ROC-king onwards: intraepithelial lymphocyte counts, distribution & role in coeliac disease mucosal interpretation.

OBJECTIVES: Counting intraepithelial lymphocytes (IEL) is central to the histological diagnosis of coeliac disease (CD), but no definitive 'normal' IEL range has ever been published. In this multicentre study, receiver operating characteristic (ROC) curve analysis was used to determine the optimal cut-off between normal and CD (Marsh III lesion) duodenal mucosa, based on IEL counts on >400 mucosal biopsy specimens. DESIGN: The study was designed at the International Meeting on Digestive Pathology, Bucharest 2015. Investigators from 19 centres, eight countries of three continents, recruited 198 patients with Marsh III histology and 203 controls and used one agreed protocol to count IEL/100 enterocytes in well-oriented duodenal biopsies. Demographic and serological data were also collected. RESULTS: The mean ages of CD and control groups were 45.5 (neonate to 82) and 38.3 (2-88) years. Mean IEL count was 54±18/100 enterocytes in CD and 13±8 in normal controls (p=0.0001). ROC analysis indicated an optimal cut-off point of 25 IEL/100 enterocytes, with 99% sensitivity, 92% specificity and 99.5% area under the curve. Other cut-offs between 20 and 40 IEL were less discriminatory. Additionally, there was a sufficiently high number of biopsies to explore IEL counts across the subclassification of the Marsh III lesion. CONCLUSION: Our ROC curve analyses demonstrate that for Marsh III lesions, a cut-off of 25 IEL/100 enterocytes optimises discrimination between normal control and CD biopsies. No differences in IEL counts were found between Marsh III a, b and c lesions. There was an indication of a continuously graded dose-response by IEL to environmental (gluten) antigenic influence.

Positive and Negative Predictive Factors for Treatment Response in Patients with Chronic Viral C Hepatitis.

More than 200 million people worldwide are infected with hepatitis C virus. In the United States, suggested estimates are that more than 5 million people live with HCV. The purpose of this paper is to identify, within the Southwestern Romanian population, host factors associated with the response to Pegylated Interferon and Ribavirin treatment for Hepatitis C virus infection. We investigated several factors and their correlation to sustained virological response. The study included 267 patients diagnosed with chronic Hepatitis C between 2013 and 2016, treated with Pegylated Interferon and Ribavirin in the 2nd Medical Department of the Emergency County Hospital Craiova. From the 267 patients included in this study, 149 (55,81%) achieved sustained virological response during the 48 weeks of treatment. Several factors were taken in consideration regarding the treatment response. Positive predictive factors for achieving sustained virological response were: the female gender (35,96%), Low Viral Load at the beginning of treatment, Early Virological Response 75 (28,09%), Rapid Virologic Response133 (49,81%), and stage of fibrosis, with Stage F1 having the highest rate of Sustained Virological Response during double therapy 81 (30,34%). Although at the present time a number of more effective antiviral products have been approved for the treatment of viral hepatitis C, in our country the standard of treatment remains with PegInterferon and Ribavirin therapy. Multiple clinical and paraclinical tools can identify patients with a high chance of responding to treatment, or those who, during treatment, do not meet the criteria for prolonging therapy.