An Evaluation of Ultrasound Features of Breast Fibroadenoma.

Background: Breast cancer is among the most common cancers in the world. Ultrasound evaluations of breast have come into attention as an alternative route. Ultrasound features of benign lesions such as fibroadenoma can be overlapping with those in a malignant tumor.

The prevalence of hepatitis B virus surface antigen (HBsAg) variations and correlation with the clinical and serologic pictures in chronic carriers from Khorasan Province, North-East of Iran.

This study was designed to determine the correlation of hepatitis B virus surface Ag (HBsAg) variations with the clinical/serological pictures among chronic HBsAg positive patients. The surface gene (S-gene) was amplified and directly sequenced in twenty-five patients. Eight samples (group I) contained at least one mutation at the amino acid level.

Release profile and stability evaluation of optimized chitosan/alginate nanoparticles as EGFR antisense vector.

Chitosan/alginate nanoparticles which had been optimized in our previous study using two different N/P ratios were chosen and their ability to release epidermal growth factor receptor (EGFR) antisense was investigated. In addition, the stability of these nanoparticles in aqueous medium and after freeze-drying was investigated. In the case of both N/P ratios (5, 25), nanoparticles started releasing EGFR antisense as soon as they were exposed to the medium and the release lasted for approximately 50 hours.