Table 1.

Patients’ clinical information.

No.	Patient Age	Sex	Type of Specimen	Site	Clinical History Provided	Associated Tissue Reaction	Background Renal Disease/History of Drug Intake
1	69	M	Biopsy	Sigmoid colon, rectum	Colonoscopy, longitudinal ulceration	Severe colitis	CKD with dialysis/calcium polystyrene sulfonate 15 days
2	80	F	Surgical specimen	Sigmoid colon	Perforation	Ulcer	CKD/calcium polystyrene sulfonate 5 months
3	83	M	Biopsy	Sigmoid colon, rectum	Colonoscopy, gastrointestinal bleeding	Erosive colitis	Ulcerative colitis/calcium polystyrene sulfonate 25 days
4	78	M	Biopsy	Transverse colon	Colonoscopy, polyp	Erosive colitis, inflammatory polyp	CKD/calcium polystyrene sulfonate 43 days
5	78	F	Biopsy	Stomach	Gastroscopy, cancer or amyloid deposition suspected	Gastritis	CKD/calcium polystyrene sulfonate 7 days, lanthnum carbonate 6 months
6	76	F	Surgical specimen	Sigmoid colon	Perforation	Ulcer	CKD/calcium polystyrene sulfonate 6 days
7	45	M	Biopsy	Transverse colon	Colonoscopy	White nodule	CKD/calcium polystyrene sulfonate unknown period, lanthunm carbonate unknown period
8	50	M	Surgical specimen	Descending colon	Surgery, ulcerative colitis	Severe colitis	Ulcerative colitis/calcium polystyrene sulfonate 18 days
9	69	F	Biopsy	Ascending colon	Colonoscopy, ulcerative Colitis	Ulcer	CKD/calcium polystyrene sulfonate unknown period