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Anatomic and technical skill factor of gastroduodenal complication in post-transarterial embolization for hepatocellular carcinoma: A retrospective study of 280 cases

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World Journal of Gastroenterology 2005年第10期11卷 1554-1557页

作者： ting-kai leung Chi-Ming Lee Hsin-Chi Chen Department of Diagnostic Radiology

AIM: To reduce the possibility of gastroduodenal complications. The purpose of this retrospective study was to survey the literature and compare and discuss the incidence of post-transarterial embolization (TAE)gastroduodenal ***: We found reports describing 280 cases of hepatocellular carcinoma with TAE procedures done during the past 4 years and selected all of them for our *** these cases, 86 were suspected of suffering gastroduodenal complications within one month of postTAE treatment. Fifteen of these cases were proved by pan-endoscopy to have gastroduodenal erosions or ulcerations. We reviewed the angiographic pictures in patient records to evaluate the possibility that anatomic and technical skill factors could explain the ***: Amongst the 15 cases, 9 were primary lesions of the antrum and prepylorus; 4 had duodenal ulcer or erosions; 2 had mid-body lesions; none showed a lesion at the fundus or cardia region. Three cases had not received TAEs using our ideal method, and may be associated with possible regurgitation of gel-foam pieces into the right or left gastric arteries. Two cases involved sub-selective embolization at a distal point on the hepatic artery; one case was found by angiography to have complete occlusion of the celiac ***: Comparing our results with past cases of post-TAE gastroduodenal complications, we surmise that our relatively low incidence (5.3%) of gastric complications might be explained by our concerted efforts to improve our technical skills in multi-sequential, selective and superselective approaches to the embolization of tumor vessels.

关键词： Post-TAE complication Transarterial embolization Gastroduodenal complication

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Fatal thrombotic complications of hepatic cystic compression of the inferior vena: A case report

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World Journal of Gastroenterology 2005年第11期11卷 1728-1729页

作者： ting-kai leung Chi-Ming Lee Hsin-Chi Chen Department of Diagnostic Radiology

Of 5% of patients who develop liver cysts, only 10-15%of them come for medical attention, typically because of dull right upper quadrant pain, abdominal bloating or early satiety. We treated a 77-year-old female with a rare complication of inferior vena cava thrombosis. The patient expired due to septic shock and multiple organ failure.

关键词： Liver cyst Inferior vena cava thrombosis Non-parasitic cyst Cellulitis IVC compression Sepsis

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Difficulty with diagnosis of malignant pancreatic neoplasms coexisting with chronic pancreatitis

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World Journal of Gastroenterology 2005年第32期11卷 5075-5078页

作者： ting-kai leung Chi-Ming Lee Fong-Chieh Wang Hsin-Chi Chen Hung-Jung Wang Department of Diagnostic RadiologyTaipei Medical University Hospital Taiwan Department of Internal Medicine Taipei Medical University HospitalTaiwanChina

Chronic pancreatitis is a relatively common disease. We encountered two different cases of belatedly demonstrated pancreatic carcinoma featuring underlying chronic pancreatitis. The first case was one that was highly suspected as that of a malignancy based upon imaging study, but unfortunately, it could not be confirmed by intra-operative cytology at that time. Following this, the surgeon elected to perform only conservative bypass surgery for obstructive biliary complication. Peritoneal carcinomatosis was later noted and the patient finally died. The second case, a malignant mucinous neoplasm,was falsely diagnosed as a pseudocyst, based upon the lesion's sonographic appearance and associated elevated serum amylase levels. After suffering repeated hemoptysis,the patient was found to exhibit lung metastasis and peritoneal seeding. We reviewed some of the literature,including those studies discussing chronic pancreatitis predisposing to a malignant change. These two case analyses illustrate clearly that the diagnosis for such conditions, which is simply based upon imagery or pathological considerations may end up being one of a mistaken malignancy. Some of our suggestions for the treatment of such malignancies as revealed herein include,total pancreatomy for univocal mass lesion, and needle aspiration of lesion-contained tissue for amylase, CA199and CEA levels for a suspicious cystic pancreatic mass.

关键词： Mucinous cystic neoplasm Pancreatic carcinoma Pseudocyst Pancreatic adenocarcinoma Chronic pancreatitis

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Image features of two rare mediastinal tumors: schwannoma of intrathoracic phrenic nerve and clear cell chondrosarcoma of the rib

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Chinese Medical Journal 2005年第17期118卷 1493-1496页

作者： ting-kai leung Chien-Jui Cheng Chi-Ming Lee Li-Kuo Shen Hung-Jung Wang Ya-Yen Chen Diagnostic Radiology Department of Taipei Medical University Hospital Taipei Medical University Taipei China Pathology Department of Taipei Medical University Hospital Taipei Medical University Taipei China

The current report focuses on two patients of the same age who presented similar appearances on initial anteroposterior chest images. Follow-up images showed superoanterior and superoposterior mediastinal lesions. The first patient with noninvasive cystic thymoma was suspected before surgery, while the pathologic diagnosis was intrathoracic phrenic nerve schwannoma. The second patient was with an asymmetric, dumbbell-shaped paravertebral tumor over T3 and T4 on the left side. The preoperative diagnostic images were interpreted as showing a neurogenic tumor. However, the pathologic report was cell chondrosarcoma.

关键词： mediastinal tumors schwannoma phrenic nerve clear cell chondrosarcoma

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Balthazar computed tomography severity index is superior to Ranson criteria and APACHE Ⅱ scoring system in predicting acute pancreatitis outcome

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World Journal of Gastroenterology 2005年第38期11卷 6049-6052页

作者： ting-kai leung Chi-Ming Lee Shyr-Yi Lin Hsin-Chi Chen Hung-Jung Wang Li-Kuo Shen Ya-Yen Chen Department of Diagnostic Radiology Taipei Medical University Hospital Taipei TaiwanChina Department of Internal Medicine Taipei Medical University Hospital Taipei Taiwan China

AIM： Acute pancreatitis （AP） is a process with variable involvement of regional tissues or organ systems. Multifactorial scales included the Ranson, Acute Physiology and Chronic Health Evaluation （APACHE Ⅱ） systems and Balthazar computed tomography severity index （CTSI）. The purpose of this review study was to assess the accuracy of CTSI, Ranson score, and APACHE II score in course and outcome prediction of AP. METHODS： We reviewed 121 patients who underwent helical CT within 48 h after onset of symptoms of a first episode of AP between 1999 and 2003. Fourteen inappropriate subjects were excluded; we reviewed the 107 contrastenhanced CT images to calculate the CTSI. We also reviewed their Ranson and APACHE Ⅱ score. In addition, complications, duration of hospitalization, mortality rate, and other pathology history also were our comparison parameters. RESULTS： We classified 85 patients （79%） as having mild AP （CTSI 〈5） and 22 patients （21%） as having severe AP （CTSI ≥5）. In mild group, the mean APACHE II score and Ranson score was 8.6±1.9 and 2.4±1.2, and those of severe group was 10.2±2.1 and 3.1±0.8, respectively. The most common complication was pseudocyst and abscess and it presented in 21 （20%） patients and their CTSI was 5.9±1.4. A CTSI ≥5 significantly correlated with death, complication present, and prolonged length of stay. Patients with a CTSI ≥5 were 15 times to die than those CTSI 〈5, and the prolonged length of stay and complications present were 17 times and 8 times than that in CTSI 〈5, respectively. CONCLUSION： CTSI is a useful tool in assessing the severity and outcome of AP and the CTSI ≥5 is an index in our study. Although Ranson score and APACHE II score also are choices to be the predictors for complications, mortality and the length of stay of AP, the sensitivity of them are lower than CTSI.

关键词： Acute pancreatitis Ranson score APACHE Ⅱ score Balthazar computed tomography severity index

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Evaluation of the effect of partial splenic embolization on platelet values for liver cirrhosis patients with thrombocytopenia

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World Journal of Gastroenterology 2007年第4期13卷 619-622页

作者： Chi-Ming Lee ting-kai leung Hung-Jung Wang Wei-Hsing Lee Li-Kuo Shen Jean-Dean Liu Chun-Chao Chang Ya-Yen Chen Department of Diagnostic Radiology Taipei Medical University Hospital Taipei Taiwan China Department of Medicine Taipei Medical University Taipei Taiwan China Department of Internal Medicine Taipei Medical University Hospital Taipei Taiwan China

AIM： TO investigate the effect of partial splenic embolization （PSE） on platelet values in liver cirrhosis patients with thrombocytopenia and to determine the effective embolization area for platelet values improvement.METHODS： Blood parameters and liver function indicators were measured on 10 liver cirrhosis patients （6 in Child-Pugh grade A and 4 in grade B） with thrombocytopenia （platelet values 〈 80 × 10^3/μL） before embolization. Computed tomography scan was also needed in advance to acquire the splenic baseline. After 2 to 3 d, angiography and splenic embolization were performed. A second computed tomography scan was made to confirm the embolization area after 2 to 3 wk of embolization. The blood parameters of patients were also examined biweekly during the 1 year follow-up period. RESULTS： According to the computed tomography images after partial splenic embolization, we divided all paUents into two groups： low （〈 30%）, and high （≥ 30%） embolization area groups. The platelet values were increased by 3 times compared to baseline levels after 2 wk of embolization in high embolization area group. In addition, there were significant differences in platelet values between low and high embolization area groups. GPT values decreased significantly in all patients after 2 wk of embolization. The improvement in platelet and GPT values still persisted until 1 year after PSE. In addition, 3 of 4 （75%） Child-Pugh grade B patients progressed to grade A after 2 mo of PSE. The complication rate in 〈 30% and ≥30% embolization area groups was 50% and 100%, respectively. CONCLUSION： Partial splenic embolization is an effective method to improve platelet values and GPT values in liver cirrhosis patients with thrombocytopenia and the ≥ 30% embolization area is meaningful for platelet values improvement. The relationship between the complication rate and embolization area needs further studies.

关键词： Partial splenic embolization Liver cirrhosis Thrombocytopenia

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Image features of two rare mediastinal tumors: schwannoma of intrathoracic phrenic nerve and clear cell chondrosarcoma of the rib

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中华医学杂志(英文版) 2005年第17期 87-90页

作者： ting-kai leung,Chien-Jui Cheng,Chi-Ming Lee,Hung-Jung Wang,Ya-Yen Chen Diagnostic Radiology Department of Taipei Medical University Hospital Taipei Medical University Taipei China Pathology Department of Taipei Medical University Hospital TaipeiMedical University Taipei China Diagnostic Radiology Department of Taipei Medical University Hospital Taipei Medical University Taipei China Diagnostic Radiology Department of Taipei Medical University Hospital Taipei Medical University Taipei China Diagnostic Radiology Department of Taipei Medical University Hospital Taipei Medical University Taipei China

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Retrospective study of MRI images to examine the effects of estrogen supplementation on breast tissue: A pilot study in Asian Taiwan

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Health 2013年第7期5卷 105-109页

作者： ting-kai leung Pai-Jung Huang Chih-Hsiung Wu Chi-Ming Lee Chin-Sheng Hung Hung-Hua Liang Jeng-Fong Chiou Breast Health Center Taipei Medical University Hospital Taipei City Chinese Taipei Department of Diagnostic Radiology Taipei Medical University Hospital Taipei City Chinese Taipei Department of Diagnostic Radiology Taipei Medical University Hospital Taipei City Chinese Taipei Faculty of Medicine Taipei Medical University Taipei City Chinese Taipei

MRI provides a highly sensitive technique for early detection of abnormal breast tissue. It is useful for identifying a status of proliferation, angiogenesis, and microvascular permeability, which may indicate early breast neoplasm formation. We retrospectively studied 2005 breast MRI images from Taiwan Residents women and classified them as either healthy or unhealthy according to BI-RADS categories. A subgroup of our study patients had received estrogen supplements, containing estrogen components or phytoestrogen, for at least 3 months. These patients’ images were also classified into the healthy and unhealthy groups. These two groups were compared and a significant difference was found between them (P < 0.002). Comparison of the MRI images also identified certain cases that demonstrated a typical estrogen/phytoestrogen effect or a withdrawal effect. The overuse of estrogen or phytoestrogen supplements can increase breast glandular tissue proliferation, as reflected on MRI images. Such proliferation may increase the patient’s risk of future breast cancer.

关键词： Breast MRI Estrogen Hormone Effect Phytoestrogen Proliferative Breast Glandular Tissue

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A Simple Embedding Method for the Laplace-Beltrami Eigenvalue Problem onImplicit Surfaces

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Communications on Applied Mathematics and Computation 2024年第2期6卷 1189-1216页

作者： Young Kyu Lee Shingyu leung Department of Mathematics The Hong Kong University of Science and TechnologyClear Water BayHong KongChina

We propose a simple embedding method for computing the eigenvalues and eigenfunctions of the Laplace-Beltrami operator on implicit *** approach follows an embedding approach for solving the surface eikonal *** replace the differential operator on the interface with a typical Cartesian differential operator in the surface *** proposed algorithm is easy to implement and *** will give some two-and three-dimensional numerical examples to demonstrate the effectiveness of our proposed approach.

关键词： Laplace-Beltrami operator Level set method Implicit representation Eigenvalues Numerical PDEs

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Changes of tropical cyclone size in three oceanic basins of the northern hemisphere from 2001 to 2021

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Frontiers of Earth Science 2024年第2期18卷 312-323页

作者： Banglin ZHANG Jeremy Cheuk-Hin leung Shengyuan LIU Jianjun XU Guangzhou Institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction CMAGuangzhou 510640China College of Atmospheric Science Lanzhou UniversityLanzhou 730020China College of Ocean and Meteorology Guangdong Ocean UniversityZhanjiang 524088China CMA-GDOU Joint Laboratory for Marine Meteorology&South China Sea Institute of Marine Meteorology Guangdong Ocean UniversityZhanjiang 524088China

In this study the changes of tropical cyclone(TC)size from 2001 to 2021 are analyzed based on linear and quadratic curve fittings of the National Hurricane Center(NHC)/Joint Typhoon Warning Center(JTWC)best track data,based on the radius of maximum wind(RMW)and the average radius of 34-kt wind(AR34),in three oceanic basins of the North Atlantic(NATL),the Western North Pacific(WPAC)and the Eastern North Pacific(EPAC).The computations are done separately for two categories of tropical cyclones:tropical storms(TS)and hurricanes(HT).Size changes of landfalling and non-landfalling TCs are also *** show that there is a great inter-basin variability among the changes in TC *** conclusions include:1)overall,the inner cores of TSs have become larger in all three basins,with the increasing tendencies being significant in the NATL and WAPC,while those of HTs mostly get smaller or remain similar;2)meanwhile,comparatively large inter-basin differences are observed for the TC outer core sizes,and the sizes of landfalling TCs;3)particularly,a significant decrease in landfalling HT outer core size is observed over the EPAC;4)in contrast,significant increases in landfalling TS inner core size are found over the NATL and *** presented analysis results could benefit future research about TC forecasts,storm surge studies,and the cyclone climate and its changes.

关键词： tropical cyclone storm size frequency intensity duration

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