BACKGROUNDDuodenal biopsy is required for diagnosis of celiac disease in adults, although some studies have suggested adequate accuracy of serology alone.Objective: We aimed to assess the correlation between anti-tissue transglutaminase (tTG) titer and pathological findings and to define the specific level of tTG for predicting celiac disease in adults without the need for biopsy sampling.METHODSThis descriptive study was done on 299 participants. The tTG titer and pathological findings of duodenal biopsy samples were used for this study. Analysis of Receiver operating characteristic (ROC) curve was used to find a cut-off point of anti-tTG antibody for mucosal atrophy.RESULTSMean tTG titers was significantly higher in patients graded as Marsh III≥ 3 (p=0.023). ROC curve analysis showed 89.1% sensitivity for cut-off point≥76.5 IU/mL of anti-tTG. For Marsh≥ II, specificity was 28% and positive predictive value was 91%.CON CLUSIONThere is a linear correlation between increasing tTG level and Marsh I to III. Specificity of tTG titer more than 200 was 100% for Marsh >2.

- Helicobacter pylori (HBP) is reported as one of the main causes of peptic ulcer disease (PUD) and gastric cancer in the world. The challenge for finding an optimal treatment regimen for HBP eradication is still a matter of concern. The aim of this study was to compare the HBP eradication rate as well as side effects between two 10-days treatments of the standard triple and sequential regimen. This study was performed on patients with dyspepsia and HBP positive. Patients were categorized in two treatment groups including; standard (Omeprazole, Amoxicillin, and Clarithromycin) and sequential treatment (Omeprazole, Amoxicillin, Clarithromycin, and Metronidazole). HBP eradication rate, side effects, and treatment costs were compared between two groups. One hundred thirty-two patients (58 males, 74 females) with a mean age of 42.7±14.2-year-old were studied in two groups of Standard Treatment (n=66) and Sequential Treatment (n=66). There were not any significant differences between two groups regarding baseline features. The overall rate of HBP eradication was estimated to be 79.5%. Although, there was not any significant difference between the observed side effects, the mean cost of treatment in standard was significantly lower than that in the sequential group (P=0.001). It seems that there are not any clinical differences between 10-day treatment plan of the standard triple and sequential therapy in the case of HBP eradication and side effects. However, the sequential treatment might be a better option as the economic point of view. © 2019 Tehran University of Medical Sciences. All rights reserved. Acta Med Iran 2019;57(4):224-228.