an unusual histological pattern made up of tubular structures and clusters of apparently epithelial cells floating within sinusoidal deposits of tamm-horsfall ( th ) protein was observed in several lymph nodes removed with renal tumours ( 3 wilms ' tumours , 1 cystic nephroma ) and pathological but non neoplastic kidneys ( 2 cases of reflux nephropathy ) .
C0022665
renal tumours
C0027708
wilms