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Multicystic Dysplastic Kidneys Suggesting Hydronephrosis During Tc-DTPA Imaging

James Whitcomb Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, Indiana

Correspondence: For reprints contact: Aslam R, Siddiqui, MD, Div. of Nuclear Medicine, Indiana Univ. Med. Center, Indianapolis, IN 46223.

ABSTRACT

Tc-99m DTPA renal scans on two infants with flank masses were interpreted as consistent with hydronephrosis and obstruction of the uretopelvic junction because of delayed accumulation of the radiotracer in the initially photon-deficient regions. However, both these patients were found to have multicystic dysplastic kidney. It appears that for proper diagnosis more attention should be paid to the location of the functioning cortex rather than to the delayed images.