Description
The cut surface of the kidney shows a finely papillary tumour mass covering the whole of the exposed
calyceal system in the upper pole; there is bloodclot present in the lower part. In the renal
parenchyma there are a number of discreet white areas apparently confined to the medulla and not
apparently within the cortex. In this particular specimen much of the spread within the kidney is due
to intra-tubular invasion with peripheral spread and growth to produce the discreet nodules seen. A
further possibility is that some of the spread is due to retrograde lymphatic permeation and to direct
infiltration.