Hewitt M J, Older R A
AJR Am J Roentgenol. 1980 Mar;134(3):507-9. doi: 10.2214/ajr.134.3.507.
Multiple faceted stones can develop in any sacular structure. Five cases of renal stones are described, four cases with calculi in calyceal diverticuli and one case with calculi in a hydronephrotic sac. Emphasis is on the remarkably similar radiographic appearance these cases of renal stones have with gallstones.