Horseshoe shape: Not dangerous. Right ; left kidney are fused together at the lower end. Isthmus or junction between the kidneys can be of variable thickness varying from think kidney tissue to just a fibrous band. Not dangerous. Can be cause of microscopic hematuria (blood in urine), occasionally responsible for mid-abdominal pain. Can be associated with hydronephrosis due to mild partial ureteral obstruction.
Answered 2/17/2014
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