Immunoglobulin G4 disease-related retroperitoneal fibrosis: A series of five cases.

Unlabelled: Immunoglobulin G4 (IgG4)-related disease has the potential to impact any part of the body, including the walls of large- and medium-sized blood vessels and the ureters. While histopathologic examination is currently the standard method for identifying organ involvement and diagnosing IgG4-related disease (IgG4-RD), obtaining biopsy or surgical samples from vessel or ureteral walls is challenging. Given that patients may display only mild symptoms, non-invasive imaging plays a vital role in both diagnosing and managing IgG4-related diseases.

Dual-energy computed tomography: A reliable and established tool for differentiation of uric acid from nonuric acid renal Stones.

Background: Dual-energy computed tomography (DECT) utilises the technique of simultaneous image acquisition of a body part at two different energy levels of the X-ray tubes. We used the DECT in this project to study its accuracy in non-invasive in vivo differentiation of uric acid (UA) calculi from non-UA calculi using the 3 generation dual-source computed tomography (CT) scanner.

Materials And Methods: The DECT ratios of the various stones were noted and compared with the postextraction analysis of stones for composition.