Background: Dental health care providers are at risk of infection with hepatitis B virus (HBV). Dentists can occupationally become infected with HBV through needle sticks or exposure to blood and other body fluids. Objectives: To evaluate anti-HBs antibody titer in students, professors, clinical assistants and non-clinical staff of Faculty of Dentistry, Tehran University of Medical Sciences (TUMS), and to investigate the probable correlation between the level of immunity and a number of associated factors. Patients and Methods: 230 participants who had a history of previous HBV vaccination (receiving at least two doses of HBV vaccine) and a negative history of being infected with HBV were studied. Participants’ data were recorded using a checklist, and the level of antibody was measured by enzyme-linked immunosorbent assay (ELISA).Results: While there existed statistically significant correlations between age, occupation, smoking, complete and scheduled vaccination and time of the last vaccination with the level of anti-HBs antibody, the correlation between gender and level of the antibody was not significant. Multiple regression analysis revealed significant association between immune response and age and time of the last vaccination.Conclusions: Due to the significant correlation between younger age and anti-HBs antibody titer in our study, it makes sense to establish a mandatory complete and scheduled vaccination program for all members of dental society younger than 40 years.

Introduction: Fanconi Syndrome is a diseases of the proximal renal tubules of the kidney in which glucose, amino acids, uric acid, phosphate and bicarbonate pass into the urine instead of being absorbed. To present two known cases of fanconi syndrome complicated with Hepatocellular Carcinoma (HCC).Case Report: The first case is a 17 years old girl, a known case of Fanconi syndrome and ascites. She had a large mass lesion measuring 48x45x44 mm with cystic component in the right liver lobe. An 18 year-old girl was the second case suffering from fanconi syndrome since 15 years ago. An ultrasonography study of her liver showed coarse echo with a mass measuring 68x38x68 mm in the right liver lobe. Liver needle biopsy of these patients was compatible with HCC.Conclusion: Reviews of literature and follow up of our patients with fanconi syndrome didn’t disclose any cases with HCC. It is uncertain whether the patients with fanconi syndrome are at risk of HCC or not. So it seems more investigation is needed to know the relationship between these disorders.