Balloon on a String
Bear Claw Sign
Beak Sign
Bullet and Bodkin Sign”
Staghorn Calculus
Bear Claw Sign
Cobra head Sign
Cobweb Sign or Spider Web Sign 
Comet Sign
Crescent Sign
Dromedary Hump
Drooping Lily
Faceless Kidney
Goblet Sign
Jack Stone
Keyhole Sign
Lobster Claw Sign = Ball on a Tee Sign
Maiden Waist Retroperitoneal Fibrosis
Pear Shaped Pie in the Sky Bladder
Phantom Calyx
Rim Sign
Reversed rim sign
Spaghetti Sign
Cobweb Sign or Spider Web Sign 
Spoked Wheel Pattern (Oncocytoma
Spotted Nephrogram

String of Pearls FMD
Target Sign
Threads and Streaks Sign

 

Title
Bear paw sign
Dromedary hump sign
drooping lily sign
Elephant on a flagpole sign
faceless kidney
Golf ball on a tree sign Lobster Claw Egg in a Cup

 

Links and References

Dyer-et-al-2004-classic-signs-in-uroradiology Radiographics