Win-Yiu Lui

Taipei Veterans General Hospital, T’ai-pei, Taipei, Taiwan

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Publications (5)18.24 Total impact

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    ABSTRACT: Prognostic factors of lymph node-negative gastric adenocarcinoma after curative resection have been discussed. Recurrent pattern of advanced lymph node-negative gastric cancer after curative resection has rarely been described. Recurrent sites and correlated clinicopathological factors of 372 patients with lymph node-negative advanced gastric adenocarcinoma that underwent R0 resection from 1988 to 2005 were analyzed. Recurrence was noted in 51 (13.7%) patients. Recurrent rates according to site of recurrence were 26 peritoneal seeding (51.0%), 26 locoregional (51.0%), 17 hematogenous (33.3%), and 4 lymph node metastasis (7.8%). Clinicopathological factors to predict peritoneal seeding were serosal exposure, lymphovascular invasion, Lauren's diffuse type differentiation and scirrhous stromal reaction. Serosal exposure, tumor size, microscopic infiltrating growth type predicts locoregional recurrence. Tumor had only lymphovascular invasion predict hematogenous spreading. Node-negative advanced gastric cancer has more peritoneal seeding and locoregional recurrence. Aggressive cell behavior predicted the route of tumor cell spreading.
    No preview · Article · Jun 2009 · Journal of Gastroenterology and Hepatology
  • Su-Shun Lo · Jen-Hao Chen · Chew-Wun Wu · Win-Yiu Lui
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    ABSTRACT: Activated nuclear factor-kappaB (NF-kappaB) is associated reportedly with the pathogenesis of numerous malignancies. This study investigated whether a common insertion (ins)/deletion (del) polymorphism (-94 ins/del ATTG) in the NFKB1 promoter is associated with susceptibility to gastric cancer and its tumor behavior. Blood samples from 182 gastric cancer patients and 116 controls were examined by polymerase chain reaction-based genotyping. Allelotype and genotype (polymorphism) of NFKB1 promoter in gastric cancer patients were analyzed with controls and patients' clinicopathologic factors to evaluate their association using a multivariate analytical model. The mean ages of patients and controls were 65.7 +/- 12.8, and 64.9 +/- 8.8 years old, respectively. Sex ratios (male to female) were 2.7:1 and 2.2:1, respectively. Insertion allelotype, genotypes with ins/ins, as well as ins allele carrier (ins/ins+ ins/del) were significantly greater in gastric cancer patients than in controls, especially in patients >65 years old, but not in younger patients. The polymorphism did not correlate with clinicopathologic factors and patient survival. NFKB1 could be a susceptible gene for gastric cancer and its functional polymorphism in promoter is associated with the risk of gastric cancer, particularly in aged patients.
    No preview · Article · Apr 2009 · Surgery
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    ABSTRACT: Heme oxygenase-1 (HO-1) gene, which encodes an oxidative response protein, plays a role in cytoprotection. A (GT)n dinucleotide repeat in HO-1 promoter is polymorphic and modulates the transcriptional activity of the gene. A HO-1 gene promoter polymorphism was reported to be associated with the risks of lung adenocarcinoma and oral squamous cancer. In this study, the correlation between the HO-1 gene promoter polymorphism and the clinicopathological characteristics, along with the risk of gastric cancer, was analyzed. We examined the genotypic frequencies of (GT)n repeats in 183 gastric cancer patients and 250 control subjects by PCR-based genotyping and DNA sequencing. The length polymorphisms of (GT)n repeats were classified into short (S) component (n <or= 25), medium (M) component (26 <or= n <or= 30) and long (L) component (n >or= 31). The distribution of S, M and L components in patient and control groups were evaluated to determine the correlation with susceptibility and clinicopathological characteristics of gastric adenocarcinoma. Higher frequencies of L-allele, L-allele carrier (S/L, M/L, L/L) and S/L genotype were found in gastric cancer patients. The frequencies of M-allele, M-allele carrier (M/M, M/L, M/S) and M/M genotype were significantly lower in patients with gastric cancer than controls. Furthermore, the frequency of lymphovascular tumor invasion was significantly lower in M-allele carriers compared to non-M-allele carriers (S/S, S/L, L/L) (p = 0.009). These findings suggest that the long (GT)n repeat of HO-1 gene promoter was associated with a higher frequency of gastric adenocarcinoma, and the medium (GT)n repeat might possess protective effect against gastric adenocarcinoma with a lower frequency of lymphovascular invasion in tumors.
    No preview · Article · Sep 2007 · Annals of Surgical Oncology
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    ABSTRACT: Prognosis for patients with early gastric cancer after surgical resection is excellent. The 5-year or even 10-year survival is more than 90%. In the present study, we investigated the result of treating early gastric cancer surgically in our hospital, with special reference to the risk factor(s) for tumor recurrence and the relationship between age and survival. From January 1988 to December 2002, a total of 479 patients with early gastric cancer underwent resection by our surgeons. Results of preoperative studies, operative findings, histopathology and postoperative follow-up were recorded respectively, and the postoperative disease-related survival, overall survival, tumor recurrence and recurrent patterns were analyzed. The clinicopathological factors were also analyzed to identify the risk factor(s) related to tumor recurrence. Older patients (>75 years old) had a poorer overall survival than younger patients. However, the disease-related survival was not significantly different between the two. Recurrence was observed in 21 patients, the most important factor of which was lymph node status. Lymph node metastases occurred in 54 patients (11.3%)-coming from mucosal tumors in 12 patients (4.4%) and from submucosal tumors in 42 (20.3%). When the size of the mucosal tumor was smaller than 1 cm, no lymph node metastasis was found in our patients. The most important risk factor of recurrence in early gastric cancer is lymph node status. Given the low probability of lymph node metastasis and recurrence in tumors less than 1 cm in diameter limited to the mucosa, more limited surgery maybe appropriate in these carefully selected instances.
    No preview · Article · Mar 2007 · Annals of Surgical Oncology
  • Cheng-Yuan Hsia · Chew-Wun Wu · Win-Yiu Lui
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    ABSTRACT: Heterotopic pancreas is a rare disease. We evaluated 17 patients treated surgically at our hospital. Epigastric pain (77%), abdominal fullness (30%), and tarry stools (24%) were the three most frequent symptoms and signs. The lesions were diagnosed as gastroduodenal tumors by gastroduodenoscopy (67%) or upper gastrointestinal series (71%). Among these, only one gastric submucosal tumor was considered to be heterotopic pancreas preoperatively. Three patients were found to have gastric tumor by abdominal ultrasound. Computed tomography, small-intestinal series, barium enema, endoscopic retrograde cholangiopancreatography, angiography, and cholescintigraphy did not help in disclosing lesion. In about half of the patients, the lesions were located at the stomach. Tumor size varied from 1 to 3 cm. Surgical excision relieved symptoms. These findings indicated heterotopic pancreas is still a difficult disease for diagnosis, regardless of the improvements of diagnostic tools and techniques.
    No preview · Article · Mar 1999 · Journal of Clinical Gastroenterology