Papillary stenosis is a disturbance of the sphincter of Oddi, a muscular valve, that prevents the opening and release of bile or pancreatic fluids into the duodenum in response to food entering the duodenum.
Obstruction of the valve can cause:
pancreatic pain
jaundice – bile leaking back into the blood stream.
↑Koch H, Classen M, Schaffner O, Demling L (1975). "Endoscopic papillotomy. Experimental studies and initial clinical experience". Scand. J. Gastroenterol. 10 (4): 441–4. doi:10.3109/00365528708996456. PMID1153938.