Thorpe Plaza, Benjamín AlfonsoGonzález Vinagre, SalustianoSantos, DanielCaneiro Gómez, JavierBustamante Montalvo, Manuel2024-04-302024-04-302024Benjamin Thorpe, Salustiano Gonzalez Vinagre, Daniel Santos, Javier Caneiro Gomez, Manuel Bustamante Montalvo, Pharmacological intestinal obstruction because of calcium polystyrene sulfonate administration, Journal of Surgical Case Reports, Volume 2024, Issue 4, April 2024, rjae201http://hdl.handle.net/10347/33709Cation exchange resins are commonly used as treatment for hyperkalaemia in patients with chronic renal disease. There is a relation between cation exchange resins and the development of gastrointestinal adverse effects. A case of an intestinal obstruction at the terminal ileum is presented that underwent an ileocolic resection because of a critical stenosis of the intestine. The pathologist revealed abundant inflammatory cells together with deposits of calcium polystyrene crystals responsible of the intestinal obstruction. A rare cause of intestinal obstruction to bear in mind in chronically medicated patients with cation exchange resins.eng© The Authors 2024http://creativecommons.org/licenses/by/4.0/Cation exchange resinsHyperkalemiaIntestinal obstructionPolystyrene sulfonic acidRenal insufficiencyChronicjournal article10.1093/jscr/rjae2012042-8812open access