background and objective: mediastinal masses in children are a heterogenous group of asymptomatic potentially life-threatening congenital, infectious, or neoplastic lesions that present complex diagnostic and therapeutic dilemmas. materials and methods: the clinical and laboratory features of 65 patients who had open biopsies in ali-asghar hospital over 11 years were reviewed. results: seventy-...

osteosarcoma (osteogenic sarcoma: os) is the most common primary malignant bone tumor of long bones, whereas primary osteosarcoma of chest wall, especially in sternum, is extremely rare. we report a 57-year-old man with an immobile slow growing mass located in the middle of the sternum. the patient had no significant pain or tenderness and the past medical history was not remarkable. ct-scan sh...

Over the last several years, democratic citizens and theorists have been grappling with an upsurge in political commentary on crisis decline of legitimacy around world. Increasingly, theoretical attention is turning from philosophical justification ambitious moral ideals democracy, to interpretation potentials within existing practice for renewal repair. This review article examines three new b...

background some sonographic positions for detection of abdominal wall hernias needed .in this paper we described the sonographic technique of abdominal wall hernia. methods from june 2013 to july 2016, three hundred seventy four patients referred in our department for evaluation of abdominal wall hernia (median age, 38 years; range 2 - 86 years). one hundred and ninety patients had abdominal he...

In bone tissue engineering, ionic doping using bone-related minerals such as magnesium (Mg) or strontium (Sr) is a promising strategy to make up for the inherent disadvantages (low solubility) of various apatite-based materials (such fluorapatite (FAp) and hydroxyapatite (HA)). Therefore, some studies in recent years have tried address lack-of-methodology improve properties bioceramics field. E...