This special issue of the Journal of Radiology Case Reports honors the reviewers who donated their time and expertise throughout the year 2012 to the high quality and success of this journal.

This special issue of the Journal of Radiology Case Reports honors the reviewers who donated their time and expertise throughout the year 2011 to the high quality and success of this journal.

Liposarcoma frequently occurs in the retroperitoneum and lower extremities, accounting for 20% of all mesenchymal malignancies. Liposarcomas vary by histology and can be classified into four types. Those four types are well differentiated, myxoid/round cell, pleomorphic and dedifferentiated. Due to retroperitoneal location of this tumor, it is expected to affect the kidney position. Renography has provided a unique tool for noninvasive evaluation of various functional parameters e.g. relative renal function. Most renography studies are carried out using the posterior view, under the assumption that the depths of both kidneys are similar so that the radiotracer counts in the region of interest will be attenuated to the same extent. Errors in estimation of the relative renal function may arise if the kidneys are at different depths e.g. secondary to a pushing tumor. Geometric mean imaging from combined anterior and posterior views helps to overcome this issue. This case shows the impact of geometric mean imaging in the truthful determination of partial function in patients with retroperitoneal liposarcoma.

This special issue of the Journal of Radiology Case Reports honors the reviewers who donated their time and expertise throughout the year 2010 to the high quality and success of this journal.

This special issue of the Journal of Radiology Case Reports honors the reviewers who donated their time and expertise throughout the year 2009 to the high quality and success of this journal.

This article focuses on a relatively new concept in the Internet: “Social networking” and especially on one program that successfully found a unique way to provide a social network for Radiology: Radiolopolis. Radiolopolis (www.Radiolopolis.com) is an international Radiology network to promote education, research and clinical practice in Radiology. What makes this Radiology community unique and special is that the founders of Radiolopolis implemented multiple educational and clinical/practical programs which have been developed over the past years.

This special issue of the Journal of Radiology Case Reports honors the reviewers who donated their time and expertise to the high quality and success of this journal.