A 60-year-old woman with Rheumatoid arthritis presents with diarrhea and nausea. Colonoscopy and biopsy reveal a surprising diagnosis. What could it be?
A 60-year-old woman with a history of rheumatoid arthritis presented with diarrhea, nausea, and anorexia. Endoscopic examination of the colon and biopsy specimens with Congo red staining under polarized light are shown. What is the diagnosis?
What is the most likely diagnosis?
Colonoscopy, Congo red stain, Diarrhea, Gastrointestinal amyloidosis, Rheumatoid arthritis
