Y M Tsang

Taipei Medical University, Taipei, Taipei, Taiwan

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Publications (40)139.58 Total impact

  • Article: Management of lower gastrointestinal bleeding with haemodynamic instability.
    K-L Liu, C-W Lee, W-J Lee, Y-M Tsang, B-R Lin
    Gut 08/2008; 57(8):1055, 1081. · 10.11 Impact Factor
  • Article: Unusual angiographic findings of lower gastrointestinal bleeding.
    Gut 08/2008; 57(7):974, 1022. · 10.11 Impact Factor
  • Article: Double lumen duodenum in a patient with melaena.
    K-L Liu, Y-M Tsang, J-T Lin, H-P Wang
    Gut 04/2008; 57(3):343, 364. · 10.11 Impact Factor
  • Article: Case report: pericecal hernia: a report of two cases and survey of the literature.
    H-C Lu, J Wang, Y-M Tsang, H-S Tseng, Y-W Li
    Clinical Radiology 10/2002; 57(9):855-8. · 1.95 Impact Factor
  • Source
    Article: Diabetic ketoacidosis and hypogonadotropic hypogonadism in association with transfusional hemochromatosis in a man with beta-thalassemia major.
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    ABSTRACT: We report a 23-year-old man with beta-thalassemia major and transfusional hemochromatosis, which manifested as diabetic ketoacidosis and hypogonadotropic hypogonadism. This unusual presentation of diabetic ketoacidosis in hemochromatosis has rarely been reported. Magnetic resonance imaging of the abdomen showed decreased signal intensity in the liver, spleen, and pancreas. In addition, the pituitary gland also showed heterogeneous low signal intensity, compatible with hemochromatosis. He was treated with insulin supplements and pulsatile human chorionic gonadotropin administration. Clinical improvement was noted after hormone replacement. Intensive iron chelation therapy was given to prevent cardiac complications, and to restore his gonadal function. During follow-up, the patient experienced improvement in libido and sexual potency.
    Journal of the Formosan Medical Association 08/2001; 100(7):492-6. · 1.13 Impact Factor
  • Article: Sequential Doppler sonographic studies of embolization in a patient with hepatic involvement in hereditary hemorrhagic telangiectasia: correlation with angiographic findings.
    J H Lin, P M Yang, Y M Tsang, F J Hsieh
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    ABSTRACT: A 41-year-old man was admitted for symptoms of progressive congestive heart failure. His family history and the results of a physical examination were highly suggestive of Osler-Weber-Rendu disease (hereditary hemorrhagic telangiectasia, HHT). Cardiac catheterization and hepatic angiography demonstrated HHT with left-to-right shunting from the liver. The patient underwent transcatheter arterial embolization (TAE) of the right hepatic artery. We performed both Doppler sonography and angiography before and after TAE. The treatment improved the clinical manifestations of congestive heart failure, including the edema of the leg and dyspnea. Doppler sonographic studies also showed an increased resistive index in the right hepatic artery and decreased flow volumes and velocities in the right and middle hepatic veins, respectively, after treatment. Corresponding changes on angiography after TAE showed decreased right hepatic arterial flow and nonopacified branches distal to the coils, disappearance of the mottled hepatogram in the right lobe, reduction of contrast agent staining, and enhanced calibers in the right and middle hepatic veins. This case illustrates that qualitative and quantitative studies with duplex and color Doppler ultrasound can be used to detect or define the extent of hepatic involvement in HHT patients before TAE, monitor hemodynamic changes of the intrahepatic vasculature after TAE, evaluate the efficacy of treatment, and possibly obviate the need for repeated angiography for diagnosis only.
    Journal of the Formosan Medical Association 10/1999; 98(9):633-8. · 1.13 Impact Factor
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    Article: Bacterial infections associated with hepatic arteriography and transarterial embolization for hepatocellular carcinoma: a prospective study.
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    ABSTRACT: Sepsis and liver abscess are serious complications following transarterial embolization (TAE) for hepatocellular carcinoma (HCC). However, the exact incidence and the necessity of antibiotic prophylaxis remain undetermined. Between November 1996 and November 1997, we prospectively studied bacterial infections in 231 HCC patients who underwent 287 angiographic procedures without antibiotic prophylaxis, including 176 TAEs and 111 hepatic arteriographies (HAs). Four of the 111 HAs were complicated by transient asymptomatic bacteremia. Of the 176 TAEs, 2 were associated with asymptomatic bacteremia, and 7 (4%) were associated with symptomatic bacterial infection, including 3 cases of sepsis, 2 of liver abscess, and 2 of infected biloma. For patients with HCC, TAE was associated with a higher risk of developing symptomatic bacterial infections than was HA (4% vs. 0, respectively; P = .03). Previous gastrectomy was the only possible risk factor for liver abscess. Finally, early diagnosis and treatment of these infectious complications usually result in successful outcome.
    Clinical Infectious Diseases 08/1999; 29(1):161-6. · 9.15 Impact Factor
  • Article: High-resolution computed tomography of pulmonary alveolar microlithiasis.
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    ABSTRACT: Pulmonary alveolar microlithiasis (PAM) is a rare disease. It has been reported predominantly in Turkey. We report a case of PAM with characteristic high-resolution computed tomography (CT) findings. A 45-year-old Taiwanese woman had progressive difficulty in breathing for 7 years. Her chest radiographs showed diffuse high-density micronodules and reticular lines that obliterated the bronchovascular bundles and the margin of the heart and diaphragm. The micronodules were scattered throughout both lung fields with basal predominance. Examination of a transbronchial lung biopsy specimen showed PAM. High-resolution CT showed a unique and characteristic calcified reticular pattern and thickening of the interlobular septa of the lung parenchyma, with predominant basal and peripheral lung distribution. Reticulonodular changes of the interlobular septa and intralobular interstitial lines associated with subpleural air cysts and paraseptal emphysema were evident. These high-resolution CT findings are pathognomonic for PAM. Thus, lung biopsy may be avoided in the presence of this characteristic finding.
    Journal of the Formosan Medical Association 07/1999; 98(6):440-3. · 1.13 Impact Factor
  • Article: Extrauterine pelvic arteriovenous malformation mimicking the clinical presentation of structural heart disease.
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    ABSTRACT: A case is reported of an extrauterine pelvic arteriovenous malformation involving branches of the internal iliac arteries. Cardiomegaly and a rough cardiac murmur were the clinical presentations mimicking a structural heart disease. A continuous bruit could only be detected by the diaphragm of the stethoscope applied firmly to the left lower abdomen. Multiple blood samplings from inferior vena cava, and iliac and femoral veins for determination of oxygen saturation may be necessary for suspected cases. However, selective arteriography remains the best method for diagnosing the presence, extent, and multiplicity of the lesions before surgery or percutaneous arterial embolization.
    International Journal of Cardiology 07/1999; 69(3):305-8. · 7.08 Impact Factor
  • Article: Radiographic and computed tomographic findings of gastric mucosa-associated lymphoid tissue lymphomas.
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    ABSTRACT: The purpose of this retrospective study was to evaluate the detection of gastric mucosa-associated lymphoid tissue (MALT) lymphoma lesions by upper gastrointestinal (UGI) radiography and computed tomography (CT). Fifteen patients with endoscopic biopsy-proven MALT lymphoma were included. Fourteen of these patients underwent double-contrast UGI radiography and 14 were examined with CT of the upper abdomen; 13 underwent both procedures. UGI radiography identified 88% (30/34) of lesions detected by endoscopy, including 12 of 13 enlarged rugal folds and 15 of the 17 multinodular lesions, but failed to identify two of the three ulcerative lesions. UGI radiography identified the only submucosal lesion demonstrated by endoscopy, as well as one at the gastric antrum that had been missed by endoscopy. CT demonstrated nine of 30 endoscopically proven MALT lymphoma lesions, three with focal thickening of the gastric wall and six with a lobulated inner gastric wall. CT failed to demonstrate two fundal and 19 antral or gastric body lesions. Our findings suggest that the predominant UGI features of gastric MALT lymphoma are enlarged folds and multinodular lesions. Although UGI radiography does not reveal all MALT lymphoma lesions, it may find lesions that are not detected by endoscopy. Mucosal lesions of gastric MALT lymphoma are usually not detected by CT.
    Journal of the Formosan Medical Association 05/1998; 97(4):261-5. · 1.13 Impact Factor
  • Article: Efficacy of a stress management program for patients with hepatocellular carcinoma receiving transcatheter arterial embolization.
    M L Lin, Y M Tsang, S L Hwang
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    ABSTRACT: Transcatheter arterial embolization (TAE), a common treatment for patients with unresectable hepatocellular carcinoma (HCC), can provoke severe physical discomfort and psychologic stress. The purpose of this study was to investigate the effect of a combination of health education, muscle relaxation, and back massage on reducing physical and psychologic stress in HCC patients receiving TAE. A quasi-experimental design was used. Forty patients with HCC (30 men and 10 women) with a mean age of 57 +/- 12 years were recruited and randomly assigned to the control or experimental group. The effectiveness of the stress management program was evaluated using a knowledge questionnaire, a worry inventory, a state-trait anxiety inventory, and a physical distress scale. After completing the stress management program, the experimental group had a greater mean increase in knowledge score than the control group (5.1 vs 0.8, p < 0.0001) and a greater mean decrease in worry score (-8.2 vs 1.1, p < 0.0001). The mean decrease in the anxiety score in the experimental group was also significantly greater than in the control group before TAE (-5.8 vs 3.2, p < 0.001) and 2, 4, 6, and 7 days after TAE (-8.2 vs 7.1, p < 0.001; -8.7 vs 3.2, p < 0.001; -9.8 vs -2.1, p < 0.05; -11 vs -0.9, p < 0.05). The patients in the experimental group had a smaller mean increase in physical distress score than the control group at 2, 4, 6, and 7 days after TAE (34.7 vs 50.2, 20.9 vs 29.6, 10.6 vs 18.2, 3.9 vs 11.2, all p < 0.05). This stress management program effectively reduces the stress of HCC patients undergoing TAE.
    Journal of the Formosan Medical Association 02/1998; 97(2):113-7. · 1.13 Impact Factor
  • Article: Detection of hepatic neoplasms by computed tomographic arterial portography in cirrhotic patients.
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    ABSTRACT: Computed tomography (CT) during arterial portography (CTAP) is useful in detecting hepatic tumors but cirrhotic change may interfere with portal flow and the prediction of resectability. We evaluated the usefulness of CTAP in detecting hepatic tumors, especially hepatocellular carcinoma (HCC), in patients with or without cirrhotic change. Ninety-six patients with pathologically proven hepatic tumors were assessed, of whom 90 had hepatocellular carcinoma. The tumors had been previously detected by abdominal ultrasound and CT scans, after which the patients were referred for angiography and CTAP. The CTAP findings were compared with ultrasonographic, conventional CT, angiographic, and subsequent surgical and pathologic findings regarding size, number, and location of the hepatic lesions. CTAP detected 134 of 143 pathologically proven lesions. The overall sensitivity of CTAP in the 96 patients was 94%, with a false-positive rate of 22%. The detection rate of CTAP for tumors less than 2 cm in diameter was high (92%). The sensitivity and false-positive rate for CTAP in 60 cirrhotic patients were 94% and 23%, respectively, CTAP is a sensitive imaging modality for detection of hepatic neoplasms even in patients with cirrhosis, but its false-positive rate is high.
    Journal of the Formosan Medical Association 01/1998; 96(12):955-61. · 1.13 Impact Factor
  • Article: Bile duct hamartomas. A report of two cases.
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    ABSTRACT: Bile duct hamartomas (von Meyenburg's complexes) of the liver are usually detected at laparotomy or autopsy as an incidental finding, and usually they are multiple. We report two cases of proved bile duct hamartomas of the liver. The first was in a 65-year-old man whose initial sepsis and many hepatic lesions were interpreted as microabscess of the liver. The second patient was a 39-year-old man, a hepatitis B surface antigen carrier, in whom an incidental hepatic tumor was found. We suggest that liver biopsy be done in hepatic lesions with uncertain clinical features, because the histologic findings may change the treatment plan.
    Journal of Clinical Gastroenterology 01/1998; 25(4):608-11. · 3.16 Impact Factor
  • Article: Clinical and microbiological features of liver abscess after transarterial embolization for hepatocellular carcinoma.
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    ABSTRACT: To present the clinical and microbiological features of liver abscess after transarterial embolization (TAE) for hepatocellular carcinoma (HCC). We retrospectively reviewed records of 452 TAE procedures in 289 patients with HCC over a 2-yr period. Four men and one woman with a mean age of 68.4 yr were diagnosed with liver abscess 1-8 wk (mean 4.6 wk) after the embolization. The incidence was 1.1% (5/452). Common symptoms included fever, chills, and right upper quadrant pain. Serum aminotransferase, alkaline phosphatase, and gamma-glutamyltransferase levels and leukocyte count were frequently elevated. All the abscesses appeared as areas of hypodensity on CT scan and hypoechogenicity on ultrasonogram. The areas contained gas in the embolized tumor, which led to the suspicion and finally the diagnosis of abscess. In contrast to predominance of gram-negative aerobes in sporadic pyogenic liver abscesses, the causative microorganism was predominantly gram positive (60%). All patients were treated with parenteral antibiotics plus percutaneous aspiration, drainage, or operation, but one patient died from the abscess. For patients receiving TAE for HCC, few specific clinical or radiological features could readily differentiate patients complicated with liver abscess from those without. This may delay a timely diagnosis and lead to significant morbidity. Hence, in patients with risk factors, including old age, previous biliary tract disease, large tumor size (>5 cm), and gas forming in the embolized tumor, aspiration of the suspected focal hepatic lesion should be performed as soon as possible.
    The American Journal of Gastroenterology 12/1997; 92(12):2257-9. · 7.28 Impact Factor
  • Article: Focal myositis of esophagus: a distinct inflammatory pseudotumor mimicking esophageal malignancy.
    I P Chiang, J Wang, Y M Tsang, C H Hsiao
    The American Journal of Gastroenterology 02/1997; 92(1):174-5. · 7.28 Impact Factor
  • Source
    Article: Transcatheter embolization in treatment of congenital coronary artery aneurysm.
    American Heart Journal 03/1996; 131(2):396-7. · 4.65 Impact Factor
  • Article: Variceal bleeding due to segmental portal hypertension caused by chronic pancreatitis.
    American Journal of Emergency Medicine 12/1995; 13(6):676-7. · 1.98 Impact Factor
  • Source
    Article: Clinical management of recurrent hepatocellular carcinoma.
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    ABSTRACT: The aim of this study was to evaluate the long-term benefits of the aggressive treatments with resection or transarterial chemoembolization (TACE) for recurrent hepatocellular carcinoma (HCC). Primary HCC is one of the most fatal malignancies in Taiwan. The result of resection for HCC remains unsatisfactory, primarily due to the high recurrence rate. To improve surgical results, recurrent HCC must be treated with aggressive resection or TACE. The authors evaluated the results of repeated hepatic resection among 25 patients with recurrent HCC and of TACE among 12 patients with resectable recurrent HCC. The outcomes of an additional 64 patients with unresectable recurrent HCC were also evaluated. During the follow-up period from 2-112 months, 52% (13/25) of patients receiving repeat resection (group 1) were alive, whereas 42% (5/12) of patients receiving TACE (group 2) were alive. No perioperative deaths within 30 days after surgery occurred in the repeated resection group. The cumulative survival rates at 1, 2, 3, and 5 years after the first operation were 92%, 84%, 71.6%, and 65.1% in group 1 and 83.3%, 75%, 75%, and 22.5% in group 2. The survival rates at 6 months and at 1, 2, and 3 years after recurrence were 92%, 72%, 64%, and 44.8% in group 1 and 83.3%, 75%, 66.7%, and 48% in group 2. The survival of patients with unresectable recurrent HCC was much worse: 1-, 2-, 3-, and 5-year survival after surgery was 57.8%, 29.8%, 15.5%, and 0%; and 6-month and 1-, 2-, and 3-year survival after recurrence was 46.5%, 29.2%, 12.5% and 7.8%. More aggressive treatment with repeated hepatic resection can prolong survival time after recurrence of HCC in selected patients. However, TACE can also achieve good results although it is not thought of as curative.
    Annals of Surgery 12/1995; 222(5):670-6. · 7.49 Impact Factor
  • Article: Treatment of renal artery stenosis after kidney transplantation by percutaneous transluminal angioplasty: report of two cases.
    R H Hu, Y M Tsang, P H Lee, C J Lee, C S Lee
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    ABSTRACT: Graft renal artery stenosis is one of the causes of hypertension after kidney transplantation. Surgical angioplasty was the treatment of choice before the development of percutaneous transluminal angioplasty (PTA) in the 1970s. Surgical repair was associated with some morbidity and graft loss while PTA was reported to have controversial results in the treatment of this disease. This is a report of two cases of graft renal artery stenosis occurring four and seven months after kidney transplantation that were treated with PTA. The immediate and short-term results of PTA were excellent, but the long-term effects require further follow-up.
    Journal of the Formosan Medical Association 11/1994; 93(10):875-8. · 1.13 Impact Factor
  • Article: Findings of anomalous pulmonary venous return using MRI.
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    ABSTRACT: This study represents a preliminary retrospective assessment of the value of spin-echo magnetic resonance imaging (MRI) in detecting and describing total or partial anomalous pulmonary venous return (APVR). MRI was performed in 21 cases of APVR; orthogonal planes were used in all. Of the 21 cases, 19 were classified as total APVR (TAPVR) and two were partial APVR (PAPVR). Of the 19 cases of TAPVR, seven supracardiac, nine cardiac, one infracardiac and two mixed type were noted. The detection rate of each pulmonary vein combined in all three planes was 57% in the right superior pulmonary vein (RSPV), 62% in the left superior pulmonary vein (LSPV), 76% in the right inferior pulmonary vein (RIPV), and 86% in the left inferior pulmonary vein (LIPV). The axial plane was most effective (RSPV: 38%; LSPV: 52%; RIPV: 71%; LIPV: 81%). The coronal plane offered a better detection rate than the axial plane in RSPV (43%) and additional information of bronchial and visceral situs. Imaging of the combined axial and coronal planes was sufficient to evaluate each individual pulmonary vein. The sagittal plane gave no additional information in this respect. Accurate identification of pulmonary venous confluence and anomalous pulmonary venous channel was 95% (20/21). Limitation of echocardiography and and angiocardiography makes cardiac MRI important in assessing pulmonary vein and pulmonary venous confluence. It obviates the need for invasive angiocardiography and is an important supplement to an inadequate echo.
    Journal of the Formosan Medical Association 07/1994; 93(6):462-8. · 1.13 Impact Factor

Institutions

  • 1997–1998
    • Taipei Medical University
      • • Department of Medical Imaging
      • • Department of Internal Medicine
      Taipei, Taipei, Taiwan
  • 1991
    • Massachusetts General Hospital
      • Department of Radiology
      Boston, MA, USA
  • 1988
    • National Taiwan University
      • College of Medicine
      Taipei, Taipei, Taiwan