[MR imaging in diagnosis of acute gestational pyelonephritis]

We studied efficacy of using MR imaging (MRI) in differential diagnosis of serous and pyodestructive pyelonephritis in pregnant women. We performed MRI (MR tomograph Siemens Magnetom Symphony, Germany; 1.5 T, 20 mT/m) in 28 women with acute gestational pyelonephritis (pregnancy trimester II and III) to reject pyodestructive changes in the kidneys, paranephral fat, including cases with drained kidney. Three women were operated. The decision about operation was made basing on clinical, ultrasound, MRI pictures which confirmed the diagnosis of pyodestructive process. In the other cases MRI definitely described the state of the parenchyma and calyculopelvic renal system after drainage, rejected pyodestructive lesion, and, finally gave grounds for decision on conservative therapy which later proved effective. Thus, MRI is a method of choice in suspected pyodestructive gestational pyelonephritis, in ideal conditions it is a routine method of examination of pregnant women when it is necessary to get significant information on anatomofunctional status of the kidneys and urinary tract.