Ulcérations coliques associées à la prise de Kayexalate® (polystyrène sulfonate de sodium) : à propos de deux observations

We report two cases of patients with chronic renal failure showing rectal bleeding due to digestive ulcers, associated with Kayexalate® alone. Kayexalate® crystals correspond to a typical histological picture and it is important to know how to identify them in order to discuss a possible pathogenicity.