Infant with suspected congenital anomaly of the urinary tract

IVP of renal agenesis
AP image from the nephrogram phase of a vintage intravenous pyelogram shows a dense nephrogram in the right renal fossa representing the right kidney with contrast draining down the right ureter and filling the bladder. There is no nephrogram noted in the left renal fossa.

The diagnosis was agenesis of the left kidney.