Phantom calyx

Last revised by Daniel J Bell on 27 Jan 2018

A phantom calyx is a solitary calyx which fails to opacify with contrast amidst an otherwise well-opacified pelvicalyceal system. It is due to an intrarenal process which has infiltrated and caused obliteration of the involved collecting system element.

It may be seen in:

If the calyx is dilated and filled with tumor (but still visible) then it is referred to as an oncocalyx.

ADVERTISEMENT: Supporters see fewer/no ads