Answer
The picture - a plain abdominal X ray - show a right sided staghorn calculus.
A staghorn calculus (also sometimes called coral calculi) is a very large calculus that nearly fills the calyceal system, with extensions into calyces that give the appearance of a stag's (deer) horns.
The formal definition of a stag horn calculus is an "upper urinary tract stone that involves the renal pelvis and extends into at least 2 calyces. All types of urinary stones can potentially form staghorn calculi, but approximately 75% are composed of a struvite-carbonate-apatite matrix. These so-called struvite stones, named after the 19th-century Russian diplomat Baron von Struve (friend and mentor to 19th-century discoverer Ulex), are also known as triple-phosphate (3 cations associated with 1 anion), infection (or infection-induced), phosphatic, and urease stones. (Ref: Meng et al emedicine)
Question
This is a plain X ray of the abdomen. What does it show?
