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Kim M, Lee TY, Kang BS, Kwon WJ, Lim S, Park GM, Bang M. Evaluating Biliary Malignancy with Measured and Calculated Ultra-high b-value Diffusion-weighted MR Imaging at 3T. Magn Reson Med Sci 2023. [PMID: 37183027 DOI: 10.2463/mrms.mp.2022-0144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023] Open
Abstract
PURPOSE Although diffusion-weighted imaging (DWI) with ultra-high b-values is reported to be advantageous in the detection of some tumors, its applicability is not yet known in biliary malignancy. Therefore, this study aimed to evaluate the impact of measured b = 1400 s/mm2 (M1400) and calculated b = 1400 s/mm2 (C1400) DWI on image quality and quality of lesion discernibility using a modern 3T MR system compared to conventional b = 800 s/mm2 DWI (M800). METHODS We evaluated 56 patients who had pathologically proven biliary malignancy. All the patients underwent preoperative or baseline 3T MRI using DWI (b = 50, 400, 800, and 1400 s/mm2). The calculated DWI was obtained using a conventional DWI set (b = 50, 400, and 800). The tumor-to-bile contrast ratio (CR) and tumor SNR were compared between the different DWI images. Likert scores were given on a 5-point scale to assess the overall image quality, overall artifacts, ghost artifacts, misregistration artifacts, margin sharpness, and lesion discernibility. Repeated-measures analysis of variance with post hoc analyses was used for statistical evaluations. RESULTS The CR of the tumor-to-bile was significantly higher in both M1400 and C1400 than in M800 (Pa < 0.01). SNRs were significantly higher in M800, followed by C1400 and M1400 (Pa < 0.01). Lesion discernibility was significantly improved for M1400, followed by C1400 and M800 for both readers (Pa < 0.01). CONCLUSION Using a 3T MRI, both measured and calculated DWI with an ultra-high b-value offer superior lesion discernibility for biliary malignancy compared to the conventional DWI.
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Affiliation(s)
- Minkyeong Kim
- Department of Radiology, Ulsan University Hospital, University of Ulsan College of Medicine
| | - Tae Young Lee
- Department of Radiology, Ulsan University Hospital, University of Ulsan College of Medicine
| | - Byeong Seong Kang
- Department of Radiology, Ulsan University Hospital, University of Ulsan College of Medicine
| | - Woon Jung Kwon
- Department of Radiology, Ulsan University Hospital, University of Ulsan College of Medicine
| | - Soyeoun Lim
- Department of Radiology, Ulsan University Hospital, University of Ulsan College of Medicine
| | - Gyeong Min Park
- Department of Radiology, Ulsan University Hospital, University of Ulsan College of Medicine
| | - Minseo Bang
- Department of Radiology, Ulsan University Hospital, University of Ulsan College of Medicine
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Min B, Yang B, Kim YS, Park GM, Kim H, Kim H, Kim EJ, Hwang YK, Shin EC, Cho S. Harnessing novel engineered feeder cells expressing activating molecules for optimal expansion of NK cells with potent antitumor activity. Cell Mol Immunol 2022; 19:296-298. [PMID: 34580436 PMCID: PMC8803962 DOI: 10.1038/s41423-021-00759-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 08/07/2021] [Indexed: 12/27/2022] Open
Affiliation(s)
- Bokyung Min
- grid.37172.300000 0001 2292 0500BioMedical Science and Engineering Interdisciplinary Program, KAIST, Daejeon, Korea ,Cell Therapy Research Center, GC LabCell, Yongin, Korea ,grid.37172.300000 0001 2292 0500Laboratory of Immunology and Infectious Diseases, Graduate School of Medical Science and Engineering, KAIST, Daejeon, Korea
| | - Bitna Yang
- Cell Therapy Research Center, GC LabCell, Yongin, Korea
| | - You-Sun Kim
- Cell Therapy Research Center, GC LabCell, Yongin, Korea
| | | | - HyunAh Kim
- Cell Therapy Research Center, GC LabCell, Yongin, Korea
| | - Hyojin Kim
- Cell Therapy Research Center, GC LabCell, Yongin, Korea
| | - Eun-Ji Kim
- Cell Therapy Research Center, GC LabCell, Yongin, Korea
| | | | - Eui-Cheol Shin
- grid.37172.300000 0001 2292 0500BioMedical Science and Engineering Interdisciplinary Program, KAIST, Daejeon, Korea ,grid.37172.300000 0001 2292 0500Laboratory of Immunology and Infectious Diseases, Graduate School of Medical Science and Engineering, KAIST, Daejeon, Korea
| | - Sungyoo Cho
- Cell Therapy Research Center, GC LabCell, Yongin, Korea
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Kim HY, Kim ST, Kim HJ, Jeon P, Byun HS, Kim YK, Cha J, Park GM, Nam DH, Kong DS. Differentiation of postoperative changes and residual tumors in dynamic contrast-enhanced sella MRI after transsphenoidal resection of pituitary adenoma. Medicine (Baltimore) 2019; 98:e16089. [PMID: 31277105 PMCID: PMC6635295 DOI: 10.1097/md.0000000000016089] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [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
To establish magnetic resonance imaging (MRI) features that differentiate residual tumors from postoperative surgical changes following the transsphenoidal approach of a pituitary adenoma.We analyzed residual enhancements at the tumor bed in 52 patients who underwent dynamic contrast-enhanced sella MRI within 48 hours after surgery and at 6 to 28 months. Patients were divided into 2 groups defined by either peripheral or nodular enhancement patterns. For each group, we measured the maximum thickness of the residual enhancing portion and compared differences in the residual tumor and postoperative changes.Among the tumors examined in the 52 patients, 19 residual tumors showed nodular (n = 16) and peripheral (n = 3) enhancement patterns, and 33 postoperative changes showed nodular (n = 3) and peripheral (n = 30) enhancement patterns. The mean residual tumor thickness was 7.1 mm (range, 2.9-16.8 mm) and 1.9 mm (range, 1.0-7.4 mm) in the postoperative change. Receiver operating characteristic curve analysis revealed that a 3.9-mm thickness was associated with 89% sensitivity, 97% specificity, and 94% accuracy for diagnosis of residual tumor.On immediate postoperative MRI, residual enhancement with greater than 3.9-mm thickness and nodular pattern suggest residual pituitary adenoma tumor.
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Affiliation(s)
- Ha Youn Kim
- Department of Radiology, Eulji University Hospital, Daejeon
| | - Sung Tae Kim
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine
| | - Hyung-Jin Kim
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine
| | - Pyoung Jeon
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine
| | - Hong Sik Byun
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine
| | - Yi Kyung Kim
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine
| | - Jihoon Cha
- Department of Radiology and Research Institute of Radiological Science, Yonsei University College of Medicine, Seoul
| | - Gyeong Min Park
- Department of Radiology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan
| | - Do-Hyun Nam
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Doo-Sik Kong
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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Kang BS, Shim HS, Kim JH, Kim YM, Bang M, Lim S, Park GM, Lee TY, Ha ND, Kwon WJ. Angioleiomyoma of the Extremities: Findings on Ultrasonography and Magnetic Resonance Imaging. J Ultrasound Med 2019; 38:1201-1208. [PMID: 30208227 DOI: 10.1002/jum.14798] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 07/03/2018] [Accepted: 07/27/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVES The purpose of this study was to describe the features of angioleiomyomas of the extremities on ultrasonography (US) and magnetic resonance imaging (MRI). METHODS We retrospectively reviewed the US and MRI findings of 29 pathologically confirmed cases of angioleiomyomas of the extremities in 29 patients. Twenty patients underwent only US; 7 patients underwent only MRI; and 2 patients underwent US and MRI. Clinical data and histopathologic specimens were reviewed. RESULTS There were 19 women and 10 men. The mean patient age was 48.9 years (range, 23-80 years). On US, angioleiomyomas were located primarily in the subcutaneous fat layer (n = 20 [91%]), were oval (n = 17 [77%]), had well-circumscribed margins (n = 22 [100%]), had hypoechoic protrusions on one or both ends (n = 9 [41%]), had a homogeneous echo texture (n = 17 [ 77%]), had posterior acoustic enhancement (n = 20 [91%]), and had color Doppler flow (n = 20 [91%]). On MRI, the masses showed heterogeneous enhancement (n = 7 [88%]) and enhancing structures on one or both ends (n = 4 [50%]) on contrast-enhanced T1-weighted images. CONCLUSIONS Angioleiomyoma of the extremities is usually a well-circumscribed oval mass with a homogeneous echo texture and occasionally hypoechoic protrusions on US and shows heterogeneous enhancement with occasionally enhancing structures on one or both ends of the mass on MRI. Therefore, it should be included in the differential diagnosis of a soft tissue mass that has protruding structures from one or both ends.
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Affiliation(s)
- Byeong Seong Kang
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
| | - Hyun Seok Shim
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
| | - Ji Hye Kim
- Department of Pathology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
| | - Young-Min Kim
- Department of Pathology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
| | - Minseo Bang
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
| | - Soyeoun Lim
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
| | - Gyeong Min Park
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
| | - Tae Young Lee
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
| | - Nam-Du Ha
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
| | - Woon Jung Kwon
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Korea
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Kang BS, Shim HS, Kwon WJ, Lim S, Park GM, Lee TY, Bang M. MRI findings for unilateral sternoclavicular arthritis: differentiation between infectious arthritis and spondyloarthritis. Skeletal Radiol 2019; 48:259-266. [PMID: 29978244 DOI: 10.1007/s00256-018-3023-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 06/19/2018] [Accepted: 06/24/2018] [Indexed: 02/02/2023]
Abstract
OBJECTIVES To analyze and identify magnetic resonance imaging (MRI) and clinical findings for the differentiation between infectious arthritis and spondyloarthritis in patients with unilateral sternoclavicular arthritis. MATERIALS AND METHODS We retrospectively collected and evaluated the magnetic resonance (MR) images of 21 patients diagnosed with unilateral sternoclavicular arthritis, including 12 with infection and nine with spondyloarthritis, between 2004 and 2017. Capsular distension, extracapsular fluid collection, periarticular muscle edema, the prevalence and distribution of bone marrow edema, and the prevalence and size of bone erosions were assessed on the MR images. Clinical data were also reviewed. RESULTS Capsular distension was more prominent in patients with infectious arthritis than those with spondyloarthritis (p = 0.002); extracapsular fluid collection and periarticular muscle edema were also more common in infectious arthritis than spondyloarthritis (p < 0.001, respectively); moreover, bone erosions were larger in infectious arthritis than spondyloarthritis (p = 0.023). Other findings significantly associated with infectious arthritis included advanced age (p = 0.007), an elevated C-reactive protein (CRP) level (p = 0.001), and erythrocyte sedimentation rate (ESR) (p < 0.001). The prevalence and distribution of bone marrow edema and the prevalence of bone erosions on MRI, the white blood cell count, and sex showed no significant differences between the two groups. CONCLUSIONS Capsular distension, extracapsular fluid collection, periarticular muscle edema, and the size of bone erosions on MRI, as well as the age, CRP level, and ESR of patients, could be helpful for differentiating infectious arthritis from spondyloarthritis involving the sternoclavicular joint.
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Affiliation(s)
- Byeong Seong Kang
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, 877 Bangeojinsunhwan-doro, Dong-gu, Ulsan, 44033, South Korea.
| | - Hyun Seok Shim
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, 877 Bangeojinsunhwan-doro, Dong-gu, Ulsan, 44033, South Korea
| | - Woon Jung Kwon
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, 877 Bangeojinsunhwan-doro, Dong-gu, Ulsan, 44033, South Korea
| | - Soyeoun Lim
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, 877 Bangeojinsunhwan-doro, Dong-gu, Ulsan, 44033, South Korea
| | - Gyeong Min Park
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, 877 Bangeojinsunhwan-doro, Dong-gu, Ulsan, 44033, South Korea
| | - Tae Young Lee
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, 877 Bangeojinsunhwan-doro, Dong-gu, Ulsan, 44033, South Korea
| | - Minseo Bang
- Department of Radiology, University of Ulsan College of Medicine, Ulsan University Hospital, 877 Bangeojinsunhwan-doro, Dong-gu, Ulsan, 44033, South Korea
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Kim YK, Choi JW, Kim HJ, Kim HY, Park GM, Ko YH, Cha J, Kim ST. Melanoma of the Sinonasal Tract: Value of a Septate Pattern on Precontrast T1-Weighted MR Imaging. AJNR Am J Neuroradiol 2018; 39:762-767. [PMID: 29371259 DOI: 10.3174/ajnr.a5539] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 11/20/2017] [Indexed: 12/22/2022]
Abstract
BACKGROUND AND PURPOSE Various tumors of the sinonasal tract can exhibit high signal intensity on T1WI. The purpose of this study was to determine the value of a septate pattern on precontrast T1WI for diagnosing sinonasal melanoma. MATERIALS AND METHODS Retrospectively, 3 observers independently reviewed MR images of 31 histologically proved sinonasal melanomas with special attention to the presence or absence of a septate pattern on precontrast T1WI, defined as alternating hyperintense and hypointense striations on precontrast T1WI. For comparison, we evaluated the prevalence of a septate pattern on precontrast T1WI in 106 nonmelanomatous sinonasal malignant tumors with 16 different histologic types. We also tried to identify the histopathologic features responsible for the septate pattern on precontrast T1WI. RESULTS Twenty-seven (87.1%) of 31 sinonasal melanomas showed hyperintense foci on T1WI, among which a septate pattern on precontrast T1WI was seen in 23 (74.2%), while 22 (20.8%) of 106 nonmelanomatous malignant tumors demonstrated hyperintense foci on T1WI, among which only 3 (2.8%) showed a septate pattern on precontrast T1WI. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of a septate pattern on precontrast T1WI for the diagnosis of sinonasal melanoma were 74%, 97%, 88%, 93%, and 92%, respectively. Although limited due to the retrospective nature, 4 of 23 histologically reviewed sinonasal melanomas revealed an uneven distribution of melanin with alternating melanin and fibrous bands within the tumors. CONCLUSIONS A septate pattern on precontrast T1WI might be an adjunctive imaging finding for the diagnosis of sinonasal melanoma. This might be attributed histologically to an uneven distribution of melanin and hemorrhage within the tumors.
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Affiliation(s)
- Y-K Kim
- From the Departments of Radiology (Y.-K.K., H.-J.K., H.Y.K., G.M.P., J.C., S.T.K.)
| | - J W Choi
- Department of Radiology (J.W.C.), Ajou University School of Medicine, Suwon, Korea
| | - H-J Kim
- From the Departments of Radiology (Y.-K.K., H.-J.K., H.Y.K., G.M.P., J.C., S.T.K.)
| | - H Y Kim
- From the Departments of Radiology (Y.-K.K., H.-J.K., H.Y.K., G.M.P., J.C., S.T.K.)
| | - G M Park
- From the Departments of Radiology (Y.-K.K., H.-J.K., H.Y.K., G.M.P., J.C., S.T.K.).,Department of Radiology (G.M.P.), Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea
| | - Y-H Ko
- Pathology (Y.-H.K.), Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J Cha
- From the Departments of Radiology (Y.-K.K., H.-J.K., H.Y.K., G.M.P., J.C., S.T.K.).,Department of Radiology and Research Institute of Radiological Science (J.C.), College of Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - S T Kim
- From the Departments of Radiology (Y.-K.K., H.-J.K., H.Y.K., G.M.P., J.C., S.T.K.)
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Cha J, Kim HJ, Kim ST, Kim YK, Kim HY, Park GM. Dual-energy CT with virtual monochromatic images and metal artifact reduction software for reducing metallic dental artifacts. Acta Radiol 2017; 58:1312-1319. [PMID: 28273739 DOI: 10.1177/0284185117692174] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background Metallic dental prostheses may degrade image quality on head and neck computed tomography (CT). However, there is little information available on the use of dual-energy CT (DECT) and metal artifact reduction software (MARS) in the head and neck regions to reduce metallic dental artifacts. Purpose To assess the usefulness of DECT with virtual monochromatic imaging and MARS to reduce metallic dental artifacts. Material and Methods DECT was performed using fast kilovoltage (kV)-switching between 80-kV and 140-kV in 20 patients with metallic dental prostheses. CT data were reconstructed with and without MARS, and with synthesized monochromatic energy in the range of 40-140-kiloelectron volt (keV). For quantitative analysis, the artifact index of the tongue, buccal, and parotid areas was calculated for each scan. For qualitative analysis, two radiologists evaluated 70-keV and 100-keV images with and without MARS for tongue, buccal, parotid areas, and metallic denture. The locations and characteristics of the MARS-related artifacts, if any, were also recorded. Results DECT with MARS markedly reduced metallic dental artifacts and improved image quality in the buccal area ( P < 0.001) and the tongue ( P < 0.001), but not in the parotid area. The margin and internal architecture of the metallic dentures were more clearly delineated with MARS ( P < 0.001) and in the higher-energy images than in the lower-energy images ( P = 0.042). MARS-related artifacts most commonly occurred in the deep center of the neck. Conclusion DECT with MARS can reduce metallic dental artifacts and improve delineation of the metallic prosthesis and periprosthetic region.
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Affiliation(s)
- Jihoon Cha
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
- Imaging Center, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Hyung-Jin Kim
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Sung Tae Kim
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Yi Kyung Kim
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Ha Youn Kim
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Gyeong Min Park
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Kim HY, Hwang JY, Kim HJ, Kim YK, Cha J, Park GM, Kim ST. CT, MRI, and 18F-FDG PET/CT findings of malignant peripheral nerve sheath tumor of the head and neck. Acta Radiol 2017; 58:1222-1230. [PMID: 28068826 DOI: 10.1177/0284185116684674] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Background Malignant peripheral nerve sheath tumor (MPNST) is a highly malignant tumor and rarely occurs in the head and neck. Purpose To describe the imaging features of MPNST of the head and neck. Material and Methods We retrospectively analyzed computed tomography (CT; n = 14), magnetic resonance imaging (MRI; n = 16), and 18F-FDG PET/CT (n = 5) imaging features of 18 MPNSTs of the head and neck in 17 patients. Special attention was paid to determine the nerve of origin from which the tumor might have arisen. Results All lesions were well-defined (n = 3) or ill-defined (n = 15) masses (mean, 6.1 cm). Lesions were at various locations but most commonly the neck (n = 8), followed by the intracranial cavity (n = 3), paranasal sinus (n = 2), and orbit (n = 2). The nerve of origin was inferred for 11 lesions: seven in the neck, two in the orbit, one in the cerebellopontine angle, and one on the parietal scalp. Attenuation, signal intensity, and enhancement pattern of the lesions on CT and MRI were non-specific. Necrosis/hemorrhage/cystic change within the lesion was considered to be present on images in 13 and bone change in nine. On 18F-FDG PET/CT images, all five lesions demonstrated various hypermetabolic foci with maximum standard uptake value (SUVmax) from 3.2 to 14.6 (mean, 7.16 ± 4.57). Conclusion MPNSTs can arise from various locations in the head and neck. Though non-specific, a mass with an ill-defined margin along the presumed course of the cranial nerves may aid the diagnosis of MPSNT in the head and neck.
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Affiliation(s)
- Ha Youn Kim
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Ji Young Hwang
- Department of Radiology, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Seoul, Republic of Korea
| | - Hyung-Jin Kim
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Yi Kyung Kim
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Jihoon Cha
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Gyeong Min Park
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Sung Tae Kim
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Jung H, Byun JY, Kim HJ, Min JH, Park GM, Kim HY, Kim YK, Cha J, Kim ST. Prognostic CT findings of diplopia after surgical repair of pure orbital blowout fracture. J Craniomaxillofac Surg 2016; 44:1479-84. [PMID: 27427337 DOI: 10.1016/j.jcms.2016.06.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 05/19/2016] [Accepted: 06/27/2016] [Indexed: 11/28/2022] Open
Abstract
PURPOSE Diplopia is a common sequela of blowout fracture even after proper surgical management. We investigated the prognostic factors of diplopia after surgery of pure blowout fracture. MATERIALS AND METHODS We retrospectively reviewed CT images of 181 patients with pure orbital blowout fracture who underwent at least six months of postoperative follow-up. We evaluated the following CT factors: (1) fracture site (orbital floor, medial wall of the orbit, or both), (2) fracture type (closed flap, open flap), (3) fracture size, (4) volume of herniated orbital soft tissue, (5) ratio of volume of herniated orbital soft tissue to fracture size, (6) number of points of contact between extraocular muscle (EOM) and bony edge, (7) presence of EOM thickening, (8) EOM swelling ratio, (9) presence of displacement of EOM, (10) presence of deformity of EOM, (11) presence of tenting of EOM, and (12) presence of entrapment of EOM. The associations between diplopia at six months after surgical repair and various risk factors were analyzed using logistic regression models for univariable and multivariable analyses. RESULTS EOM tenting and deformity and ratio of volume of herniated orbital soft tissue to fracture size were found to be statistically significant risk factors of diplopia at six months after repair on univariable analysis (all P < 0.05). Patients who showed EOM tenting or deformity on CT images had 5.22 and 10.85 times greater probability of diplopia after surgery, respectively (P-value, <0.001 and 0.026; 95% confidence interval of odds ratio, 2.071-13.174 and 1.323-88.915, respectively). On the other hand, ratio of volume of herniated orbital soft tissue to fracture size was not significant on multivariable analysis (P = 0.472). CONCLUSION The prognosis of patients was predicted by CT evaluation. Patients who have tenting or deformity of EOM on CT scan are more likely to have postoperative diplopia.
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Affiliation(s)
- Hyena Jung
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Jae Young Byun
- Department of Radiology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul 06591, Republic of Korea.
| | - Hyung-Jin Kim
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Ji Hye Min
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Gyeong Min Park
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Ha Youn Kim
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Yi Kyung Kim
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Jihoon Cha
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
| | - Sung Tae Kim
- Department of Radiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul 06351, Republic of Korea
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Cha J, Kim ST, Nam DH, Kong DS, Kim HJ, Kim YK, Kim HY, Park GM, Jeon P, Kim KH, Byun HS. Differentiation of Hemangioblastoma from Metastatic Brain Tumor using Dynamic Contrast-enhanced MR Imaging. Clin Neuroradiol 2016; 27:329-334. [PMID: 26952018 DOI: 10.1007/s00062-016-0508-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Accepted: 02/18/2016] [Indexed: 12/11/2022]
Abstract
PURPOSE The aim of this study was to differentiate hemangioblastomas from metastatic brain tumors using dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) and compare the diagnostic performances with diffusion-weighted imaging (DWI) and dynamic susceptibility contrast magnetic resonance imaging (DSC-MRI). METHODS We retrospectively reviewed 7 patients with hemangioblastoma and 15 patients with metastatic adenocarcinoma with magnetic resonance imaging (MRI) including DWI, DSC-MRI, and DCE-MRI. Apparent diffusion coefficient (ADC), relative cerebral blood volume (rCBV), and DCE-MRI parameters (K trans, k ep, v e, and v p) were compared between the two groups. The diagnostic performance of each parameter was evaluated with receiver operating characteristic (ROC) curve analysis. RESULTS v p, k ep, and rCBV were significantly different between patients with hemangioblastoma and those with metastatic brain tumor (p < 0.001, p = 0.005, and p = 0.017, respectively). A v p cutoff value of 0.012 and a rCBV cutoff value of 8.0 showed the highest accuracy for differentiating hemangioblastoma from metastasis. The area under the ROC curve for v p and rCBV was 0.99 and 0.89, respectively. A v p > 0.012 showed 100 % sensitivity, 93.3 % specificity, and 95.5 % accuracy and a rCBV > 8.0 showed 85.7 % sensitivity, 93.3 % specificity, and 90.9 % accuracy for differentiating hemangioblastoma from metastatic brain tumor. CONCLUSION DCE-MRI was useful for differentiating hemangioblastoma from metastatic brain tumor.
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Affiliation(s)
- J Cha
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81, Irwon-ro, Gangnam-gu, 135-710, Seoul, Republic of Korea.,Cardiovascular and Stroke Imaging Center, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - S T Kim
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81, Irwon-ro, Gangnam-gu, 135-710, Seoul, Republic of Korea.
| | - D-H Nam
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - D-S Kong
- Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - H-J Kim
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81, Irwon-ro, Gangnam-gu, 135-710, Seoul, Republic of Korea
| | - Y K Kim
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81, Irwon-ro, Gangnam-gu, 135-710, Seoul, Republic of Korea
| | - H Y Kim
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81, Irwon-ro, Gangnam-gu, 135-710, Seoul, Republic of Korea
| | - G M Park
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81, Irwon-ro, Gangnam-gu, 135-710, Seoul, Republic of Korea
| | - P Jeon
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81, Irwon-ro, Gangnam-gu, 135-710, Seoul, Republic of Korea
| | - K H Kim
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81, Irwon-ro, Gangnam-gu, 135-710, Seoul, Republic of Korea
| | - H S Byun
- Department of Radiology and Center for Imaging Science, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81, Irwon-ro, Gangnam-gu, 135-710, Seoul, Republic of Korea
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11
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Jeon K, Choi WI, An JS, Lim SY, Kim WJ, Park GM, Park SS, Choi HS, Lee BH, Choi JC, Na MJ, Park J, Kim JY. Paradoxical response in HIV-negative patients with pleural tuberculosis: a retrospective multicentre study. Int J Tuberc Lung Dis 2012; 16:846-51. [PMID: 22507441 DOI: 10.5588/ijtld.11.0642] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To evaluate the incidence, clinical characteristics and predicting factors for the development of paradoxical response in human immunodeficiency virus negative patients with isolated pleural tuberculosis (TB). DESIGN A multicentre, retrospective cohort study including 458 patients who were diagnosed and treated with isolated pleural TB between March 2005 and February 2010. RESULTS Paradoxical response developed in 72 patients (16%) with isolated pleural TB. The mean time to development of paradoxical response was 8.8 ± 6.4 weeks after initiation of anti-tuberculosis treatment. The main presentation of paradoxical response was aggravation of pre-existing pleural effusion in 58 patients (81%). However, the majority of the patients who developed paradoxical response had no associated symptoms (n = 49, 68%). In multiple logistic regression analysis, development of paradoxical response was independently associated with the proportion of eosinophils (adjusted OR 1.293, 95%CI 1.077-1.553) and protein concentrations (adjusted OR 0.590, 95%CI 0.397-0.878) in the pleural fluid at the time of diagnosis. CONCLUSION Paradoxical response developed in 16% of the patients approximately 2 months after initiation of anti-tuberculosis treatment, presenting with aggravation of pre-existing pleural effusion. Development of paradoxical response was associated with the proportion of eosinophils and protein concentrations in the pleural fluid at the time of diagnosis.
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Affiliation(s)
- K Jeon
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea
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Park YK, Soh CT, Park GM, Hwang MK, Chung PR. Host Specificity of Pisidium coreanum (Bivalvia: Sphaeriidae) to Larval Infection with a Human Intestinal Fluke Echinostoma cinetorchis (Trematoda: Echinostomatidae) in Korea. J Parasitol 2006; 92:1118-20. [PMID: 17152966 DOI: 10.1645/ge-787r1.1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The fingernail clam, Pisidium coreanum, has been traditionally consumed raw as a so-called drug therapy by patients with bone fractures in Korea. The present study was designed to determine the possible occurrence and, if present, the prevalence of Echinostoma cinetorchis in P. coreanum collected at a local site, and to determine the susceptibility of the clams in the laboratory to infection with miracidia and cercariae of E. cinetorchis. No cercariae or metacercariae of E. cinetorchis were observed in field-collected P. coreanum clams. In susceptibility experiments with laboratory-reared clams, individuals exposed to miracidia of E. cinetorchis did not release cercariae by 20 days after exposure; necropsy of exposed clams failed to show development of any sporocysts or rediae. To confirm the possibility of these clams serving as an experimental second intermediate host of E. cinetorchis, 20 of them were exposed to E. cinetorchis cercariae from experimentally infected Segmentina hemisphaerula that had been previously exposed to miracidia of E. cinetorchis; all exposed clams became infected. Metacercariae from clams at 14 days postinfection were fed to rats, and adult worms were recovered from the ileocecal regions. This is the first report of P. coreanum serving as second intermediate host of E. cinetorchis.
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Affiliation(s)
- Y K Park
- Department of Parasitology and Inha Research Institute for Medical Sciences, Inha University College of Medicine, Incheon
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Park GM, Yong TS. Geographical variation of the liver fluke, Clonorchis sinensis, from Korea and China based on the karyotypes, zymodeme and DNA sequences. Southeast Asian J Trop Med Public Health 2002; 32 Suppl 2:12-6. [PMID: 12041573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Genetic characterization was carried out in order to reveal the geographical variations of the oriental liver fluke, Clonorchis sinensis (Trematoda: Opisthorchiidae), collected in Korea and China. The chromosome number was 2n=56 in both Korean (Kimhae) and Chinese (Liaoning) flukes, and chromosomes were divided into two groups based on their sizes; consisting of 8 pairs of large and 20 pairs of small chromosomes. However, the karyotypes showed some differences between Korean and Chinese flukes. Isozyme analysis showed that two loci from each enzyme of aconitase and esterase (alpha-Na and beta-Na); only one locus each from six enzymes, glucose-6-phosphate dehydrogenase (G6PD), alpha-glycerophosphate dehydrogenase (GPD), 3-hydroxybutyrate dehydrogenase (HBDH), malate dehydrogenase (MDH), phosphoglucose isomerase (PGl) and phosphoglucomutase (PGM). Most of loci in two populations of C. sinensis showed homozygous monomorphic banding patterns and one of them, GPD was specific as genetic markers between two different populations. Two populations were very closely clustered within the range of genetic identity value of 0.998-1.0. We also compared patterns of intraspecific polymorphism of two markers with contrasted modes of evolution, nuclear ribosomal DNA (rDNA) and mitochondrial DNA (mtDNA) of the liver fluke from Kimhae, Guangxi and Liaoning. They showed a high homology. In conclusion, three populations of C. sinensis from Korea and China showed high homogeneity in the nucleotide sequences of the 18S rDNA, ITS2 and mtCOI gene.
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Affiliation(s)
- G M Park
- Department of Parasitology, Yonsei University, College of Medicine, Seoul, Korea
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Park GM, Lee KJ, Im KI, Park H, Yong TS. Occurrence of a diploid type and a new first intermediate host of a human lung fluke, Paragonimus westermani, in Korea. Exp Parasitol 2001; 99:206-12. [PMID: 11888247 DOI: 10.1006/expr.2001.4668] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The biology, chromosome number, and karyotype of a lung fluke, Paragonimus westermani (Kerbert, 1878) collected in Haenam, Haenam-gun Chollanam-do, Korea were analyzed. We compared the size of metacercariae from Haenam with those taken from a crayfish collected at Youngam, Youngam-gun, Chollanam-do, Korea. The mean length of P. westermani metacercariae from Haenam was 300.3 microm and that from Youngam was 362.0 microm. Adult worms were recovered from the lungs of experimentally infected dogs. The mean egg sizes obtained from adult flukes were 72.1 x 46.8 microm from Haenam and 93.5 x 54.2 microm from Youngam. Semisulcospira tegulata collected in the Youngam area were found to be infected with cercariae of P. westermani, one of the snail-borne human lung fluke trematodes in Korea. Of 4218 snails studied, 5 (0.12%) harbored P. westrermani larvae. This is the first report of S. tegulata serving as the initial intermediate host of P. westermani. The chromosome numbers of P. westermani from Haenam and Youngam were 2n = 22 and 3n = 33. The diploid type of P. westermani has not been previously reported in Korea.
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Affiliation(s)
- G M Park
- Department of Parasitology, Institute of Tropical Medicine, Seoul, 120-752, Korea
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Park GM, Lee SM, Lee IY, Ree HI, Kim KS, Hong CS, Yong TS. Localization of a major allergen, Der p 2, in the gut and faecal pellets of Dermatophagoides pteronyssinus. Clin Exp Allergy 2000; 30:1293-7. [PMID: 10971476 DOI: 10.1046/j.1365-2222.2000.00883.x] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND The house dust mite Dermatophagoides ptronyssinus is one of the most significant indoor sensitizing agents of allergy. Allergen localization may indicate the importance of secreted materials, faeces, and nonexcreted mite body components as allergen sources. OBJECTIVE This study attempted to localize the sites and concentrations of Der p 2 in the cryostat sections of D. pteronyssinus using antirecombinant Der p 2 monoclonal antibody. METHODS Male and female mites and mite faeces collected separately from both sexes were used. Live mites were embedded and serial cryostat sections for light microscopy were performed. Anti-recombinant Der p 2 monoclonal antibody previously produced by the authors was used. For immunoprobing, mite cryostat sections were incubated in the following antibody-containing solutions: monoclonal antibody against Der p 2 was initially applied to the sections and fluorescent isothiocyanate conjugated antimouse immunoglobulin G was reacted as the secondary antibody. The faecal pellets were treated the same as described above. RESULTS Immunofluorescent probing of cryostat sections with the monoclonal antibody showed labelling of the gut lining, gut contents and defecated faecal pellets. No other internal organs were identified as positively labelled. CONCLUSION This study suggested that a major allergen, Der p 2, found in the house dust mite D. pteronyssinus is derived from the digestive tract and concentrated in the faeces.
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Affiliation(s)
- G M Park
- Institute of Tropical Medicine and Institute of Allergy, Yonsei University College of Medicine, Seoul, Korea
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Abstract
Stool and cellotape anal swab examinations were carried out in August 1997 on handicapped people at an institution located in Chorwon-gun, Kangwon-do, Korea. A total of 112 stool samples (78 males and 34 females) revealed three cases of Trichuris trichiura infection and one case of Enterobius vermicularis infection. Other helminth eggs were not detected. The overall prevalence rate was 35.7% (38.5% for males and 29.4% for females). More than two different kinds of parasites were found in 42.0% of the positive stool samples (17 cases). The infection rates for protozoan cysts are as follow: Entamoeba coli (25.0%), E. histolytica (1.8%), Endolimax nana (21.4%), Iodoamoeba bütschlii (1.8%) and Giardia lamblia (0.9%). In cellotape anal swab examinations (165 samples), the prevalence rate of E. vermicularis was 20.6% (25.7% of males and 9.6% of females). In conclusion, the handicapped people in the institution showed higher infection rates of protozoan parasites and E. vermicularis, possibly due to more accessibility to the infection.
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Affiliation(s)
- J Lee
- Department of Parasitology, College of Medicine, Yonsei University Seoul, Korea
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Abstract
A karyological study was carried out in order to compared the chromosome numbers, chromosome morphologies and karyotypes of the oriental liver fluke, Clonorchis sinensis (Trematoda: Opisthorchiidae), collected from Korea and China. Chromosome preparations were made by means of air-drying method. The chromosome number was 2n = 56 in both Korean and Chinese flukes, and chromosomes were divided into two groups based on this size; consisting of 8 pairs of large and 20 pairs of small chromosomes. However, the karyotypes showed some differences between Korean and Chinese flukes. The karyotype of liver flukes from Korea consisted of three metacentric pairs, one meta-/submetacentric pair, 16 submetacentric pairs and eight subtelocentric pairs of chromosomes. On the other hand, liver flukes from China consisted of two metacentric pairs, two meta-/submetacentric pairs, 16 submetacentric pairs and eight subtelocentric pairs of chromosomes.
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Affiliation(s)
- G M Park
- Department of Parasitology, College of Medicine, Yonsei University Seoul, Korea
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Abstract
Human pulmonary dirofilariasis has been documented from many parts of the world, but not in Korea so far. We experienced a patient of pulmonary dirofilariasis who had visited a local clinic because of chest pain for 1 month. On chest radiograph, a coin lesion of 2 cm diameter and enlargement of the mediastinal lymph node were shown. An exploratory lung resection was done. Pathologically the lesion was a pulmonary dirofilariasis complicated with necrotic pneumonia, fibrosis, and infarction. At the center of the lesion, degenerated nematode sections with multilayered cuticle, thick musculature, and bilateral internal ridges on each side were found, which was identified to be Dirofilaria immitis. This is the first report of human pulmonary dirofilariasis in Korea.
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Affiliation(s)
- K J Lee
- Department of Parasitology, Yonsei University Wonju College of Medicine, Wonju, Kangwon, Korea.
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Park GM, Yong TS, Im K, Lee KJ. Isozyme electrophoresis patterns of the liver fluke, Clonorchis sinensis from Kimhae, Korea and from Shenyang, China. Korean J Parasitol 2000; 38:45-8. [PMID: 10743360 PMCID: PMC2721108 DOI: 10.3347/kjp.2000.38.1.45] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
An enzyme analysis of the liver fluke, Clonorchis sinensis from Kimhae, Korea and from Shenyang, China was conducted using a horizontal starch gel electrophoresis in order to elucidate their genetic relationships. A total of eight enzymes was employed from two different kinds of buffer systems. Two loci from each enzyme of aconitase and esterase (alpha-Na and beta-Na); and only one locus each from six enzymes, glucose-6-phosphate dehydrogenase (G6PD), alpha-glycerophosphate dehydrogenase (GPD), 3-hydroxybutyrate dehydrogenase (HBDH), malate dehydrogenase (MDH), phosphoglucose isomerase (PGI), and phosphoglucomutase (PGM) were detected. Most of loci in two populations of C. sinensis showed homozygous monomorphic banding patterns and one of them, GPD was specific as genetic markers between two different populations. However, esterase (alpha-Na), GPD, HBDH and PGI loci showed polymorphic banding patterns. Two populations of C. sinensis were more closely clustered within the range of genetic identity value of 0.998-1.0. In summarizing the above results, two populations of C. sinensis employed in this study showed mostly monomorphic enzyme protein banding patterns, and genetic differences specific between two populations.
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Affiliation(s)
- G M Park
- Department of Parasitology, Yonsei University College of Medicine, Seoul, Korea
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Lee SU, Huh S, Park GM, Chai JY. A cytogenetic study on human intestinal trematodes of the genus Metagonimus (Digenea: Heterophyidae) in Korea. Korean J Parasitol 1999; 37:237-41. [PMID: 10634039 PMCID: PMC2733200 DOI: 10.3347/kjp.1999.37.4.237] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In order to analyze chromosome numbers and karyotypes of intestinal trematodes belonging to the genus, Metagonimus, the gonad tissues of M. takahashii, M. miyatai, and M. yokogawai were prepared and examined. The number of bivalents in the first meiotic division of M. takahashii was nine (n = 9). The diploid number of M. miyatai was observed to be eighteen (2n = 18) and their chromosomes consisted of one pair of metacentric, 7 pairs of submetacentric, and one pair of telocentric chromosomes. The diploid number of M. yokogawai was thirty-two (2n = 32) and the chromosome complements were composed of two pairs of metacentric, 11 pairs of submetacentric, and three pairs of subtelocentric chromosomes. These results could be a supporting evidence for the validity of the new species, M. miyatai, distinct from M. yokogawai.
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Affiliation(s)
- S U Lee
- Department of Parasitology, College of Mediicine, Hallym University, Chunchon, Korea
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Yong TS, Lee JS, Lee IY, Park SJ, Park GM, Ree HI, Park JW, Hong CS, Park HS. Identification of Chironomus kiiensis allergens, a dominant species of non-biting midges in Korea. Korean J Parasitol 1999; 37:171-9. [PMID: 10507225 PMCID: PMC2733147 DOI: 10.3347/kjp.1999.37.3.171] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Non-biting midges are known to contain potent inhalant allergens. IgE antibody responses to the crude extract of Chironomus kiiensis adults, a dominant chironomid species in Korea, were examined. With the IgE-ELISA or passive cutaneous anaphylaxis reactions, increased levels of chironomid-specific IgE were detected in the skin test positive human sera, or immunized BALB/c mouse sera with the crude extract adsorbed to alum. IgE-immunoblot analysis showed major IgE-reacting protein band patterns, which reacted with more than 50% of the skin test positive human sera, at 110, 80, 73, 46, 40, 37, 34, and 31 kDa. The reactive band patterns were largely similar between skin test positive humans and immune BALB/c mice. However, the bands of 55, 31, 27, 26, 24, and 23 kDa were found only in sensitized humans, but not in immunized mice.
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Affiliation(s)
- T S Yong
- Department of Parasitology, Yonsei University College of Medicine, Seoul, Korea.
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Yong TS, Lee SM, Park GM, Lee IY, Ree HI, Kim KS, Oh SH, Park JW, Hong CS. Monoclonal antibodies to recombinant Der p 2, a major house dust mite allergen: specificity, epitope analysis and development of two-site capture ELISA. Korean J Parasitol 1999; 37:163-9. [PMID: 10507224 PMCID: PMC2733146 DOI: 10.3347/kjp.1999.37.3.163] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
House dust mite allergens have been well established as sensitizing agents that are important in the induction of allergic diseases. In order to analyze epitopes of the allergen and to develop a quantitative method of the allergen exposure, monoclonal antibodies against a recombinant Der p 2 (rDer p 2), one of the major allergens of Dermatophagoides pteronyssinus, were produced. Four monoclonal antibodies produced were species-specific and did not cross-react to the D. farinae crude extract. Two of the monoclonal antibodies were found to be IgG1 and the others were IgM. For the analysis of epitopes, a Der p 2 cDNA encoding 126 amino acids (aa) was dissected into three fragments with several overlapping peptides. A (aa residues 1-49), B (44-93), and C fragment (84-126). Three monoclonal antibodies showed reactivities to the recombinant B fragment and to the full-length rDer p 2, but one monoclonal antibody reacted only with the full-length rDer p 2. Two-site capture ELISA was developed using two different monoclonal antibodies for quantitating Der p 2 in house dust. The sensitivity limit was 4 ng/ml with rDer p 2 and 8 micrograms/ml with the D. pteronyssinus crude extract. The result suggested that the assay using monoclonal antibodies against rDer p 2 could be useful for the environmental studies and for the standardization of mite allergen extracts.
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Affiliation(s)
- T S Yong
- Department of Parasitology, Yonsei University College of Medicine, Seoul, Korea.
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Park GM, Kim JJ, Chung PR, Wang Y, Min DY. Karyotypes on three species of Chinese mesogastropod snails, Semisulcospira libertina, S. dolichostoma and Viviparus rivularis. Korean J Parasitol 1999; 37:5-11. [PMID: 10188377 PMCID: PMC2733912 DOI: 10.3347/kjp.1999.37.1.5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Three species of the families Viviparidae and Pleuroceridae, the first intermediate host of paragonimiasis, metagonimiasis and echinostomiasis were studied cytologically. The observed diploid chromosome number was as follows: Semisulcospira libertina 36, S. dolichostoma 34, and Viviparus rivularis 64. The mitotic chromosome complement of S. libertina has nine metacentric pairs and nine submetacentric pairs, and S. dolichostoma has three metacentric pairs and 14 submetacentric pairs of chromosomes. Viviparus rivularis showed two metacentric pairs and 30 submetacentric pairs of chromosomes.
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Affiliation(s)
- G M Park
- Department of Parasitology, Yonsei University College of Medicine, Seoul, Korea
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Abstract
A karyotype analysis of the chromosome of Neodiplostomum seoulense, one of causative agents of human intestinal trematodiasis, was done from the gonad tissue by the squashing method. The chromosome number was n = 10 and 2n = 20. Chromosome length was 1.30-4.0 microns. Chromosome pairs in the complement consisted of two pairs of metacentric, five pairs of submetacentrics/subtelocentric and three pairs of telocentric chromosomes. These data were comparable with those of other intestinal trematodes.
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Affiliation(s)
- G M Park
- Department of Biology, Kangwon National University, Chunchor, Korea
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Park GM. [Endodontic techniques of wide opened root apex (author's transl)]. Taehan Chikkwa Uisa Hyophoe Chi 1976; 14:96. [PMID: 1072254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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