Kin Kong Li

Correlation of serum biomarkers with clinical severity and mucosal inflammation in Chinese ulcerative colitis patients

OBJECTIVE:  Serum biomarkers are commonly used for diagnosing and monitoring the disease activity of ulcerative colitis (UC) patients. However, their role in predicting active mucosal inflammation on Chinese patients is unknown. Our aim was to determine the sensitivity and correlation of these biomarkers with clinical severity and mucosal inflammation.

Older age as a poor prognostic sign in patients with pyogenic liver abscess

BACKGROUND Previous studies have focused on the role of age as a prognostic factor in pyogenic liver abscess (PLA) and results have been controversial. The aim of this study was to compare the clinical characteristics of PLA in elderly (age ≥65 years) and non-elderly patients in order to identify any differences so that an early diagnosis can be made and appropriate therapeutic measures can be instituted promptly. METHODS We performed a retrospective analysis of patients with PLA. The demographic and clinical features, laboratory and imaging findings, management, and clinical outcomes of elderly and non-elderly patients were studied. RESULTS Between January 2000 and December 2010 inclusive, 319 patients had PLA; 168 (52.7%) were aged ≥65 years. Elderly patients were more likely to have acute onset of symptoms (4.2 vs. 5.3 days, p < 0.04), co-morbidities, and respiratory symptoms (25.6% vs. 14.6%, p < 0.01). They also had lower serum bilirubin (28.1 vs. 37.1 μmol/l, p < 0.04), alanine aminotransferase (71.6 vs. 94.3 U/l, p < 0.02), and glycosylated hemoglobin (8.1% vs. 10%, p < 0.01), and more often had septal lobulation (64.3% vs. 54.3%, p < 0.04) and pneumobilia (10.1% vs. 4.0%, p < 0.02). Moreover, they required a longer duration of oral antibiotics (2.63 vs. 2.05 weeks, p < 0.01) and had a higher incidence of acute coronary syndrome during the illness (7.7% vs. 2.0%, p < 0.01). Gram-negative organisms were the dominant isolates in both groups, but the elderly had a lower incidence of Gram-positive infections (5.4% vs. 13.2%, p < 0.01). Lastly, old age was associated with local recurrence of PLA (odds ratio (OR) 3.1, 95% confidence interval (CI) 1.0-9.7, p < 0.04) and mortality (OR 3.17, 95% CI 1.25-8.04, p = 0.015). CONCLUSIONS Elderly patients tend to have a more atypical presentation in PLA, for which clinicians should be on high alert. We found older age to be associated with a higher recurrence of PLA and a higher mortality rate.

Intestinal tuberculosis complicated with perforation during anti-tuberculous treatment in a 13-year-old girl with defective mitogen-induced IL-12 production

Interleukin-12 (IL-12) is a cytokine which is secreted by activated phagocytes and dendritic cells and promotes cell-mediated immunity to intracellular pathogens, by inducing type 1 helper T cell (TH1) responses and interferon- γ (IFN- γ) production. Defects in the IL-12 may cause selective susceptibility to intracellular pathogens, such as mycobacteria. We herein report on a 13-year-old girl with defective mitogen-induced IL-12 production, who developed intestinal tuberculosis with wide dissemination involving the lung and urinary tract. She improved gradually, but developed terminal ileal perforation approximately 6.1 months following initiation of anti-tuberculous treatment. The paradoxical response phenomenon was suspected. The girl subsequently underwent surgical resection of the affected bowel segment with a temporary double barrel stoma, and ileocolonic anastomosis was performed after the completion of the anti-tuberculous therapy. The patient remained well, with no evidence of recurrent tuberculosis in the past 5 years. This case illustrates the possibility of underlying primary immunodeficiency in a patient with disseminated tuberculosis; delayed tuberculous intestinal perforation can develop during chemotherapy for tuberculosis.

Age-related differences in the clinical course of Crohn’s disease in an asian population: A retrospective cohort review

The aim of this study was to compare the clinical characteristics and treatment outcomes of patients with young- and adult-onset Crohn’s disease. Among 79 consecutive Crohn’s disease patients (11 (13.92%) with onset ≤16 years old), young-onset Crohn’s disease was significantly associated with fever(36.36 vs. 14.71%, P 0.041), weight loss (72.7 vs. 29.4%, P 0.003), isolated abdominal pain (45.45 vs. 16.18%, P 0.013), lower body mass index ( 17.32 vs. 21.29 kg/m2, P 0.019), and extra-intestinal manifestation, particularly oral (45.5% vs. 22.1%, P 0.049) and perianal lesion (63.6% vs. 36.8%, P 0.046). In both groups, ileocolonic disease and inflammatory lesion were the most prevalent site of involvement and dominant disease behavior respectively. Their complication and bowel resection rate were similar but the former took a longer period of time to develop in the young-onset group (84 vs 24 month, P 0.018). Cox proportional hazard regression analysis revealed that active smoking and delayed use of immuno-suppressive therapy were the only independent risk factors associated with increased risk of complications.

Comparison of efficacy and renal safety of telbivudine and entecavir in treatment-naive elderly patients with chronic hepatitis B.

Background Data comparing the clinical outcomes of telbivudine (LdT) and entecavir (ETV) in elderly patients with chronic hepatitis B are limited. Goals The aim of the present study was to compare the efficacy and renal safety of LdT and ETV in treatment-naive elderly (≥60 years) patients with chronic hepatitis B. Methods A total of 33 patients treated with LdT were consecutively enrolled in the study. Each patient was matched on the basis of age, sex, and baseline hepatitis B virus (HBV) DNA levels with three to four randomly selected controls treated with ETV. Results Clinical characteristics were comparable between the two groups. Higher cumulative HBeAg-seroconversion rates were observed in the LdT group than in the ETV group after 2 years (50 vs. 20%) and 3 years (50 vs. 26.67%) of treatment (all P<0.0001). Virological response rate at week 24 was significantly lower in the LdT group than it was in the ETV group (54.55 vs. 70.87%, P<0.0001), but no significant difference was noted in long-term cumulative rates of undetectable HBV DNA levels between the two groups (P=0.562). Virological breakthrough occurred in six (18.18%) LdT patients, with no such cases reported in the ETV group (P<0.0001). Antiviral resistance was strongly associated with LdT use and the absence of undetectable HBV DNA at weeks 12 and 24 (P<0.0001). During the study, significant improvement was observed in the estimated glomerular filtration rate and model for end-stage liver disease score in LdT versus ETV group. Conclusion LdT has a lower clinical efficacy for viral suppression and a higher risk of antiviral resistance than does ETV. However, LdT resulted in higher HBeAg-seroconversion rates and better renoprotective effects than did ETV.

Refractory celiac disease: An unusual disease in a Chinese patient

Celiac disease (CD) is an autoimmune disease characterized by mucosal inflammation and villous atrophy of the small bowel upon exposure to ingested gluten. Although common in developed countries, it is extremely rare in the Chinese population. Refractory celiac disease (RCD) is a rare complication of CD with poor prognosis. Patients may die of severe malabsorption or development of enteropathy‐associated T‐cell lymphoma. We report a case of RCD in a Chinese woman who required steroid therapy in addition to a gluten‐free diet to induce disease remission. The possibility of CD in Chinese patients should not be overlooked.

Role of C-reactive protein in response-guided therapy of pyogenic liver abscess.

Background Protocols for antibiotic treatment of pyogenic liver abscess (PLA) are usually based on clinicians’ own experience without any validation. Our study was to evaluate the clinical implication of C-reactive protein (CRP) in predicting treatment outcome and adequacy of antibiotic therapy of PLA. Patients and methods Patients with PLA in whom white blood cell (WBC) count, erythrocyte sedimentation rate (ESR), and CRP were checked regularly during the clinical course were included. The prolife of CRP during the clinical course was compared with that of ESR and WBC. The usefulness of CRP in predicting the chance of recovery and adequacy of antibiotic therapy was examined. Results From 2000 to 2011, 109 patients with PLA underwent regular monitoring of WBC, ESR, and CRP. Except for ESR, both WBC and CRP showed an initial rapid reduction in first 3 weeks, followed by a relatively slow decrease. From week 3 to week 6, the CRP ratio (relative to CRP at week 1) of patients with and without adverse events (i.e. including mortality) was compared; a significant difference was found at week 3 (P=0.001), week 4 (P=0.004), week 5 (P=0.011), and week 6 (P=0.018), whereas no statistically significant difference was found in the WBC ratio over the same period. By week 3, a CRP ratio of 0.423 or less was a marker of good outcome (sensitivity 0.846; specificity 0.667) and was also a marker of adequacy of antibiotic therapy of 5 weeks or less (sensitivity 0.786; specificity 0.714) if the ratio was 0.278 or less. Conclusion Weekly CRP measurement was useful in the identification of patients with PLA with good outcome and adequacy of antibiotic therapy of 5 weeks or less.

Protein-losing enteropathy associated with or without systemic autoimmune disease: what are the differences?

Objective The aim of our study was to compare protein-losing enteropathy (PLE) associated with or without systemic autoimmune (SA) diseases. Methods Patients diagnosed with PLE were selected, and their clinical characteristics, laboratory, endoscopic and imaging characteristics, treatment, and outcome were analyzed. Results From 2001 to 2010, 74 patients (60 patients with SA disease) with a female predominance were diagnosed with PLE. The SA group tended to be younger, presented early (4.3 vs. 7 weeks, P=0.08), and had significantly more mucocutaneous–articular involvement (16.7 vs. 0%, P<0.05; 50 vs. 0%, P<0.02; 43.3 vs. 0%, P<0.01), compared with the other group, which showed more weight loss (64.3 vs. 25%, P<0.01), malaise and fatigue (57.1 vs. 28.3%, P<0.02), and tended to have more gastrointestinal (GI) symptoms. The SA group was associated with lymphopenia (0.8 vs. 2.7×109/l, P<0.01), hyperglobulinemia (43 vs. 31.2 IU/l, P<0.04), lactate dehydrogenase (511.1 vs. 393.5 IU/l, P<0.05), hematuria (48.3 vs. 7.1%, P<0.01), and pyuria (23.3 vs. 0%, P<0.03), whereas the non-SA group had a higher platelet count (402 vs. 262.5×109/l, P<0.01) and alkaline phosphatase (111 vs. 78.2 IU/l, P<0.03) on admission. A subgroup analysis of patients with SA disease showed that more lupus patients had pericardial effusion (14.6 vs. 0%, P=0.08), polyarthritis (50 vs. 16.7%, P=0.02), lower C3 level (0.5 vs. 0.85 mg/l, P<0.01), antinuclear factors (89.6 vs. 58.3%, P<0.01), and antiextractable nuclear antigen antibody (73.3 vs. 37.5%, P<0.03), whereas nonlupus patients had higher C-reactive protein (87.9 vs. 40 mg/l, P<0.01) and more antineutrophil cytoplasmic antibody (ANCA) (60 vs. 3%, P=0.00). Thirty-seven (71%) patients with SA disease had diffuse nonerosive erythematous GI mucosa with chronic inflammatory cells in the lamina propria layer, and 12 (85.7%) patients without SA disease had focal lesions. The treatment response was comparable between the two groups. However, the time required to normalize the serum albumin level (6.3 vs. 12.3 months, P=0.02) of patients with SA disease was much shorter than that of the non-SA group and those of inflammatory markers, specifically, C-reactive protein and complement C3, of its own group (6.3 vs. 11.6 vs. 12.1 months, P<0.04). More patients without SA disease had infective episodes during the management period (14.3 vs. 1.7%, P<0.01). Conclusion Patients with PLE associated with SA disease tend to have a distinct clinical syndrome with regard to the extent of clinical manifestations and laboratory, endoscopic, and histological features compared with those without. Patients without SA disease are more prone to develop complications and mortality. However, both can be effectively treated with comparable treatment response.

Choledochal varices bleeding: A case report

Choledochal varices are a rare cause of hemobilia associated with chronic portal vein thrombosis. We present a case of chronic portal vein thrombosis complicated with bleeding from choledochal varices. The presentation, clinical manifestations and management are described.

Comparison of clinical efficacy and renal safety of telbivudine and entecavir in chronic hepatitis B patients receiving cytotoxic chemotherapy.

Limited data is available on the clinical outcomes of telbivudine (LdT) and entecavir (ETV) in pre‐emptive antiviral chemoprophylaxis. This study aimed to evaluate the clinical efficacy and renal safety of LdT and ETV in patients with chronic hepatitis B (CHB) who received cytotoxic chemotherapy.