Nowadays the number of asymptomatic, incidental @entity5 being detected increased as a result of the widespread use of noninvasive abdominal imaging modalities, including ultrasound and computed tomography (CT) and magnetic resonance imaging. The aim of the study is to analyze the atypical, complex morphologic changes and anatomical variants of renal structure, with @entity5 -like appearance. This is important especially in screening revealing @entity5 in asymptomatic @entity1 or in @entity1 with atypical symptoms. Material comprises a group of 186 @entity1 in which the US examination was performed between 1996 and 2002, in 2nd Department of Radiology, Medical University of Lublin. In 20 @entity1 the local thickening of renal cortex was found, protruding from the surface of the kidney, so-called " @entity8 ", constituting the anatomical variation. In eight cases the cortex thickening suggesting the presence of the @entity8 , proved to be @entity703 . Diagnosing of small asymptomatic @entity5 , less than 3 cm in diameter, was difficult. They have appearance of protruding cortex thickening distorting the renal outlines. The assessment of renal outlines was an important morphologic factor. Small @entity703 showed @entity154 . Regular @entity5 shape was rarely seen in larger @entity5 . The normal renal shape was more often seen in small @entity5 , while the large mass produces irregular distortion of renal outline. In four cases the oblique section of the renal pyramid has within the central part of kidney the appearance of @entity5 . The differentiating of oval cortex thickenings protruding from the lateral renal margin--presenting "renal gibbuses"--and small @entity703 is difficult and requires supplementary helical CT examination with spatial reconstructions. Dynamic CT with early bolus of contrast agent and late sections is indicated. The lesion sizes, regularity of its margins, distortion of renal shape, echogenicity similar with the normal renal cortex were important in US examination. MR enhanced with @entity12306 and CT guided biopsy enables definite diagnosis.

Differential diagnosis of XXXX .

@entity1 :: ('9606', 'Species') :: ['patients'] @entity154 :: ('MESH:D000013', 'Disease') :: ['anatomical anomalies'] @entity8 :: ('MESH:D007674', 'Disease') :: ['renal gibbus'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'oval pseudo-tumor', 'tumors'] @entity12306 :: ('MESH:C028145|MESH:D004369', 'Chemical') :: ['DTPA'] @entity703 :: ('MESH:D007680', 'Disease') :: ['renal tumors']
@entity703 :: (MESH:D007680,Disease) :: ['asymmetrical renal cortex thickening and solid renal tumours']
