Subtotal colectomy in ulcerative colitis—long term considerations for the rectal stump

Table 1 Summary of papers

Ref.	Year	Surveillance interval	Surveillance method
Pastore et al[28]	1997	Yearly	Endoscopy with biopsy
Khubchandani et al[29]	1994	6 monthly to yearly	Endoscopy with biopsy
Petersen et al[30]	2008	2 yearly	Endoscopy with biopsy
da Luz Moreira et al[31]	2010	Yearly	Endoscopy with biopsy
Lutgens et al[32]	2012	Rectal stump, PSC, and disease duration > 8 yr: 1 to 2 yearly	Endoscopy with biopsy
Munie et al[15]	2013	Yearly	Endoscopy with biopsy
Andersson et al[33]	2014	Yearly	Endoscopy with biopsy
Scoglio et al[34]	2014	6 mo to yearly	Endoscopy with biopsy
Myrelid et al[36]	2015	< 20 yr of age + < 10 yr duration: yearly; early onset of the disease and > 10 yr duration: twice yearly; all others: yearly	Endoscopy with biopsy
Abdalla et al[35]	2017	Yearly	Endoscopy with biopsy
Derikx et al[37]	2018	High risk: yearly; Hx of PSC: 2-3 yearly; low risk: 5 yearly	Endoscopy with biopsy

PSC: Primary sclerosing cholangitis.