEGF-D, VEGFR-2 and VEGFR-3 was detected in 5.1%, 10.0%, 6.8%, 5.2%, and 57.2%. EGFR expression was associated with angioinvasion (p < 0.05) and lymph node metastasis (p < 0.005). VEGFR-3 expression was higher in the rectum than in the colon (p < 0.05). VEGF expression correlated with VEGF-D (p < 0.05) and VEGFR-3 (p < 0.005) expression, while VEGF-D expression showed no significant association with VEGFR-2 or VEGFR-3. EGFR amplification was present in 10.6% and was not associated with EGFR protein expression. VEGFR-2 and VEGFR-3 expression levels were related to poor patient survival. Stage, perineural invasion, and lymph node metastasis were independent prognostic factors based on a Cox analysis. VEGFR-2 and VEGFR-3 expression are markers of a poor prognosis in patients with surgically resected colorectal adenocarcinoma, whereas EGFR has a minor influence.
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Choi SK, Kwon JE, Ko YH. Fine-Needle Aspiration Cytology of the Nodal Marginal Zone Lymphoma. KOREAN JOURNAL OF PATHOLOGY 2011. [DOI: 10.4132/koreanjpathol.2011.45.4.406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Bae JH, Kwon JE, Yang WI, Lee SC. Adenoma of the nonpigmented ciliary epithelium presenting with recurrent iridocyclitis: unique expression of glial fibrillary acidic protein. Graefes Arch Clin Exp Ophthalmol 2010; 249:1747-9. [PMID: 21088853 PMCID: PMC3203225 DOI: 10.1007/s00417-010-1559-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Revised: 10/18/2010] [Accepted: 10/21/2010] [Indexed: 11/26/2022] Open
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Park JM, Roh MR, Kwon JE, Lee KY, Yoon TY, Lee MG, Kim HJ. A case of generalized dermatitis neglecta mimicking psoriasis vulgaris. ACTA ACUST UNITED AC 2010; 146:1050-1. [PMID: 20855717 DOI: 10.1001/archdermatol.2010.228] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Lee SH, Kwon JE, Lee KG, Roh MR. Granulomatous variant of chronic pigmented purpuric dermatosis associated with hyperlipidaemia. J Eur Acad Dermatol Venereol 2010; 24:1243-5. [DOI: 10.1111/j.1468-3083.2010.03627.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cho SB, Bae BG, Kwon JE, Park JM, Bang D. Ultrastructural features of lipoatrophia semicircularis in Behçet's disease. Clin Exp Rheumatol 2010; 28:S97-S98. [PMID: 20868583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2009] [Accepted: 01/14/2010] [Indexed: 05/29/2023]
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Choi HJ, Sohn JH, Lee CG, Shim HS, Lee IJ, Yang WI, Kwon JE, Kim SK, Park MS, Lee JH, Kim JH. A phase I study of nimotuzumab in combination with radiotherapy in stages IIB-IV non-small cell lung cancer unsuitable for radical therapy: Korean results. Lung Cancer 2010; 71:55-9. [PMID: 20451284 DOI: 10.1016/j.lungcan.2010.04.010] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Revised: 04/05/2010] [Accepted: 04/06/2010] [Indexed: 12/01/2022]
Abstract
PURPOSE This study was undertaken to determine safety and tolerability of nimotuzumab, a humanized anti-epidermal growth factor receptor monoclonal antibody, in combination with radiotherapy in stages IIB-IV non-small cell lung cancer (NSCLC) patients who are unsuitable for radical therapy or chemotherapy. METHODS Nimotuzumab (100mg, 200mg and 400mg) was administered weekly from week 1 to week 8 with palliative radiotherapy (30-36 Gy, 3 Gy/day). If tumor control was achieved, nimotuzumab was continued every 2 weeks until unacceptable toxicity or disease progression. Serial skin biopsies were collected for pharmacodynamic assessment. RESULTS Fifteen patients were enrolled in the study, with cohorts of five patients assigned in each dose level of nimotuzumab. Patients and disease characteristics included median age 73 years; Eastern Cooperative Oncology Group performance status (PS) 0-1/2 (n=3/12); female sex (n=2); adenocarcinoma (n=5); never-smoker status (n=2); and stages IIB/IIIB/IV (n=1/8/6). All patients were unable to tolerate radical therapy because of old age or multiple comorbidities. The most commonly reported adverse events were lymphopenia and asthenia (grades 1-2 in most patients). No skin rash or allergic toxicities appeared. Dose-limiting toxicity occurred with pneumonia with grade 4 neutropenia at the 200mg dose of nimotuzumab. Objective response rate and disease control rate inside the radiation field were 46.7% and 100.0%, respectively. CONCLUSIONS Nimotuzumab in combination with radiotherapy is well-tolerated and feasible. Further clinical investigation of nimotuzumab in NSCLC patients is warranted.
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Choi HJ, Lee H, Kim H, Kwon JE, Kang HJ, You KT, Rhee H, Noh SH, Paik YK, Hyung WJ, Kim H. MicroRNA expression profile of gastrointestinal stromal tumors is distinguished by 14q loss and anatomic site. Int J Cancer 2010; 126:1640-50. [PMID: 19795448 DOI: 10.1002/ijc.24897] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
MicroRNAs are known to regulate gene expression. Although unique microRNA expression profiles have been reported in several tumors, little is known about microRNA expression profiles in GISTs. To evaluate the relationship between microRNA expression and clinicopathologic findings of GISTs, we analyzed the microRNA expression profiles of GISTs. We used fresh frozen tissues from 20 GISTs and analyzed KIT and PDGFRA mutations and chromosomal loss status. MicroRNA expression was analyzed using a microRNA chip containing 470 microRNAs. Using unsupervised hierarchical clustering analysis, we found four distinct microRNA expression patterns in our 20 GISTs. Six GISTs that did not have 14q loss formed a separate cluster. In the 14 GISTs with 14q loss, 5 small bowel GISTs formed a separate cluster and the remaining 9 GISTs could be divided into two groups according to frequent chromosomal losses and tumor risk. We found 73 microRNAs that were significantly down-regulated in the GISTs with 14q loss; 38 of these microRNAs are encoded on 14q. We also found many microRNAs that were down-regulated in small bowel and high-risk group GISTs. Most of the microRNAs down-regulated in the high-risk group and small bowel GISTs are known to be involved in tumor progression, specifically by stimulating mitogen-activated protein kinase (MAPK) and the cell cycle. The microRNA expression patterns of GISTs are closely related to the status of 14q loss, anatomic site, and tumor risk. These findings suggest that microRNA expression patterns can differentiate several subsets of GISTs.
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Kwon JE, Kang HJ, Kim SH, Lee YC, Hyung WJ, Noh SH, Kim NK, Kim H. Pathological characteristics of gastrointestinal stromal tumours with PDGFRA mutations. Pathology 2010; 41:544-54. [PMID: 19900103 DOI: 10.1080/00313020903071421] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AIMS The aim of this study was to identify the characteristics of PDGFRA-mutated gastrointestinal stromal tumours (GISTs) in comparison with KIT-mutated GISTs. METHODS A total of 151 GISTs were examined for KIT and PDGFRA mutations, and clinical and histopathological parameters were evaluated and analysed statistically according to mutation status. RESULTS KIT and PDGFRA mutations were detected in 123 (81.5%) and 15 cases (9.9%), respectively. Clinically, all PDGFRA-mutated GISTs were located in the stomach with no recurrences and tumour-related deaths were noted. Pathological parameters associated with PDGFRA mutations were epithelioid and mixed type, low to moderate cellularity, moderate to severe intratumoural lymphocytic infiltration, prominent myxoid change, frequent rhabdoid cells and multinucleated giant cells, increased cellular pleomorphism, low mitotic count, and lower risk assessment (p < 0.05). Compared with KIT-mutated GISTs, PDGFRA-mutated GISTs had unique histopathological patterns, intermingling of spindle and epithelioid cells, and/or a jigsaw puzzle-like arrangement of epithelioid cells. CONCLUSIONS PDGFRA-mutated GISTs have distinctive histological patterns that are differentiated from KIT-mutated GISTs. The algorithmic approach by a combination of several distinguishing histological and immunohistochemical features between KIT- and PDGFRA-mutated GISTs might be helpful in predicting the mutated gene of each GIST on pathological examination.
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Lee SH, Kwon JE, Cheong YS. Two Cases of Trichuris Trichiura Infection Diagnosed by Colonoscopy. Korean J Fam Med 2010. [DOI: 10.4082/kjfm.2010.31.8.622] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Kim MR, Lee EH, Lee SE, Kwon JE, Lee KG, Kim YC, Kim SC. Myxofibrosarcoma mimicking cutaneous myxoma. J Cutan Pathol 2009; 37:1016-8. [DOI: 10.1111/j.1600-0560.2009.01432.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Shin JA, Huh CW, Kwon JE, Kim HJ, Ahn CM, Chang YS. A Case of Docetaxel Induced Subacute Cutaneous Lupus Erythematosus. Tuberc Respir Dis (Seoul) 2009. [DOI: 10.4046/trd.2009.66.5.380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Kwon JE, Park YN. [Hepatic adenomatosis in glycogen storage disease]. THE KOREAN JOURNAL OF HEPATOLOGY 2008; 14:108-12. [PMID: 18367864 DOI: 10.3350/kjhep.2008.14.1.108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Huh JW, Park YA, Jung EJ, Lee KY, Kwon JE, Sohn SK. Complete remission of unresectable colon cancer after preoperative chemotherapy selected by adenosine triphosphate-based chemotherapy response assay. J Korean Med Sci 2008; 23:916-9. [PMID: 18955806 PMCID: PMC2579999 DOI: 10.3346/jkms.2008.23.5.916] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The adenosine triphosphate-based chemotherapy response assay (ATP-CRA) is a chemosensitivity test that offers the potential of selecting cancer treatments based on the responsiveness of individual tumors. We report a case of 47-yr-old male, presented with sigmoid colon cancer with multiple liver and peritoneal metastases, in which there was a complete response for the primary colon cancer after administration of preoperative chemotherapy selected by ATP-CRA. Oxaliplatin was the most sensitive drug based on the ATP-CRA where the specimen obtained by ultrasound- guided percutaneous liver biopsy was used. After twelve cycles of oxaliplatincapecitabine chemotherapy, abdominopelvic computed tomography revealed marked shrinkage of the liver metastases and positron emission tomography showed no uptake of 18F-fluoro-deoxy-glucose (FDG) either in the liver or peritoneum except localized uptake in the sigmoid colon. The patient underwent an anterior resection and radiofrequency ablation of the liver metastases, which resulted in a macroscopic curative resection of the cancer cells. Histological examination revealed no residual cancer cells in the resected specimen of the sigmoid colon. This result suggested that preoperative chemotherapy chosen by ATP-CRA may be useful for treating advanced colon cancer with unresectable liver and peritoneal metastases.
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Hwang HJ, Song KH, Youn YH, Kwon JE, Kim H, Chung JB, Lee YC. A case of more abundant and dysplastic adenomas in the interposed colon than in the native colon. Yonsei Med J 2007; 48:1075-8. [PMID: 18159607 PMCID: PMC2628170 DOI: 10.3349/ymj.2007.48.6.1075] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
We report a 60-year-old woman with intramucosal adenocarcinoma arising in the interposed colon, 40 years after the esophageal reconstruction for lye induced esophageal stricture. Although synchronous adenomas were also found in the native colon where the graft was taken, the number of adenomas was greater in the interposed colon and more dysplastic, even progressed to adenocarcinoma, than that of the native colon. The microsatellite instability-testing performed in the intramucosal carcinoma from interposed colon showed absence of microsatellite instability. Changing of location and functional demand of colonic segment, and the exposure to different intraluminal contents might have facilitated the adenoma- carcinoma transformation in the interposed colon.
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Abstract
OBJECTIVE This study describes the computed tomographic (CT) findings of true leiomyomas in the stomach. METHODS Eleven patients with histopathologically proven gastric true leiomyomas were finally enrolled. All cases were CD117 (c-kit) negative on immunohistochemical study. We retrospectively reviewed the CT findings of gastric true leiomyomas for the following considerations: location, morphological features (size, contour, tumor growth pattern, and enhancement pattern), and ancillary findings (ulceration and calcification). RESULTS All leiomyomas were in the cardia, with an average tumor size of 36 mm (range, 13-47 mm). Computed tomography scans revealed the morphological features as follows: tumor growth pattern: intraluminal mass (n = 10) and extraluminal masses (n = 1); contour: lobulated margin (n = 7) or smooth margin (n = 4). All lesions showed homogeneous contrast enhancement. Most of the tumors showed lower enhancement than those in the liver (n = 10). One case showed ulceration but no calcification. CONCLUSIONS In conclusion, gastric leiomyomas are mainly located in the cardia and usually appeared as homogenous low attenuated masses on computed tomography.
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Park SC, Park BH, Shin SY, Jeon HH, Chung KS, Park JC, Jeong J, Kwon JE, Park MS, Kim SK, Chang J, Kim SK, Kim YS. A Case of Lymphangioleiomyomatosis Presenting as a Lung Mass. Tuberc Respir Dis (Seoul) 2007. [DOI: 10.4046/trd.2007.63.3.289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Kwon JE, Kim SH, Cho NH. No ancillary finding is valid to distinguish a primary ovarian hepatoid carcinoma from metastatic hepatocellular carcinoma. Int J Gynecol Cancer 2006; 16:1691-4. [PMID: 16884387 DOI: 10.1111/j.1525-1438.2006.00646.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Primary ovarian hepatoid carcinomas (POHC) are extremely rare. Especially rare are those with phenotypic properties of hepatocellular carcinoma (HCC) and an absence of clinical evidence of hepatic tumor. We report a case of a POHC with a common microscopic, immunophenotypic, and ultrastructural property of HCC in the absence of a liver mass. It is extremely difficult to differentiate POHC from metastatic HCC using any kinds of ancillary studies, with the exception of clinical identification of a hepatic tumor.
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