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What is this abnormal mass present in the pelvic region?
First of all, where are the kidneys? Features of a pancake kidney shape in the pelvic region.
Incidental finding on an MRI study of the lumbosacral region: inability to identify either kidney in its normal anatomical location.
Instead, both kidneys are noted to be ectopically located and fused within the right para midline pelvic region, giving the characteristic appearance of a "pancake kidney".