Stipple sign in transitional cell carcinoma of the renal collecting system is best demonstrated by –
The stipple sign refers to tracking of contrast into the interstices of a papillary lesion. This is seen in Intravenous urography (intravenous pyelography) of transitional cell carcinoma of renal collecting sysym. Other signs on IVP are filling defect; Calyceal obliteration & amputation; hydronephrosis with soap bubble nephrogram.
Intravenous urography
Retrograde pyeloureterography
Radionuclide scan
Ultrasound scan