Table 1.
Prevalence of pseudopolyps in inflammatory bowel disease
| Ref. | Year of publication | IBD diagnosis | Prevalence of pseudopolyps | Special characteristics |
| Bargen et al[29] | 1929 | UC (n = 693) | 10.0% | |
| Baars et al[30] | 2012 | UC (n = 171) | 30.0% | 44% of UC patients and 30% of CD patients with unknown status for PP |
| CD (n = 77) | 38.0% | |||
| Baars et al[31] | 2012 | UC, CD (n = 152) | 20.0% | |
| Bacon et al[32] | 1956 | UC (n = 84) | 57.1% | Colectomy specimens |
| Bockus et al[27] | 1956 | UC (n = 125) | 74.0% | Hospitalized patients |
| Chang et al[21] | 2007 | CD (n = 23) | 22.0% | Examined only small intestine |
| Chawla et al[26] | 1990 | UC (n = 50) | 4.0% | |
| Chuttani et al[33] | 1967 | UC (n = 46) | 15.0% | |
| De Dombal et al[17] | 1966 | UC (n = 465) | 12.5% | |
| De Felice et al[19] | 2015 | CD (n = 24) | 4.0% | Location esophagus |
| Dukes et al[11] | 1954 | UC (n = 120) | 10.0% | Colectomy specimens |
| Edwards et al[34] | 1964 | UC (n = 624) | 14.9% | |
| Geboes et al[39] | 1975 | CD (n = 43) | 16.0% | |
| Jalan et al[10] | 1969 | UC (n = 399) | 18.7% | |
| Kelly et al[6] | 1987 | UC, CD (n = 86) | UC: 36% | Colectomy specimens |
| CD: 17% | ||||
| GPP: 4.6% | ||||
| Lescut et al[35] | 1993 | CD (n = 20) | 10.0% | Only small intestine examined as location |
| Luo et al[36] | 2009 | UC, CD (n = 34) | 29.0% | Pediatric population |
| Maroo et al[37] | 1974 | UC (n = 122) | 8.0% | |
| Modigliani et al[50] | 1990 | CD (n = 142) | 41.0% | Active colonic or ileocolonic CD |
| Ray et al[38] | 2011 | UC (n = 40) | 27.0% | |
| Rutter et al[44] | 2004 | UC (n = 136) | 39.0% | Control population without CRC Population with CRC |
| Tandon et al[40] | 1965 | UC (n = 69) | 17.6% | |
| Teague et al[41] | 1975 | UC (n = 150) | 17.0% | |
| Teh et al[42] | 1987 | UC (n = 61) | 21.3% | |
| Velayos et al[43] | 2006 | UC (n = 188) | 42.0% | Control population without CRC Population with CRC |
| UC (n = 188) | 56.0% | |||
| Wang et al[45] | 2007 | UC (n = 2726) | 22.0% | Active UC |
| Watts et al[46] | 1966 | UC (n = 169) | 47.0% | Surgical specimens |
| Waugh et al[47] | 1964 | UC (n = 205) | 5.9% | Surgical specimens |
| Wright et al[48] | 1965 | UC (n = 269) | 10.0% | |
| Zheng et al[49] | 2007 | CD (n = 27) | 48.0% |
CD: Crohn's disease; CRC: Colorectal cancer; IBD: Inflammatory bowel disease; UC: Ulcerative colitis.