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Ulcerative colitis is a chronic inflammatory condition primarily affecting the colon and rectum. The primary drugs used in the treatment of ulcerative colitis are aminosalicylates. They exhibit anti-inflammatory and immunosuppressive properties. They modulate inflammatory mediators and inhibit the activity of nuclear factor κB (NF-κB). Aminosalicylates also reduce inflammation by inhibiting prostaglandin and leukotriene production and decreasing neutrophil chemotaxis and superoxide...
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A patient with kidney disease experienced gastrointestinal bleeding. Doctors found colitis and ulcerations containing unusual crystals, possibly linked to medication. Further investigation is needed to confirm the cause.

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Area of Science:

  • Gastroenterology
  • Nephrology
  • Internal Medicine

Background:

  • A 61-year-old male with end-stage renal disease (ESRD) and a history of NSAID-induced ulcers presented with acute lower gastrointestinal bleeding.
  • The patient was on pantoprazole and sodium polystyrene sulfonate in sorbitol (Kayexalate) for hyperkalemia management.

Observation:

  • Esophagogastroduodenoscopy revealed a small, non-bleeding gastric ulcer.
  • Colonoscopy demonstrated colitis with localized ulcerations in the cecum.

Findings:

  • Histopathological examination of the cecal biopsies identified characteristic basophilic, nonpolarizable, rhomboid-like crystals.
  • No evidence of necrosis was observed in the ulcerated areas.

Implications:

  • The presence of these crystals suggests a potential link to sodium polystyrene sulfonate (Kayexalate) use in a patient with impaired renal function.
  • This case highlights the importance of considering medication-induced pathology in patients with ESRD presenting with gastrointestinal symptoms.
  • Further studies are warranted to elucidate the exact mechanism and clinical significance of these crystal formations in the gastrointestinal tract.