Poverty is a severe problem in Africa, Asia, South America and even in pockets of the
developed world. Addressing poverty alleviation via the expanded use of biological
nitrogen fixation in agriculture was the theme of the 15th International Congress on
Few fi elds of medicine have witnessed such impressive progress as the diagnosis and
treatment of liver tumors. Advances in imaging technology, the development of novel
contrast agents, and the introduction of optimized scanning protocols have greatly
facilitated the non-invasive detection and characterization of focal liver lesions. Furthermore,
image-guided techniques for percutaneous tumor ablation have become an
accepted alternative treatment for patients with inoperable liver cancer.
The diagnosis of Hodgkin's disease is established by review of an adequate biopsy specimen by an expert hematopathologist. In the United States, most patients have nodular sclerosing Hodgkin's disease, with a minority of patients having mixed-cellularity Hodgkin's disease. Lymphocyte-predominant and lymphocyte-depleted Hodgkin's disease are rare. Mixed-cellularity Hodgkin's disease or lymphocyte-depletion Hodgkin's disease are seen more frequently in patients infected by HIV (Fig. 105-11).