Diagnosis of Choledocholithiasis by Barium Duodenal Examination

Spiral filling defect in the common bile duct

“…0364-2356/79/0004-0041 $01.00 9 1979 Springer-Verlag New York Inc. pilla can be caused by stone impaction [2]. On the other hand, as shown in our patient, a large but smooth papilla can represent a malignant neoplasm.…”

“…The enlarged smooth papilla was thought to b'e secondary to an impacted CBD stone [1,2]. The spiral-shaped filling defect was the only finding that failed to fit this hypothesis.…”