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Crossed fused ectopic kidneys diagnosed by renal DTPA study.

Technetium-99m DTPA renal imaging in a 15-year-old boy with a history of frequent urinary tract infections was performed and revealed two structures in the left abdomen: the first located superiorly maintained its reniform structure and had normal flow, extraction, and excretion. A second inferiorly located structure had poor extraction and excretion that did not improve appreciably with the administration of Lasix intravenously. A faint left ureter coursing ipsilaterally to the left bladder was seen; a prominent ureter originating from the lower moiety, crossing midline and coursing toward the right side of the bladder was also noted